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SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN ISSUER Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

For the month of March 2006

Eni S.p.A. (Exact name of Registrant as specified in its charter)

Piazzale Enrico Mattei 1 - 00144 Rome, Italy (Address of principal executive offices)

(Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.)

Form 20-F x Form 40-F o

(Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2b under the Securities Exchange Act of 1934.)

Yes o No x

(If Yes is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): )

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TABLE OF CONTENTS TOC

Press Release dated March 31, 2006

Annual Report at December 31, 2005 (the Reports of the Statutory Auditors and of the External Auditors will be made public starting from May 9, 2006)

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/TOC

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorised.

Eni S.p.A.
Name: Fabrizio Cosco
Title:	Company Secretary

Date: March 31, 2006

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PRESS RELEASE

Società per Azioni Rome, Piazzale Enrico Mattei, 1 Capital stock euro 4,005,358,876 fully paid Registro Imprese di Roma, c. f. 00484960588 Tel. +39-0659821 Fax +39-0659822141 www.eni.it

Eni: 2005 Consolidated Financial Statements Record net profit of euro 8.8 billion and dividend of euro 1.10 per share confirmed

San Donato Milanese, 31 March 2006 - Enis Board of Directors approved yesterday Enis 2005 consolidated financial statements which show a net profit of euro 8,788 million 1 and the draft statutory financial statements of the parent company Eni SpA which show a profit of euro 5,288 million. The Board of Directors resolved to propose to the annual Shareholders Meeting the distribution of a dividend amounting to euro 1.10 per share 2 (pay out 47%), which includes euro 0.45 already distributed as interim dividend in October 2005. The balance of euro 0.65 will be paid on 22 June 2006, 19 June 2006 being the ex-dividend date. Enis consolidated financial statements and Eni SpAs draft statutory financial statements were submitted to the Board of Statutory Auditors and to Enis external auditors. Enclosed are the consolidated profit and loss account and balance sheet of Eni and the statutory profit and loss account and balance sheet of Eni SpA. Galp: new agreement in force The Board of Directors was informed that on 29 March 2006 the new agreement for the joint control of Galp entered into by Eni, Rede Electrica Nacional (REN) and Amorim Energia on 29 December 2005 3 came in force due to the occurrence of the suspensive clauses. The earlier agreement between Eni and the Portuguese State, with expected expiration on 31 May 2006, is therefore terminated as well as the rights and obligations therein contained. At the present date shareholders of Galp are: Eni (33.34%), the Portuguese State (17.711%), Parpublica (12.293%), REN (18.30), Amorim Energia (13.312%), Iberdrola (4%), Caixa Geral de DepÓsitos (1%), Setgas (0.044%). Incorporation of EniTecnologie into Eni The Board approved the merger into the parent company Eni SpA of Enis wholly-owned subsidiary EniTecnologie with the aim of integrating research and development activities and simplifying Enis shareholding structure, and increasing efficiency by reducing decision levels and rationalizing staff structures.

| (1) | This result is the same
as the preliminary results announced, for details see
Press Release of 1 March 2006. |
| --- | --- |
| (2) | As a
consequence of new tax laws in force from 1 January 2004,
dividends do not entitle to a tax credit and, depending
on the receiver, are subject to a withdrawal tax on
distribution or are partially cumulated to the
receivers taxable income. |
| (3) | For the
details of the agreement see Eni press release of 30
December 2005. |

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Contacts

e-mailbox : [email protected]

Investor Relations:

Jadran Trevisan Antonio Pinto - Marco Porro e-mailbox : [email protected] Eni SpA Piazza Vanoni, 1 20097 San Donato Milanese (Milan) - Italy tel.:+39-02520.51651 - fax: +39-02520.31929

Eni Press Office:

Gianni Di Giovanni Domenico Negrini Tel.: +39 - 02520.31287 [email protected] [email protected]

This press release is available on Enis internet site. Enis 2005 Annual Report will be available on Enis internet site at 18:00.

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Attachment

Eni consolidated profit and loss account (million euro)

2004 2005 Change % Ch.

| Net sales from operations — Other
income and revenues | 57,545 — 1,377 | | 73,728 — 798 | | 16,183 — (579 | ) | 28.1 — (42.0 | ) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Operating expenses | (41,592 | ) | (51,918 | ) | (10,326 | ) | (24.8 | ) |
| Depreciation,
amortization and impairments | (4,931 | ) | (5,781 | ) | (850 | ) | (17.2 | ) |
| Operating profit | 12,399 | | 16,827 | | 4,428 | | 35.7 | |
| Net
financial expense | (156 | ) | (366 | ) | (210 | ) | 134.6 | |
| Net income from investments | 820 | | 914 | | 94 | | 11.5 | |
| Profit
before income taxes | 13,063 | | 17,375 | | 4,312 | | 33.0 | |
| Income taxes | (5,522 | ) | (8,128 | ) | (2,606 | ) | (47.2 | ) |
| Profit
before minority interest | 7,541 | | 9,247 | | 1,706 | | 22.6 | |
| Minority interest | (482 | ) | (459 | ) | 23 | | 4.8 | |
| Net
profit | 7,059 | | 8,788 | | 1,729 | | 24.5 | |

Eni consolidated balance sheet (million euro)

31 Dec. 2004 31 Dec. 2005 Change

| Fixed assets — Property,
plant and equipment, net | 40,586 | | 45,013 | | 4,427 | |
| --- | --- | --- | --- | --- | --- | --- |
| Compulsory stock | 1,386 | | 2,194 | | 808 | |
| Intangible
assets, net | 3,313 | | 3,194 | | (119 | ) |
| Investments, net | 3,685 | | 4,311 | | 626 | |
| Accounts
receivable financing and securities related to operations | 695 | | 775 | | 80 | |
| Net accounts payable in relation to capital
expenditure | (888 | ) | (1,196 | ) | (308 | ) |
| | 48,777 | | 54,291 | | 5,514 | |
| Working capital, net | (1,812 | ) | (3,568 | ) | (1,756 | ) |
| Employee
termination indemnities and other benefits | (982 | ) | (1,031 | ) | (49 | ) |
| Capital employed, net | 45,983 | | 49,692 | | 3,709 | |
| Shareholders
equity including minority interests | 35,540 | | 39,217 | | 3,677 | |
| Net borrowings | 10,443 | | 10,475 | | 32 | |
| Total
liabilities and shareholders equity | 45,983 | | 49,692 | | 3,709 | |

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Eni SpA profit and loss account (million euro)

2004 2005 Change

| Net sales from operations — Other
income and revenues | 34,017 — 376 | | 44,812 — 285 | | 10,795 — (91 | ) |
| --- | --- | --- | --- | --- | --- | --- |
| Operating expenses | (30,262 | ) | (41,033 | ) | (10,771 | ) |
| Depreciation,
amortization and impairments | (907 | ) | (809 | ) | 98 | |
| Operating profit | 3,224 | | 3,255 | | 31 | |
| Net
financial expense | (56 | ) | (24 | ) | 32 | |
| Net income from investments | 1,394 | | 3,462 | | 2,068 | |
| Profit
before extraordinary items and income taxes | 4,562 | | 6,693 | | 2,131 | |
| Net extraordinary (expense) income | (55 | ) | (467 | ) | (412 | ) |
| Elimination
of tax interference | 1,076 | | | | (1,076 | ) |
| Profit before income taxes | 5,583 | | 6,226 | | 643 | |
| Income
taxes | (899 | ) | (938 | ) | (39 | ) |
| Net profit | 4,684 | | 5,288 | | 604 | |

Eni SpA balance sheet (million euro)

31 Dec. 2004 31 Dec. 2005 Change

| Fixed assets — Property,
plant and equipment, net | 4,906 | | 4,733 | | (173 | ) |
| --- | --- | --- | --- | --- | --- | --- |
| Intangible assets, net | 714 | | 631 | | (83 | ) |
| Investments,
net | 20,825 | | 21,049 | | 224 | |
| Accounts receivable financing and securities
related to operations | 29 | | 29 | | | |
| Net
accounts payable in relation to capital expenditure | (626 | ) | (447 | ) | 179 | |
| | 25,848 | | 25,995 | | 147 | |
| Working
capital, net | 1,536 | | 549 | | (987 | ) |
| Reserve for employee termination indemnities | (202 | ) | (222 | ) | (20 | ) |
| Capital
employed, net | 27,182 | | 26,322 | | (860 | ) |
| Shareholders equity | 26,204 | | 25,440 | | (764 | ) |
| Net
borrowings | 978 | | 882 | | (96 | ) |
| Total liabilities and shareholders
equity | 27,182 | | 26,322 | | (860 | ) |

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Mission

We are a major integrated energy company, committed to growth in the activities of finding, producing, transporting, transforming and marketing oil and gas. Eni men and women have a passion for challenges, continuous improvement, excellence and particularly value people, the environment and integrity

Countries of activity

EUROPE

Austria, Belgium, Croatia, Cyprus, Czech Republic, Denmark, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Switzerland, Turkey, United Kingdom

CIS

Azerbaijan, Georgia, Kazakhstan, Russia

AFRICA

Algeria, Angola, Cameroon, Chad, Congo, Egypt, Guinea Bissau, Libya, Morocco, Nigeria, Senegal, Somalia, South Africa, Sudan, Tunisia

MIDDLE EAST

Iran, Kuwait, Oman, Qatar, Saudi Arabia, United Arab Emirates

CENTRAL ASIA

India, Pakistan

SOUTH EAST ASIA AND OCEANIA

Australia, China, Indonesia, Japan, Malaysia, Papua-New Guinea, Singapore, South Korea, Taiwan, Thailand, Vietnam

AMERICAS

Argentina, Brazil, Canada, Dominican Republic, Ecuador, Mexico, Peru, Trinidad & Tobago, United States, Venezuela

Table of Contents

| Report of
the Directors | Profile
of the year |
| --- | --- |
| 8 | Letter to our Shareholders |
| | Operating
Review |
| 14 | Exploration & Production |
| 30 | Gas & Power |
| 42 | Refining & Marketing |
| 48 | Petrochemicals |
| 51 | Oilfield Services Construction and Engineering |
| 54 | Financial Review |
| 66 | Other Information |
| 68 | Corporate Governance |
| 88 | Commitment sustainable development |
| 89 | Human resources and organization |
| 94 | Responsibility towards the environment |
| 97 | Responsibility towards stakeholders |
| 100 | Risk management |
| 103 | Innovation |
| 106 | Glossary |
| 109 | Report of Independent Auditors |
| | Consolidated
Financial Statements |
| 111 | Effects of the adoption of IFRS |
| 120 | Balance sheet |
| 121 | Profit and loss account |
| 122 | Statement of changes in shareholders
equity |
| 124 | Statement of cash flows |
| 127 | Basis of presentation |
| 127 | Principles of consolidation |
| 128 | Evaluation criteria |
| 134 | Use of accounting estimates |
| 135 | Recent accounting principles |
| 137 | Notes to
the consolidated financial statements |
| | This Annual
Report includes the report of Enis Board of
Directors and Enis consolidated financial
statements for the year ended 31 December 2005, which
have been prepared under the International Financial
Reporting Standards (IFRS), as adopted by the European
Union. |
| 30 March 2006 | |

Contents

| Profile
of the year | ● |
| --- | --- |
| Results Net profit
for 2005 was a record euro 8.8 billion, up euro 1.7
billion or 24.5% compared with 2004. This was driven by a
strong operating performance (up euro 4.4 billion or
35.7%) achieved across all Enis business areas
boosted also by higher oil and gas prices.The share of
operating profit earned outside Italy increased to 68%
(56% in 2004). Total shareholder return was 35.3% (28.5%
in 2004) Dividend The increase in earnings and in cash flow provided by
operating activities, along with a sound balance sheet
structure allow Eni to distribute to shareholders a cash
dividend of euro 1.10 per share for 2005, up 22%,
compared with euro 0.90 per share the previous year.
Included in the euro 1.10 amount is euro 0.45 per share
already distributed as an interim dividend. Pay-out
stands at 47% Oil and natural gas production Oil and natural gas production for the year 2005 grew
a solid 7% to above 1.74 mboe/d. Excluding the adverse
impact of lower entitlements in certain PSAs and buy-back
contracts due to higher oil prices, this increase was 9%.
In the first two months of 2006 production exceeded 1.8
mboe/d | Proved oil and
natural gas reserves Net proved reserves of
oil and natural gas were 6.84 billion boe (55% crude and
condensates) at year-end, down 381 mboe from 2004 due to
an estimated 478 mboe adverse impact related to lower
entitlements in certain PSAs and buy-back contracts due
to higher oil prices (58.205 dollar per barrel at
year-end 2005 as compared to 40.47 at year-end 2004).
Excluding the price impact, the reserve replacement ratio
was 115%. The average reserve life index is 10.8 years
(12.1 at 31 December 2004) The Kashagan project Enis operatorship interest in the Kashagan
project increased from 16.67% to 18.52%. The field
located in the Kazakh offshore section of the Caspian Sea
is considered the most important discovery in the world
in the past thirty years with recoverable reserves of
about 13 billion bbl through partial gas reinjection. The
development of the project is advancing as planned, with
40% of work already completed. First oil is expected by
the end of 2008 and the production plateau is targeted at
over 1.2 mbbl/d |

Contents

Enhancement of asset portfolio Eni enhanced its portfolio of mineral rights via acquisition of exploration permits and production licenses located mainly in core areas such as Libya, Nigeria and Angola, as well as in new high-potential basins such as Alaska and India for a total net acreage of approximately 67,000 square kilometers (44,000 square kilometers net to Eni) Growth in natural gas Natural gas sales volumes were up 8% to 96 bcm reflecting higher sales on both the Italian and European natural gas markets. Sales of liquefied natural gas (LNG) achieved 7 bcm, up 17% compared with 2004 Power generation development plan Sold production of electricity (22.8 terawatthour) was up 64.4%. At year-end 2005 Enis installed capacity was 4.5 gigawatt and will allow consumption of over 6 bcm/y of natural gas supplied by Eni when it achieves 5.5 gigawatt of installed capacity by 2009 Integration of Saipem and Snamprogetti The integration of Saipem and Snamprogetti will create a world leader in engineering and oilfield services, increasing their role in Enis core business growth

Contents

Selected consolidated financial data Italian GAAP IFRS

2001 2002 2003 2004 2004 2005

Net sales from operations	(million euro)	49,272	47,922	51,487	58,382	57,545	73,728
Operating
profit	(million euro)	10,313	8,502	9,517	12,463	12,399	16,827
Net profit	(million euro)	7,751	4,593	5,585	7,274	7,059	8,788
Net cash
provided by operating activities	(million euro)	8,084	10,578	10,827	12,362	12,500	14,936
Capital expenditure	(million euro)	6,606	8,048	8,802	7,503	7,499	7,414
Investments	(million euro)	4,664	1,366	4,255	316	316	127
Shareholders equity including minority
interest	(million euro)	29,189	28,351	28,318	32,466	35,540	39,217
Net
borrowings	(million euro)	10,104	11,141	13,543	10,228	10,443	10,475
Net capital employed	(million euro)	39,293	39,492	41,861	42,694	45,983	49,692
Return On
Average Capital Employed (ROACE)	(%)	23.9	13.7	15.6	18.8	16.6	19.5
Leverage		0.35	0.39	0.48	0.31	0.29	0.27
Earnings
per share (1)	(euro)	1.98	1.20	1.48	1.93	1.87	2.34
Dividend per share	(euro)	0.750	0.750	0.750	0.90	0.90	1.10
Dividends
paid (2)	(million euro)	2,876	2,833	2,828	3,384	3,384	4,096
Pay-out	(%)	37	62	51	47	48	47
Total
shareholder return	(%)	6	13.1	4.3	28.5	28.5	35.3
Dividend yield (3)	(%)	5.6	5.2	5.1	4.9	4.9	4.7
Number of
shares outstanding at period end (4)	(million)	3,846.9	3,795.1	3,772.3	3,770.0	3,770.0	3,727.3
Market capitalization (5)	(billion euro)	54.0	57.5	56.4	69.4	69.4	87.3

| (1) | Ratio of
net profit and the average number of shares outstanding
in the year. The dilutive effect is negligible. |
| --- | --- |
| (2) | Per fiscal
year. 2005 data are estimated. |
| (3) | Ratio of
dividend for the period and average price of Eni shares
in December 2005. |
| (4) | Excluding
own shares in portfolio. |
| (5) | Number of
outstanding shares by reference price at period end. |

Financial data for 2004 and 2005 have been derived from Enis financial statements prepared under the International Financial Reporting Standards (IFRS), as adopted by the European Union and are therefore not comparable with those of preceding years, which had been derived from financial statements prepared under Italian GAAP. The main differences between IFRS and Italian GAAP relate essentially to: (i) higher book value of tangible assets due primarily to a revision of the useful lives of gas pipelines, compression stations and distribution networks; (ii) recognition of deferred tax assets whenever their recoverability is probable instead of a reasonable degree of recoverability under Italian GAAP; (iii) capitalization of estimated costs for asset retirement obligations and higher financial charges; (iv) application of the weighted-average cost method for inventory accounting instead of the Last In First Out inventory accounting method; (v) write-off of the reserve for contingencies in absence of an actual obligation and use of actuarial techniques for the recording of employee benefits; (vi) goodwill is no longer amortized and is reviewed at least annually for impairment; previously it was systematically amortized; (vii) exclusion from consolidation of joint ventures; (viii) reclassification of extraordinary items in operating income. The analysis of the nature of these main changes is found in the Notes to the consolidated financial statements in the chapter Effects of the adoption of IFRS. Forward-looking statements Certain disclosures contained in this annual report concerning plans, objectives, targets and other future developments are forward-looking statements. By their nature forward-looking statements involve risk and uncertainty. The factors described herein could cause actual results of operations and developments to differ materially from those expressed or implied by such forward-looking statements.

Key market indicators

2001 2002 2003 2004 2005

Average price of Brent dated crude oil (1)		24.46	24.98	28.84	38.22	54.38
Average
EUR/USD exchange rate (2)		0.896	0.946	1.131	1.244	1.244
Average price in euro of Brent dated crude oil		27.30	26.41	25.50	30.72	43.71
Average
European refining margin (3)		1.97	0.80	2.65	4.35	5.78
Average European refining margin in euro		2.20	0.85	2.34	3.50	4.65
Euribor -
three-month euro rate	(%)	4.3	3.3	2.3	2.1	2.2
Libor - three-month dollar rate	(%)	3.7	1.8	1.2	1.6	3.5

| (1) | In US dollars per barrel. Source: Platts
Oilgram. |
| --- | --- |
| (2) | Source:
ECB. |
| (3) | In US
dollars per barrel FOB Mediterranean Brent dated crude
oil. Source: Eni calculations based on Platts
Oilgram data. |

Contents

Selected operating data

2001 2002 2003 2004 2005

| Exploration & Production — Net proved
reserves of hydrocarbons | (million boe) | 6,929 | 7,030 | 7,272 | 7,218 | 6,837 |
| --- | --- | --- | --- | --- | --- | --- |
| Average reserve life index | (years) | 13.7 | 13.2 | 12.7 | 12.1 | 10.8 |
| Production
of hydrocarbons | (thousand boe/d) | 1,369 | 1,472 | 1,562 | 1,624 | 1,737 |
| Gas & Power | | | | | | |
| Sales of
natural gas to third parties | (billion cubic meters) | 63.72 | 64.12 | 69.49 | 72.79 | 77.08 |
| Own consumption of natural gas | (billion cubic meters) | 2.00 | 2.02 | 1.90 | 3.70 | 5.54 |
| | | 65.72 | 66.14 | 71.39 | 76.49 | 82.62 |
| Sales of natural gas of affiliates (Enis
share) | (billion cubic meters) | 1.38 | 2.40 | 6.94 | 7.32 | 8.53 |
| Total
sales and own consumption of natural gas | (billion cubic meters) | 67.10 | 68.54 | 78.33 | 83.81 | 91.15 |
| Natural gas transported on behalf of third
parties in Italy | (billion cubic meters) | 11.41 | 19.11 | 24.63 | 28.26 | 30.22 |
| Electricity
production sold | (terawatthour) | 4.99 | 5.00 | 5.55 | 13.85 | 22.77 |
| Refining & Marketing | | | | | | |
| Refined
products available from processing | (million tonnes) | 37.78 | 35.55 | 33.52 | 35.75 | 36.68 |
| Balanced capacity of wholly-owned refineries at
period end | (thousand barrels/day) | 664 | 504 | 504 | 504 | 524 |
| Utilization
rate of balanced capacity of wholly-owned refineries | (%) | 97 | 99 | 100 | 100 | 100 |
| Sales of refined products | (million tonnes) | 53.24 | 52.24 | 50.43 | 53.54 | 51.63 |
| Service
stations at period end (in Italy and outside Italy) | (units) | 11,707 | 10,762 | 10,647 | 9,140 | 6,282 |
| Average throughput in Italy and outside Italy of
Agip-branded network | (thousand liters per year) | 1,685 | 1,858 | 2,109 | 2,488 | 2,479 |
| Petrochemicals | | | | | | |
| Production | (thousand tonnes) | 9,609 | 7,116 | 6,907 | 7,118 | 7,282 |
| Sales | (thousand tonnes) | 6,113 | 5,493 | 5,266 | 5,187 | 5,376 |
| Oilfield Services Construction and
Engineering | | | | | | |
| Orders
acquired | (million euro) | 3,716 | 7,852 | 5,876 | 5,784 | 8,188 |
| Order backlog at period end | (million euro) | 6,937 | 10,065 | 9,405 | 8,521 | 9,964 |
| Employees at period end | (units) | 72,405 | 80,655 | 75,421 | 70,348 | 72,258 |

Contents

| Enis Board of
Directors | ● | ● | ● |
| --- | --- | --- | --- |
| Roberto Poli Chairman | Paolo Scaroni CEO | Alberto Clô Director | Renzo Costi Director |

Letter to our Shareholders Dear Shareholders, Eni had an outstanding 2005, both in terms of its financial and of its operating performance. We are Italys leading company by market capitalization and are achieving ever greater prominence on the international stage. Eni delivered a record net profit of euro 8.8 billion in 2005, 24.5% more than in 2004. Operating profit amounted to euro 16.8 billion (+35.7%). The increase was due to a combination of a superior volume growth and ongoing performance improvements. Of course, we benefited from last years favorable trading environment, which saw strong gains both in crude oil prices and in refining margins. However, we are pleased with the strong operating performance throughout our businesses. In particular, we achieved a 7% increase in oil and gas production, which is among the very highest in the industry. This growth came from build-up in existing fields and the start-up of 15 new fields. Libya, Angola and Algeria were the countries with the highest production increase. We also confirmed our position as the largest gas company in Europe, increasing sales by a very strong 8% during the year. Strong results enabled us to propose a dividend of euro 1.1 per share, of which euro 0.45 already paid as interim dividend in October 2005, 22% higher than in 2004 (euro 0.90 per share), with a payout of 47%. We achieved a total shareholder return of 35.3% (28.5% in 2004). Operating results In EXPLORATION & PRODUCTION , we continued to build on our strong position in some of the worlds fastest-growing producing nations to deliver industry-leading growth. Daily production of hydrocarbons increased by 7% to 1.74 million boe. Excluding the impact of the higher crude oil price on entitlement production from Production Sharing Agreements (PSAs) and buy-back contracts, the growth rate for the year was 9%. Net proved reserves of oil and natural gas were 6.8 billion boe at year-end (55% crude and condensates), down 381 mboe from 2004 due to an estimated 478 mboe adverse impact related to the PSA effect. Excluding the price impact, the reserve replacement ratio was 115%. The end-year reserves life index is 10.8 years (12.1 years at 31 December 2004). Sales of liquefied natural gas and of gas to liquefaction plants (LNG) reached 7 bcm, an increase of 17% on 2004, confirming our strong commitment in that business. We increased our share in the Kashagan project (Kazakhstan) from 16.67% to 18.52%. Kashagan is the

Contents

Dario Fruscio Director Marco Pinto Director Marco Reboa Director Mario Resca Director Pierluigi Scibetta Director

largest field discovered in the world for the last 30 years (around 13 billion barrels of recoverable reserves using partial gas injection). The development of the project, of which we are the sole operator, is on track, with 40% of work completed, and we confirm our target of first oil production by end-2008. We enhanced our exploration portfolio with the acquisition of assets in core areas such as Libya, Nigeria and Angola, as well as in new high-potential basins such as Alaska and India. In GAS & POWER , we are leveraging on our unique positioning in terms of access to infrastructure, availability of gas both equity and purchased under long term supply contracts and large customer base, to further extend our leadership in the highly attractive European gas market. Overall gas sales in 2005 totalled 96 bcm, 8% up from 2004. This growth has been driven by international gas sales as well as by larger volumes sold in Italy, in line with our strategy to grow in the most attractive markets: gas sales across Europe (36 bcm) rose 9% up from 2004, driven also by the build up of the Greenstream project; Italian gas sales (58 bcm) increased by 8%, mainly driven by the power business gas consumption; gas sales in South America were stable at 2 bcm. Electricity sales (22.8 TWh) increased by 64% from 2004 as a result of the start-up of two power units at the Mantova power plant and the first unit of the Brindisi plant, as well as full commercial operation at the Ravenna and Ferrera Erbognone plants. In REFINING & MARKETING , we are seeking to maximize returns from our assets by upgrading our refining system, increasing integration with our E&P activities and strengthening our competitive position in marketing. We completed the construction of the Sannazzaro gasification plant and the disposal of the IP retail subsidiary. We have also continued to monitor neighboring European markets in order to capitalize on opportunities for profitable expansion. Overall retail sales in Europe under Agip brand amounted to 16 billion liters, of which 11.3 billion liters were in Italy. In ENGINEERING & CONSTRUCTION , Saipem was awarded important contracts in challenging environments such as Kashagan in Kazakhstan and Sakhalin in Russia, confirming its role as a leader in international markets. Snamprogetti significantly increased its backlog, closing 2005 with strong financial results. The PETROCHEMICALS business had another positive year: Polimeri Europa recorded a good performance,

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consolidating and improving its position in the European market. A selective and disciplined approach to Capital Expenditure also contributed to our outstanding operating results. We invested euro 7.4 billion in 2005, in line with 2004, mainly in oil and gas (91%): development of hydrocarbon reserves (euro 3.95 billion), mainly in Kazakhstan, Libya, Angola, Egypt and Italy, as well as exploration (euro 656 million) and the acquisition of proved, probable and possible reserves (euro 301 million, of which euro 161 million was for the acquisition of an additional 1.85% share in the consortium developing Kashagan); expansion and maintenance of the natural gas transportation and distribution network in Italy (euro 825 million); ongoing power generation construction programme (euro 239 million); upgrading of our Italian refining and logistics system to enhance flexibility and increase the yields of light products and middle distillates, including completion of the heavy residue gasification plant at the Sannazzaro refinery and improvement of the retail distribution network both in Italy and in the rest of Europe (euro 656 million). Energy market outlook E&P The need to increase oil and gas production and above all renew the reserve base represents the industrys most critical challenge. Widespread concern over security of international supplies has helped push crude prices well above the level that fundamentals seem to justify. A lack of spare production capacity worldwide means that supply interruptions either upstream or downstream have amplified price effects. While the industry is generating huge cash flows, new investment opportunities to sustain production growth involve greater financial, technological and environmental demands than ever before. Tighter contractual and tax terms as well as cost inflation throughout the industry are also reducing the profitability of upstream projects. At the same time higher oil and gas prices have sharply increased the value of the oil companies reserves, making acquisitions extremely expensive. We expect Brent oil prices to remain in the range of $50 a barrel for the next two years, after which for planning purposes we assume declining prices gradually returning to a level of around $30 a barrel in 2010. Technological advances and higher natural gas prices have made LNG the best solution for monetizing remote gas reserves. Yet, the expansion of LNG is hindered by the resistance of local communities to the construction of regasification terminals, on environmental and safety grounds. G&P Prices are likely to remain high, driven by strong demand growth in the main consuming markets, Europe and North America. Prices will also be supported by infrastructure limits and declining production in traditional basins. In coming years the European gas market will see an increase in its already marked dependence on imports; by 2015 80% of consumption will be covered by imported gas, compared to the current 37%. The shortages occurred this winter have made it clear that developing new infrastructure is a top priority. R&M The structural excess capacity in western countries has gradually been reduced. This, combined with more stringent quality standards and rising demand for middle distillates, has led to temporary bottlenecks in the refined products market. Operators are investing to upgrade existing plants in order to improve the flexibility and conversion capacity of the system. As this new capacity comes onstream, our outlook is for declining margins, returning towards historic levels. In such an environment we do not see opportunities for major capital expenditures in new green field capacity. Instead, we are focusing on improving complexity in existing refineries. Petrochemicals The business is characterized by a structural over-capacity both in Europe and worldwide. In particular, the European petrochemical industry suffers aggressive competition from Middle East countries, which benefit from the low cost of raw materials and the large size of plants, built in areas with low environmental sensitivity. Strategy and targets Enis 2006-2009 Strategic Plan is the most far-reaching we have ever launched in terms of capital expenditure, which underpins a continued strong organic growth beyond 2009. For us, acquisitions are an option not a necessity. Exploration & Production Organic growth is a strategic priority. We have strong prospects based on our portfolio in the worlds most

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attractive producing areas Nigeria, Angola, Algeria, Libya and Kazakhstan. We have set ourselves ambitious targets for this business: to increase production organically by 4% a year to more than 2 million boe per day by 2009 (assuming a Brent oil price of 32 $/bbl); to achieve an average reserves replacement of more than 100%; to extend and renew our exploration portfolio, by strengthening our presence in core areas (e.g. Libya, Nigeria) and by accessing new areas; to improve operating efficiency, curbing the increase in unit costs. Looking beyond 2009, we see further growth both from our strong existing positions and from new opportunities. We expect to deliver a 3% increase in production every year between 2009 and 2012. This will be driven by our leading positions in existing long life and high growth assets such as West Africa, Karachaganak and Kashagan; our LNG projects in North and West Africa; exploration in areas such as North Africa and Barents Sea, and new opportunities in gas projects, oil reserves and non-conventional oil. In LNG we aim to accelerate our growth to become one of the international leaders, focusing on production areas with high potential and low costs. We will monetize our existing equity gas availability (mainly in Nigeria, Egypt, Australia and Indonesia), supplying the European and the US markets. Overall, LNG sales will amount to around 13 bcm in 2009, with a 16% increase per year versus 2005. We will also deliver above average growth beyond 2009. Through the existing project portfolio we expect to achieve more than 20 bcm of sales in 2012. Gas & Power Eni aims to strengthen its position as the leading European operator in terms of sales by maximizing value from our unique mix of equity gas in Italy, Libya, Egypt and the North Sea and long-term supply contracts with major producers Gazprom, Sonatrach, Gasunie and Statoil. We expect to grow our market share of the European gas market, where total demand will rise by more than 12% during the four years of our plan. We have launched our expansion in the European markets in 2000. Having started from scratch, we now sell more than 35 bcm outside Italy. We are well positioned in Spain, Germany, Turkey, UK, France and in Portugal, where we have recently formed a strategic partnership that will enable us to manage Galp as a private company with our Portuguese partner. We aim to reach 50 bcm of our international sales by 2009, bringing our overall volume of gas sold to more than 100 bcm. We expect to sell more than 110 bcm in total by 2012. In Italy, we aim to preserve volumes and margins, leveraging on the competitiveness of our commercial offer. In the gas distribution business, we aim to extend our concessions portfolio, favoring development in areas close to large towns and cities. We are also enhancing the infrastructure to deliver gas to Italy through a widespread integrated transportation network with multiple entry points and storage capacity. In total, Eni will build-up an additional import capacity of approximately 25 bcm by 2009. In particular, we are: expanding the TAG (Russia) and TTPC (Algeria) gas pipelines and building-up the Greenstream (Libya); evaluating the opportunity of building a regasification terminal in Italy; improving Italys national transportation network; upgrading storage capacity, mainly through the development of the Bordolano field. In the next four years our total investment in the import, transportation, distribution and storage of gas in Italy will amount to nearly euro 6 billion. Within this context, it is worth mentioning the gas supply shortages which struck Italy in the winter 2005-2006. The supply disruption was mainly due to a colder-than-expected winter, growing gas use in power generation and a reduction of Russian deliveries due to a gas dispute with Ukraine. These factors were not foreseeable and were beyond our control. However, the gradual increase in import capacity underpinned by our capital expenditure program will make the system better-placed to cope with unexpected supply problems. In the shorter term, we expect that an evolution in the European regulatory framework will increase the systems overall flexibility. EniPower the power generation company we established to comply with regulatory ceilings in the Italian gas market is completing the development of efficient and profitable projects. We aim to generate the same free cash flow in 2009 as we did in 2005, despite the expected deconsolidation of Snam Rete Gas by the end of 2008. The increasing role of our international activities as well as our power generation business will contribute substantially to this target. Refining & Marketing We have a very strong position in Italy and our strategy is to maximize returns from our valuable existing assets.

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We are investing in new conversion capacity to make our refining system more flexible, in order to run a wider range of crude oils and to obtain a higher yield of middle distillates. This will increase our overall conversion index to almost 60% by 2009. We are also targeting a greater vertical integration with our upstream business, increasing the proportion of equity oil we run in our refineries. This will contribute to increase our European refinery throughput to 42 million tonnes per year by 2009. In marketing we will maintain our leadership in Italy and selectively increase our presence in neighboring regions. We will develop our offer of premium products, and generate more value from non-oil activities. Engineering & Construction This business represents a unique and distinctive feature for Eni. Saipem and Snamprogetti play instrumental roles in innovation and implementation of world-scale projects. Eni can benefit greatly from these companies in terms of project and risk management expertise, best in class skills, development of core technologies and key relationships with producing countries: essential elements to fuel the growth and expansion of the oil and gas business. The recently announced integration of Snamprogetti and Saipem creates a world leader in engineering and oilfield services, confirming that these activities are a core business for Eni. Petrochemicals We will consolidate our structure to improve returns even in unfavorable market conditions. We will invest to enhance the performance and reliability of plants in areas of excellence (styrenes and elastomers), as well as of the most competitive cracking plants. Technological research and innovation As a part of our growth process, we are making some of the most significant investments in technological research and innovation within our industry. This is to ensure we have the innovative technologies needed to create and maintain competitive advantages and to promote sustainable growth. We are reorganizing and relaunching Enis technological research, allocating to the Corporate both long-term and multi-business research as well as identification and acquisition of advanced external technologies, and allocating to individual Divisions and Companies research activities that will support the businesses operations. We will continue to pursue existing programmes on clean fuels, sulphur and greenhouse gas management as well as projects such as the upgrading of heavy crudes (EST), high pressure gas transmission (TAP) and Gas to Liquids (GTL). We are committed to work on issues with high potential impact on the core business. These include hybrid engines, use of gas in distributed generation, evolution of the biofuels market and development of equity condensates, fuel cells, hydrogen, photovoltaics, and application of the Kyoto Protocol in particular, CO 2 sequestration technologies and emissions trading. Cash allocation Our number one priority in allocating cash generated from operating activities is capital expenditure to drive long-term organic growth in the business. Over the next four years Eni will implement the largest capital expenditure program in its history driven by our commitment to organic growth. We will invest euro 35.2 billion, of which approximately two thirds is in Exploration and Production. All spending will meet our strict investment criteria on rate of return and assumes a long term Brent price of around $30 per barrel. We will also distribute significant amounts of cash to shareholders through an attractive and sustainable flow of dividends. We aim to use excess cash (after capex and dividends) to continue our programme of share buy-backs. We remain focused on maintaining a stable financial structure and our current credit rating. Human resources We are reviewing our organizational structures in order to streamline business processes and organization. Furthermore, we aim to enhance the role of central functions to make guidance and control more effective. A recruitment programme will target qualified personnel needed to support Enis development. Commitment for sustainable development At the centre of our strategy is a full commitment for sustainable development involving all aspects of our activity, from valuing our people to caring for the environment, from community development to technological innovation. This is a priority for all companies, but even more for a large international enterprise operating in an industry in which social and

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environmental management is a key element of success. Enis business model is oriented to fulfill our mission in ways that reduce the environmental impact and minimize the risks of climate change created by greenhouse gas emissions. Our plans to develop natural gas, a low carbon content fuel; to improve the already widespread gas transport infrastructure and to develop gas-electricity integration will all play their part in reducing environmental impact. Enis commitment to mitigate risks associated with climate change, in particular with greenhouse gas emissions, is also enforced through the use of the mechanisms set out in the Kyoto Protocol and in the associated international directives and conventions. We are also reorganizing our sustainability management system. A first result will be the publishing of a sustainability paper regarding Enis activities for sustainable development, which will be presented to the Shareholders Meeting, in addition to the publishing of the HSE Report. This will be followed by a full Sustainability Report from next year. We would like to thank the men and women of Eni who, with their enthusiasm and expertise, have made our record-breaking economic performance possible. Their skills and experience will be essential for Eni to continue on its successful path - as will a renewed commitment to face future challenges with the pioneering spirit that has always been a distinctive hallmark of Eni.

March 30, 2006

for the Board of Directors

Chairman Chief Executive Officer

| BOARD OF
DIRECTORS (1) | BOARD OF
STATUTORY AUDITORS (7) |
| --- | --- |
| Chairman | Chairman |
| Roberto Poli (2) | Paolo Andrea
Colombo |
| Chief
Executive Officer | Statutory
Auditors |
| Paolo Scaroni (3) | Filippo
Duodo, Edoardo Grisolia, Riccardo Perotta, Giorgio Silva |
| Directors | Alternate
Auditors |
| Alberto Clô,
Renzo Costi, Dario Fruscio, Marco Pinto, Marco Reboa,
Mario Resca, Pierluigi Scibetta | Francesco
Bilotti, Massimo Gentile |
| GENERAL
MANAGERS | MAGISTRATE OF
THE COURT OF ACCOUNTS |
| Exploration
& Production Division | DELEGATED
TO THE FINANCIAL CONTROL OF ENI |
| Stefano Cao (4) | Luigi Schiavello (8) |
| Gas & Power
Division | Alternate |
| Luciano Sgubini (5) | Angelo Antonio
Parente (9) |
| Refining &
Marketing Division | External
Auditors (10) |
| Angelo Taraborelli (6) | PricewaterhouseCoopers
SpA |

The composition and powers of the Internal Control Committee, Compensation Committee and International Oil Committee are presented in the section Corporate Governance in the Report of the Directors.

| (1) | Appointed by
the Shareholders' Meeting held on 27 May 2005 for a
three-year period. The Board of Directors expires at the
date of approval of the financial statements for the 2007
financial year. Until 27 May 2005 the Board of Directors
was composed of Roberto Poli, Chairman, Vittorio Mincato,
Managing Director, Mario Giuseppe Cattaneo, Alberto Clô,
Renzo Costi, Dario Fruscio, Guglielmo Antonio Claudio
Moscato, Mario Resca |
| --- | --- |
| (2) | Appointed by
the Shareholders Meeting held on 27 May 2005 |
| (3) | Powers
conferred by the Board of Directors on 1 June 2005 |
| (4) | Appointed by
the Board of Directors on 14 November 2000 |
| (5) | ppointed by
the Board of Directors on 30 January 2001. On 14 December
2005 Mr. Sgubini retired from the company. The Board of
Directors appointed Domenico Dispenza as General Manager
of the Gas & Power Division from 1 January 2006 |
| (6) | Appointed by
the Board of Directors on 14 April 2004 |
| (7) | Appointed by
the Shareholders Meeting held on 27 May 2005 for a
three-year period, expiring at the date of approval of
the financial statements for the 2007 financial year.
Until 27 May 2005 the Board of Statutory Auditors was
composed of Andrea Monorchio, Chairman, Luigi Biscozzi,
Paolo Andrea Colombo, Filippo Duodo, Riccardo Perotta and
as Alternate Auditors Fernando Carpentieri, Giorgio Silva |
| (8) | Duties
assigned by resolution of the Governing Council of the
Court of Accounts on 24-25 June 2003 |
| (9) | Duties
assigned by resolution of the Governing Council of the
Court of Accounts on 27-28 May 2003 |
| (10) | Appointed by
the Shareholders' Meeting of 28 May 2004 for a three-year
term |

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Exploration & Production

(million euro) 2004 2005

Revenues (1)		15,346	22,477
Operating
profit		8,185	12,574
Replacement cost operating profit		8,185	12,574
Adjusted
operating profit		8,202	12,883
Expenditure for exploration and new exploration
initiatives		499	656
Acquisitions
of proved and unproved property			301
Expenditure in development and capital goods		4,354	4,007
Employees
at period end	(units)	7,477	7,491

(1) Before elimination of intersegment sales.

Oil and natural gas production for the year 2005 grew a solid 7% to above 1.7 million barrels of oil equivalent (boe)/day. Excluding the adverse impact of lower entitlements in certain Production Sharing Agreements (PSA) and buy-back contracts 1 , this increase was 9%. In the first two months of 2006 production exceeded 1.8 million boe/day

Net proved reserves of oil and natural gas were 6.84 billion boe at year-end, down 381 million boe from 2004 due to an estimated 478 million boe adverse impact related to lower entitlements in certain PSAs and buy-back contracts due to higher oil prices (Brent price was 58.205 dollars per barrel at year-end 2005 as compared to 40.47 at year-end 2004). Excluding the price impact, the reserve replacement ratio was 115%. The average reserve life index is 10.8 years

(1) For a definition of PSA and buy-back contracts see Glossary below.

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As part of its strategy of expansion in areas with high mineral potential, Eni enhanced its portfolio of mineral rights via acquisition of exploration permits and production licenses located in Libya, India, Alaska, Brazil, Nigeria, Australia, Pakistan and the Gulf of Mexico for a total acreage of 67,000 square kilometers (44,000 net to Eni, of these 93% as operator)

In May 2005, the new setup of the consortium operating the North Caspian Sea PSA was defined. As a result of the transaction Enis operatorship interest in the Kashagan project increased from 16.67% to 18.52%. The development plan of the field located in the Kazakh offshore section of the Caspian Sea aims at producing up to 13 billion barrels of recoverable reserves through partial gas reinjection and a $29 billion capital expenditure. The development of the project is advancing as planned: first oil is expected by the end of 2008 and the production plateau is targeted at over 1.2 million barrels/day

As part of the Western Libyan Gas Project (Enis interest 50%) in August 2005 the offshore Bahr Essalam field was started-up, less than a year after the start-up of the onshore Wafa field. Peak production of the two fields is expected in 2006 at 256,000 boe/day (128,000 net to Eni). When fully operational in 2007 volumes produced and carried to Italy via the Green Stream pipeline will be 8 billion cubic meters/year of natural gas (4 billion net to Eni) already booked under long term supply contracts with operators

In Angola oil production increased over 50% also due to significant startups: phase B of the development of the fields discovered in the Kizomba offshore area in Block 15 (Enis interest 20%) and the North Sanha and Bomboco oil, condensate and LPG fields in Block 0 former Cabinda (Enis interest 9.8%)

Proved oil and natural gas reserves Proved oil and gas reserves are the estimated quantities of crude oil (including condensates and natural gas liquids) and natural gas which geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing technical, contractual, economic and operating conditions as of the date the estimate is made. Prices include consideration of changes in existing prices provided only by contractual arrangements, but not on escalations based upon future conditions. Eni has always held direct control over the booking of proved reserves. The Reserve Department of the Exploration & Production Division, reporting directly to the General Manager, is entrusted with the task of keeping reserve classification criteria (criteria) constantly updated and of monitoring their periodic process of estimate. The criteria follow Regulation S-X rule 4-10 of the Security and Exchange Commission as well as, on specific issues non regulated by rules, the consolidated practice recognized by qualified reference institutions. The current criteria applied by Eni have been examined by DeGolyer and MacNaughton (D&M) an independent oil engineers company, which confirmed that they are compliant with the SEC rules. D&M also stated that the criteria regulate situations for which the SEC rules are less precise, providing a reasonable interpretation in line with the generally accepted practices in international markets. Eni estimates its proved reserves on the basis of the mentioned criteria also when it participates in exploration and production activities operated by other entities. From 1991 Eni has requested qualified independent oil engineers companies to carry out an independent evaluation 2 of its proved reserves on a rotative basis. In particular in 2005 a total of 1.64 billion boe of proved reserves, or about 24% of Enis total proved reserves at 31 December 2005, have been evaluated. The results of this independent evaluation confirmed Enis evaluations, as they did in past years. In the 2003-2005 three-year period, independent evaluations concerned 84% of Enis total proved reserves.

(2) From 1991 to 2002 to DeGolyer and MacNaughton, from 2003 also to Ryder Scott.

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Further information on reserves are provided in Note 35 to Enis consolidated financial statements - Additional financial statement disclosures required by U.S. GAAP and the SEC - Supplemental oil and gas information for the exploration and production activities - Oil and natural gas reserves. Enis net proved reserves of hydrocarbons at 31 December 2005 were 6,837 million boe (oil and condensates 3,773 million barrels; natural gas 3,064 million boe) decreasing 381million boe from 31 December 2004, due to an estimated 478 million boe adverse entitlement impact in certain PSAs and buy-back contracts resulting from higher oil prices (Brent price was 40.47 dollars/barrel at 31 December 2004 and 58.205 dollars/barrel at 31 December 2005). Excluding the adverse price impact, the reserve replacement ratio was 115% (40% taking account of the price impact). The average reserve life index is 10.8 years (12.1 at 31 December 2004).

Evolution of proved reserves in the year (million boe)

| Net proved reserves at 31
December 2004 — Revisions, extensions and discoveries and
improved recovery | 625 | | 7,218 | |
| --- | --- | --- | --- | --- |
| Production for the year | (634 | ) | (9 | ) |
| | | | 7,209 | |
| Purchase of proved property | | | 106 | |
| Price impact in PSAs and buy-back contracts | | | (478 | ) |
| Net proved reserves at 31
December 2005 | | | 6,837 | |

Additions to proved reserves booked in 2005 were 625 million boe, before the adverse price impact on PSAs and buy-back contracts (478 million boe). Including the adverse price impact additions were 147 million boe and derived from: (i) extensions and discoveries (156 million boe) in particular in Nigeria, Norway, Kazakhstan and Algeria; (ii) improved recovery (89 million boe) in particular in Algeria, Angola and Kazakhstan. These increases were offset in part by net downward revisions of 98 million boe mainly in Kazakhstan, Angola and Libya in connection with the price impact. Upward revisions were registered in Algeria, Norway and Congo. A total of 106 million boe of proved reserves were purchased in Kazakhstan, Australia, Italy and Angola. At 31 December 2005, proved developed reserves amounted to 4,306 million boe (oil and condensates 2,350 million barrels, natural gas 1,956 million boe) or 63% of total proved reserves (60% as of 31 December 2004). Proved reserves of hydrocarbons applicable to long-term supply agreements with foreign governments in mineral assets where Eni is operator represented approximately 11% of all proved reserves at 31 December 2005 (10% at 31 December 2004).

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Mineral right portfolio and exploration activities As of 31 December 2005, Enis portfolio of mineral rights consisted of 1,041 exclusive or shared rights 3 for exploration and development in 34 countries on five continents for a total net acreage of 266,000 square kilometers 4 (234,180 at 31 December 2004). Of these, 55,098 square kilometers concerned production and development (41,997 at 31 December 2004). Outside Italy net acreage increased by 41,403 square kilometers mainly due to the acquisition of assets after international bid procedures in Libya, Egypt, India, Pakistan, Angola, Algeria, the United States and Ireland and purchases of mineral assets in Nigeria, Alaska and Australia. These increases were offset in part by releases in particular in Italy, Brazil, Congo, Morocco and Tunisia and divestments of assets in the British section of the North Sea. In Italy net acreage declined by 9,582 square kilometers due to releases. A total of 52 new exploratory wells were drilled (21.8 of which represented Enis share), as compared to 66 exploratory wells completed in 2004 (29.5 of which represented Enis share). Overall success rate was 39.3% as compared to 52.1% in 2004; the success rate of Enis share of exploratory wells was 47.4% as compared 57.3% in 2004. Production In 2005 oil and natural gas production was 1,737,000 boe/day, up 113,000 boe from 2004, or 7%. This increase was 9% without taking into account the price effect on PSAs and buy-back contracts. Production increases were registered in particular in Libya, Angola, Iran, Algeria, Egypt and Kazakhstan. These increases were partly offset by: (i) lower production entitlements (down 32,000 boe/day) in PSAs and buy-back contracts

| (3) | Of these, 5
exploration permits are owned through joint ventures. |
| --- | --- |
| (4) | Of these 27,422 square
kilometers are owned through joint ventures. |

Net proved hydrocarbon reserves (1) (2) (million boe) 2003 2004 2005 Change % Ch.

Italy	996	890	868	(22	)	(2	)
oil and condensates	252	225	228	3		1
natural
gas	744	665	640	(25	)	(4	)
North Africa	2,024	2,117	2,047	(70	)	(3	)
oil and
condensates	1,080	993	979	(14	)	(1	)
natural gas	944	1,124	1,068	(56	)	(5	)
West
Africa	1,324	1,357	1,285	(72	)	(5	)
oil and condensates	1,038	1,056	942	(114	)	(11	)
natural
gas	286	301	343	42		14
North Sea	912	807	758	(49	)	(6	)
oil and
condensates	529	450	433	(17	)	(4	)
natural gas	383	357	325	(32	)	(9	)
Rest of
World	2,016	2,047	1,879	(168	)	(8	)
oil and condensates	1,239	1,284	1,191	(93	)	(7	)
natural
gas	777	763	688	(75	)	(10	)
Total	7,272	7,218	6,837	(381	)	(5	)
oil and condensates	4,138	4,008	3,773	(235	)	(6	)
natural gas	3,134	3,210	3,064	(146	)	(5	)

| (1) | From 1 January 2004 in
order to conform to the practice of other international
oil companies, Eni unified the conversion rate of natural
gas from cubic meters to boe. A conversion rate of
0.00615 barrels of oil per one cubic meter of natural gas
was adopted. The change introduced did not affect the
amount of proved reserves recorded in boe at 31 December
2003. |
| --- | --- |
| (2) | ncludes
Enis share of proved reserves of equity-accounted
entities (41 million boe in 2005). |

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resulting from higher international oil prices; (ii) declines in mature fields mainly in Italy (natural gas) and the United Kingdom; (iii) the effect of the divestment of assets in 2004 (down 16,000 boe/d) and of hurricanes in the Gulf of Mexico (down 10,000 boe/d). The share of production outside Italy was 85% (83.3% in 2004). Production of oil and condensates (1,111,000 barrels/d) was up 77,000 barrels from 2004, or 7.4%, due to increases registered in: (i) Angola, due to full production of the Hungo and Chocalho fields within phase A of the development of the Kizomba area in Block 15 and the start-up of the Kissanje and Dikanza fields within phase B of the same project in Block 15 (Enis interest 20%) and the start-up of the Sanha-Bomboco fields in area B of Block 0 (Enis interest 9.8%); (ii) Libya, due to full production at the onshore Wafa field and the start-up of the offshore Bahr Essalam field within the Western Libyan Gas Project (Enis interest 50%); (iii) Iran, due to full production at the South Pars field Phases 4-5 (Eni operator with a 60% interest) and production increases at the Dorood (Enis interest 45%) and Darquain fields

Hydrocarbon production (1) (2) (thousand boe/d) 2003 2004 2005 Change % Ch.

Italy	300	271	261	(10	)	(3.7	)
oil and condensates	84	80	86	7		7.5
natural
gas	216	191	175	(16	)	(8.4	)
North Africa	351	380	480	100		26.3
oil and
condensates	250	261	308	47		18.0
natural gas	101	119	172	53		44.5
West
Africa	260	316	343	27		8.5
oil and condensates	236	285	310	25		8.8
natural
gas	24	31	33	2		6.5
North Sea	345	308	283	(25	)	(8.1	)
oil and
condensates	235	203	179	(24	)	(11.8	)
natural gas	110	105	104	(1	)	(1.0	)
Rest of
World	306	349	370	21		6.0
oil and condensates	176	205	228	23		11.2
natural
gas	130	144	142	(2	)	(1.4	)
Total	1,562	1,624	1,737	113		7.0
oil and
condensates	981	1,034	1,111	77		7.4
natural gas	581	590	626	36		6.1

| (1) | Includes
natural gas consumed in operations (44,000, 38,000 and
26,000 boe/day in 2005, 2004 and 2003 respectively). |
| --- | --- |
| (2) | Includes Enis share
of production of equity-accounted entities. |

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(Eni operator with a 60% interest); (iv) Algeria, due to full production at the Rod and satellite fields (Eni operator with a 63.96% interest); (v) Kazakhstan, in the Karachaganak field (Eni co-operator with a 32.5% interest) due to increased exports through the Caspian Pipeline Consortiums pipeline linking the field to the Novorossiysk terminal on the Russian coast of the Black Sea; (vi) Italy, due to increased production in Val dAgri resulting from full production of the fourth treatment train of the oil center. These increases were partly offset by declines of mature fields in particular in the United Kingdom and by the effect of the divestment of assets carried out in 2004. Production of natural gas (626,000 boe/d) was up 36,000 boe from 2004, or 6.1%, reflecting primarily increases registered in Libya, due to full production at the Wafa field and the start-up of the Bahr Essalam field (Enis interest 50%), Egypt, for the start-up of the Barboni field and the Temsah 4 platform in the offshore of the Nile Delta, Kazakhstan and Pakistan. These increases were offset in part by the declines registered in particular in Italy due to declining mature fields, the effect of the divestment of assets effected in 2004 and of the hurricanes in the Gulf of Mexico. Oil and gas production sold amounted to 614.9 million boe, up 37 million boe, or 6.4%. The 19.3 million boe difference over production was due essentially to own consumption of natural gas (16.2 million boe). About 68% of oil and condensate production sold (402.6 million barrels) was destined to Enis Refining & Marketing segment (70% in 2004). About 44% of natural gas production sold (34.5 billion cubic meters) was destined to Enis Gas & Power segment (40% in 2004). Main exploration and development projects NORTH AFRICA Algeria Exploration activities yielded positive results in permits P 404 in area C (Enis interest 25%) near the HBNE field with the SFSW-3 appraisal well on the Sif Fatima discovery and P 403 c/e (Enis interest 33.33%) with the ZNNW-1 appraisal well. In both permits the presence of hydrocarbons was confirmed at a depth of about 3,000 meters. In Block P 403a/d (Enis interest 50%) the NFW ROM-6 discovery well and the ROM North-1 appraisal well were drilled at a depth of about 3,400 meters and confirmed the extension of the new oil levels in the ROM field. The

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ROM integrated development project entails production from these new levels also through the reinjection of gas produced in the nearby BRN field, reducing gas flaring by nearly 90%. Peak production at ROM is expected at 31,000 barrels/day (16,000 net to Eni) in 2009. The EKT, EMK, EMN and EME fields are in the development phase in block 208 (Enis interest 12.25%). The development plan provides for the drilling of 142 wells and the construction of a central facility for the production of stabilized oil, condensates and LNG. Startup is expected in 2008 with peak production of 155,000 barrels/day (13,000 net to Eni) in 2010. Egypt Exploration yielded positive results in the following concessions: (i) Ashrafi (Enis interest 50%) in the Gulf of Suez with the drilling of the NFW Ashrafi 1X well that found hydrocarbons at a depth of 1,600-1,700 meters; (ii) Belayim Land (Enis interest 50%) with the drilling of NFW BLSW-1 well that found gas at a depth of over 3,000 meters; (iii) Belayim Marine (Enis interest 50%) in the Gulf of Suez with the drilling of the BMNW-4 outpost well which allowed to report mineralized levels at a depth of about 3,000 meters. This well was linked to the existing production facilities; (iv) North Port Said (Eni operator with a 50% interest) with the drilling of the PFM-D-1 well which found gas and condensates at a depth of about 5,000 meters. This well is the first discovery of a new exploration theme in oligocenic formations and starts a new exploration phase in deep water with very high mineral potential. Development activities are underway in concessions in the offshore of the Nile Delta: (i) North Port Said (Enis interest 50%) where the Barboni gas platform started production in May 2005 at an initial level of about 1 million cubic meters/day while work continued for the expansion of the el Gamil terminal where in 2005 natural gas production net to Eni increased from 11 to 13 million cubic meters/day; (ii) el Temsah (Eni operator with a 25% interest) where in August 2005 gas and liquid production started at the Temsah 4 platform. In the second quarter of 2006 production of gas and condensates will start from platform Temsah NW. Peak production at 139,000 boe/day (41,000 net to Eni) is expected in 2008. Libya In October 2005 following an international bid procedure Eni obtained an exploration license as operator of 4 onshore blocks with a total acreage of 18,221 square kilometers, located in the Murzuk basin (161/1, 161/2&4, 176/3) and in the Kufra area (186/1, 2, 3, 4). Exploration yielded positive results in offshore block NC-41 (Eni operator with a 50% interest) with the drilling of well NFW T1-NC41 which found oil and gas at a depth of 2,770 meters and yielded 4,600 barrels/day of oil and 370,000 cubic meters/day of gas in test production. As part of the Western Libyan Gas project (Enis interest 50%), less than one year after the start-up of the onshore Wafa field, the Bahr Essalam field located in the NC-41 permit in the Mediterranean offshore started production. The field is developed by means of the Sabratha platform to which 38 producing wells will be connected, of these 26 have already been drilled. Oil and gas are carried through two underwater pipelines to the Mellitah treatment plant on the Libyan coast. Peak production from the two fields at 256,000 boe/day (128,000 boe/day net to Eni) is expected in 2006. Natural gas is carried to Italy through the Greenstream pipeline. When fully operational in 2007 the gasline will allow the export and sale of 8 billion cubic meters per year (4 billion net to Eni) to third parties on the Italian natural gas market under long term contracts. In addition 2 billion cubic meters of gas per year will be sold on the Libyan market. In the NC-174 permit (Enis interest 23.33%) about 800 kilometers south of Tripoli the development of the

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Elephant oil field continued. In October 2005 the new 725-kilometer long pipeline linking it to the Mellitah plant started operations. The upgrading of the Mellitah plant will be completed in the first half of 2006. The field is expected to reach a peak production of 150,000 barrels/day (35,000 net to Eni) in the second half of 2006. WEST AFRICA Angola Offshore exploration activities were successful in the following areas: (i) Block 0, former Cabinda (Enis interest 9.8%) with the NFW 70-5X well that found hydrocarbons at a depth of 2,335 meters and yielded 2,000 barrels of oil/day and natural gas in test production; (ii) Block 14K/A-IMI (Enis share 10%) with the drilling of the Lianzi-2ST and Lianzi-2OH appraisal wells on the Lianzi discovery which showed the presence of natural gas and oil layers at a depth of more than 3,000 meters; (iii) Block 15 (Enis interest 20%) with the Batuque-3 appraisal well on the Batuque discovery which confirmed the presence of hydrocarbons at a depth of about 2,000 meters. Between January and May 2005 in area B of Block 0 former Cabinda (Enis interest 9.8%) production started at the oil, condensate and LPG offshore fields North Sanha and Bomboco. LPG is produced through an FPSO (Floating Production Storage Offloading) unit, the largest in its class in the world. At Sanha a complex for the reinjection of gas into the fields has been built aiming at reducing gas flaring by 50%. Peak production of oil, condensates and LPG is expected at 100,000 barrels/day (10,000 barrels/day net to Eni) in 2007. The project is underway for the development of the Benguela, Belize, Lobito and Tomboco oilfields at a depth between 300 and 500 meters in Block 14 (Enis interest 20%). The project provides for the drilling of 50 wells and the installation of a compliant tower with production facilities for Benguela/Belize. The first oil was produced in January 2006. Lobito and Tomboco will be developed by means of underwater completion and are going to be connected to the compliant tower of Benguela/Belize with start-up scheduled in the second half of 2006. Peak production from the four fields is expected in 2008 at 188,000 barrels/day (32,000 net to Eni). In July, as part of Phase B of the development of discoveries in the Kizomba offshore area in Block 15 (Enis interest 20%) the Kissanje and Dikanza fields were started up five months ahead of schedule at a water depth between 1,000 and 1,300 meters. The project provides for the drilling of 58 wells (34 producing and 24 injection), the installation of a Tension Leg Platform for Kissanje and an underwater production system for Dikanza. Production will be treated at an FPSO vessel common to both fields with a capacity of 250,000 barrels/day and a storage capacity of over 2 million barrels. Production peaked at 47,000 barrels/day net to Eni at year end 2005.

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Nigeria In September 2005 Eni acquired as operator the OML 120 and OML 121 development licenses from Nigerian companies. The concessions, where the Oyo field was discovered, are located approximately 70 kilometers offshore the western coast of the Niger Delta in Nigeria. Two exploration wells are going to be drilled in 2006. Exploration yielded positive results in the offshore OML 125 block (Eni operator with a 50.2% interest) with the drilling of the Abo 8 appraisal well that found oil layers at a depth of 2,142 meters and in the offshore OPL 219 block (Enis interest 12.5%) with the drilling of the Bolia 3X appraisal well that found oil levels at a depth of over 3,000 meters. As part of the plan for increasing the treatment capacity of the Bonny liquefaction plant (Enis interest 10.4%) the an FPSO vessel connected to 17 producing wells (9 already drilled). Production is expected to peak at 200,000 barrels/day (23,000 net to Eni) in 2006. The Forcados/Yokri oil and gas fields (Enis interest 5%) are currently under development in the onshore and offshore of the Niger Delta. Development is expected to be completed in February 2007 as a part of the integrated associated gas gathering project aimed at providing natural gas supplies to the Bonny liquefaction plant. Offshore production facilities have been installed and 25 of the planned 30 wells have been drilled. Peak production from these fields at 126,000 boe/day (6,000 net to Eni) is expected in 2006. In April 2005, the Okpai power station (Independent Power Plant, Enis interest 20%) started operations, with

fourth and fifth treatment trains started operations in November and December 2005, respectively. When fully operational these trains will increase production capacity from 9 to 17 million tonnes/year of LNG (from 11.5 to 23 billion cubic meters/year of natural gas feedstock). When the two new trains are fully operational supplies of natural gas will reach 65 million cubic meters/day (6.25 million cubic meters/day being Enis share). In November 2005 the Bonga oil field (Enis interest 12.5%), situated in the OML 118 permit offshore Nigeria in waters of a depth between 950 and 1,150 meters, was started up. Development is achieved by means of a generation capacity of 480 megawatts on two gas and one steam turbines. The power station is fed with gas from the nearby Kwale fields in permit OML 60 (Eni operator with a 20% interest) which will supply 2 million cubic meters/day of natural gas when the power station is fully operational. The project is part of Enis and the Nigerian governments plan to reduce CO 2 emissions in the atmosphere.

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NORTH SEA Norway In the PL229 permit (Enis interest 65%), where the Goliath discovery was made, Eni obtained an extension of its exploration license to 15 May 2007. Exploration was successful with the drilling of the 7122/7-3 appraisal well on the Goliath discovery that reached a depth of 2.701 in waters 343 meters deep and found a hydrocarbon bearing layer 180 meters thick. A new appraisal of the Goliath area through the drilling of other wells is planned aimed at starting the commercial development of the field. In November 2005 production started at the Kristin oil and gas field (Enis interest 8.25%) located in the PL134 permit in the Haltenbanken area about 200 kilometers off the coast in the Norwegian Sea. Oil production is treated on a semi-submersible platform with a capacity exploiting synergies with the nearby Norne production facilities. Production is expected to peak at 56,000 barrels/day (6,000 net to Eni) in 2006. United Kingdom In July 2005 Eni divested some exploration assets located in the central section of the North Sea. Exploration yielded positive results in the P/233 permit in blocks 15/25a (Enis interest 12%) in the central section of the North Sea with the NWF 15/25°-DD well drilled at a depth of over 2,000 meters and flowed about 4,000 barrels/day of high quality oil and natural gas in test production. In November 2005 the British government announced that it will increase income taxes by levying a supplementary charge increase of 10 percentage points

of 125,000 barrels/day. Production is expected to peak at 218,000 boe/day (18,000 net to Eni) in 2007. In the same permit the Tofte formation discovered with the first producing well on Kristin will be developed. The synergies with the Kristin production facilities will allow a viable development of the nearby Tyrihans field (Enis interest 7.9%), expected to start-up in 2009, in coincidence with the expected production decline of Kristin. In November 2005 the Svale and Stær oil fields in the PL128 permit (Enis interest 11.5%) were started up, (from 10 to 20%). This will adversely impact the Eni Groups tax rate by estimated 1.2 percentage points in 2006 as compared to 2005. Approximately half of the expected increase will relate to a provision for deferred taxation. Given the expected production decline of the area, the adverse impact of higher rates of taxes in the United Kingdom will diminish with time. REST OF WORLD Alaska In August 2005, Eni purchased from the US independent company Armstrong Oil & Gas 104 exploration blocks onshore in the North Slope and offshore in the Beaufort Sea. The blocks, with a total acreage of 1,718 square kilometers, include two fields in

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the pre-development phase holding estimated 170 million barrels of oil of reserves. Australia Offshore exploration was successful in: (i) Block AC/P-21 (Enis interest 40%) with the NFW Vesta-1 well that located natural gas at a depth of over 3,300 meters; (ii) Block WA-25-L (Enis interest 65%) with the Woollybutt-4 appraisal well which confirmed the presence of oil in the western extension of Wollybutt-3 at a depth of over 2,000 meters; (iii) Block WA-208 P (Enis interest 18.66%) with the NFW Hurricane-1 well that identified natural gas at a depth of over 3,000 meters. In December 2005 Eni purchased further interests and reached 100% in permits WA 279-P and WA 313-P in the Bonaparte offshore basin off the northern coast of Australia where the Blacktip and Penguin fields are located. In the same basin Eni purchased a 39% interest in the WA 34-R permit where the Rubicon-Prometeus field is located. In December 2005 Eni signed Heads of Agreement with the Darwin Power and Water Utility Company for the supply of a total amount of 20 billion cubic meters of natural gas from the Blacktip field for a 25-year period starting in January 2009. Further volumes may be supplied in the future. Brazil In January 2006 following an international bid procedure held in October 2005 Eni acquired the operatorship of a six-year exploration license in Block BM Cal-14, covering an area of about 750 square kilometers in the deep waters of the Camamu-Almada basin, about 1,300 kilometers north of Rio de Janeiro. In March 2005 the exploration license of Block BM-C-3 (Enis interest 40%) has been converted into an appraisal area. The test phase of the Peroba discovery well containing oil is scheduled within the first half of 2006. Exploration yielded positive results in Block BM-S-4 (Enis interest 100%) with the drilling of the NFW Belmonte-1A well which found natural gas at a depth of over 5,000 meters. The relevant authorities allowed a third exploration period for this block which will last two years and provides for the drilling of one well. China Offshore exploration activity yielded positive results in Block 16/19 (Enis interest 33%) in the South China Sea about 180 kilometers south east of Hong Kong with the drilling of the HZ25-4-1 well (Enis interest 100%), which found hydrocarbons at a depth of about 4,000 meters and flowed about 5,000 barrels/day of high quality oil in test production. The HZ25-4 field will be started up by means of the production facilities existing in the area. In Block 16/19 the HZ25-3-2 appraisal well confirmed the extension of the reserves of the HZ25-3 oil field. India In July 2005, Eni has been awarded the right to conduct exploration activities as operator in Blocks 8 and D-6, following an international bid tender. Block 8 (Enis interest 34%) is located onshore in Rajasthan in the northwest of India, and extends for 1,335 square kilometers. Block D-6 (Enis interest 40%) is located deepwater in the Indian Ocean, some 130 kilometers west of the Andaman Islands, and covers an area of 13,110 square kilometers. This contract marks the beginning of Enis upstream activities in India. In September 2005 Eni and the Indian Oil & Natural Gas Corporation signed a memorandum of understanding establishing mutual cooperation between the companies aimed at finding new exploration and production opportunities. In particular, the companies will exchange information on a range of deep offshore exploration projects in India and in other countries, with an option to exchange equity interests in selected upstream and midstream projects. Indonesia Offshore exploration activity yielded positive results in the Bukat block (Eni operator with a 41.25% interest) in the Tarakan basin offshore Borneo with the drilling of appraisal wells on the Aster oil discovery made in 2004. The Aster 2 and 3 wells confirmed the presence of additional reserves of high quality hydrocarbons and the exploration potential of the

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basin. In 2006 and 2007 further appraisal activities are scheduled in order to reach a definition of the fields development plan. Iran In January 2005, at Assaluyeh on the coast of the Persian Gulf construction of the gas treatment plant for phases 4 and 5 of the development of the gas and condensates South Pars field was completed. The field is operated by Eni with a 60% interest through a buy-back contract. When fully operational in 2006 the treatment plant will produce 20 billion cubic meters/year of natural gas and over 90,000 barrels/day of condensates (33,000 net to Eni). In the short term it will also produce 1 million tonnes/year of LPG. Kazakhstan As part of the North Caspian Sea PSA for the development of the Kashagan field where Eni is operator, on 31 March 2005 Eni and the other members of the consortium, except for one, purchased British Gass interest (16.67%) in proportional shares, according to the option exercised in May 2003, and sold half of this newly acquired interest to the national Kazakh company Kazmunaygaz (KMG), new partner in the PSA with an 8.335% interest. Following these two transactions (the sale to KMG was closed in May 2005), Eni increased its interest from 16.67% to 18.52% and continues acting as operator. The outlay for this transaction amounted to dollar 200 million. The development plan of the Kashagan field, considered the most important discovery of the past thirty years, to be implemented in multiple phases, aims at the production of up to 13 billion barrels of oil reserves by means of partial reinjection of gas. Production is expected to start in 2008 at an initial level of 75,000 barrels/day and to increase to 450,000 barrels/day at the end of the first development phase. Production plateau is targeted at 1.2 million barrels/day. The total capital expenditure is estimated at dollar 29 billion (5.4 billion being Enis share), this amount does not include the capital expenditure for the construction of the infrastructure for exporting production to international markets, for which various options are under scrutiny by the consortium. At 31 December 2005, the total amount of contracts awarded for the development of the field was over dollar 8.8 billion for the completion of the first phase of the fields development plan (sections 1 and 2) which includes the drilling of development wells, the construction of infrastructure for developing the field and for offshore production (drilling, treatment and reinjection of sour gas for maximizing the oil yield) and onshore treatment plants. The most advanced techniques are going to be applied in the construction of the planned plants in order to cope with high pressures in the field and the presence of hydrogen sulphide. At the Karachaganak field (Eni co-operator with a 32.5% interest) the new gas treatment and injection plants allowed to ship 42,500 barrels/day net to Eni, corresponding to 41.7% of oil and gas produced by the field net to Eni, to the terminal of the North Caspian Pipeline Consortium (Enis interest 2% corresponding to a transport right of a maximum of 3 million tonnes/year) at Novorossiysk on the Black Sea. The Phase 2M (Maintenance) of the Karachaganak project continued according to plans.

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Mozambique In March 2006, following an international bid tender, Eni obtained the exploration license for Area 4, located in the deep offshore of the Rovuma Basin 2,000 kilometers north of Maputo. The block covers an area of 17,646 square kilometers in an unexplored geological basin with great mineral potential according to surveys performed. Pakistan Eni purchased the Indus M and Indus N exploration permits in the offshore of the Indus Delta with a total area of 5,000 square kilometers. The Rehmat non operated field (Enis interest 30%) was started-up. In May 2005 in the Gambat permit the Dulyan-1-Reentry well was drilled and confirmed the presence of natural gas. After the completion of production tests, evaluations are underway. Turkey In November 2005 an agreement has been reached for the preparation of a feasibility study on the development of a new oil pipeline connecting the Turkish port of Samsun, on the Black Sea, with Ceyhan, on Turkeys Mediterranean coast. The new transportation system will include: (i) a new loading terminal in Samsun; (ii) a 560-kilometer long pipeline with transport capacity of 1 million barrels of oil per day; (iii) oil storage facilities to be built in Ceyhan. The construction of a pipeline represents a faster, environmentally safer and more economic alternative to the transportation of oil by ship through the Turkish Straits of the Bosphorus and Dardanelles. It also represents a good route for exporting Enis production from fields in the Caspian Sea area. United States Eni purchased 22 exploration blocks in the Gulf of Mexico following its participation to the 194 (March 2005) and 196 (August 2005) Lease Sale. In Green Canyon Block 562 (Eni operator with an 18.17% interest) in the deep offshore of the Gulf of Mexico production from the K2 oil field started with an initial flow rate of 8,000 boe/day. The fields development includes two additional subsea wells linked to the nearby Marco Polo platform, operated by a partner. Peak production of 7,000 boe per day (net to Eni) is expected in 2007. Venezuela The development of the Corocoro oil field (Enis interest 26%) in the West Paria Gulf is underway. The development plan provides for two phases, with the second one depending on the results of the first one in terms of production from wells and reaction of the field to water and gas reinjection. Production is expected to start in 2008 with a peak of about 70,000 barrels/day (17,000 net to Eni) in 2009. In December 2005 Eni signed a transition agreement with the Venezuelan state company PDVSA under which the parties agreed to negotiate the terms for a transition to the new contractual regime of the empresa mixta, a new company to which titles and mineral assets of the DaciÓn filed will be transferred with PDVSA holding the majority stake. Until the closing

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of the new contractual regime, Enis activities will be subject to the terms and conditions of the existing Operating Service Agreement. Negotiations are underway and currently it is not possible to foresee their outcome. ITALY In Italy development activities concerned in particular: (i) continuation of the development plan of the onshore Candela and Miglianico fields and the completion of the development of the Naide field; (ii) continuation of drilling and connection of development wells in the Val dAgri; (iii) the optimization of producing fields by means of sidetracking and infilling (the Annabella, Armida, Barbara, Garibaldi gas fields and the Rospo oilfield); (iv) construction of an additional sealine for the optimal management of the fields connected to the Fano terminal; (v) the beginning of the development phase of the Annamaria field. As part of the development of onshore gas fields in Sicily the following projects are in an advanced phase: (i) Pizzo Tamburino, the first PT1 well is scheduled for the second half of 2006 with expected production of approximately 1,000 boe/day; in 2007 according to the actual production of PT1 a second well PT2 is expected to be connected to PT1; (ii) Fiumetto, the infilling well F4 is going to start production in the first half of 2007 with an expected peak flow of approximately 1,200 boe/day; (iii) Samperi 1, startup is expected in the second half of 2006 peaking at approximately 1,300 boe/day. Exploration expenditure concerned essentially northern Italy where the drilling of 3 wells began (2 completed before year end, 6 completed in 2004). Exploration yielded positive results with the Mezzocolle 1 well (Enis interest 100%) containing natural gas in the Imola permit in the central Apennines. In December 2005 Eni acquired for euro 90 million (including net financial debt transferred of euro 17 million) a 90% interest in Sarcis SpA holding onshore permits/concessions in Sicily from Ente Minerario Siciliano in liquidation. Capital expenditure In 2005, capital expenditure of the Exploration & Production segment amounted to euro 4,964 million and concerned mainly development expenditure (euro 3,952 million, euro 4,310 in 2004) directed mainly outside Italy (euro 3,541 million), in particular in Kazakhstan, Libya, Angola and Egypt. Development expenditure in Italy (euro 411 million) concerned in particular the completion of work for plant and infrastructure in Val dAgri and sidetrack and infilling actions in mature areas. Exploration expenditure amounted to euro 656 million (euro 499 million in 2004), of which about 96% was directed outside Italy. Outside Italy exploration concerned in particular the following countries: Norway, Egypt, the United States, Brazil and Indonesia. In Italy exploration concerned essentially Northern Italy. Expenditure for the purchase of proved and unproved property amounted to euro 301 million and concerned: (i) a further 1.85% stake in the Kashagan project with an outlay of dollar 200 million; (ii) 104 exploration blocks and two fields in the pre-development phase in Northern Alaska; (iii) a 40% stake in the OML 120 and OML 121 concessions under development in the Nigerian offshore; (iv) a 50% interest in the WA-313-P and a 53.8% interest in the WA-280-P permits in Australia. Capital expenditure for capital goods amounted to euro 55 million.

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Storage Natural gas storage activities are performed by Stoccaggi Gas Italia SpA (Stogit) to which such activity was conferred on 31 October 2001 by Eni SpA and Snam SpA, in compliance with article 21 of Legislative Decree No. 164 of 23 May 2000, which provided for the separation of storage from other activities in the field of natural gas. Storage services are provided by Stogit through eight storage fields located in Italy, based on ten storage concessions 5 vested by the Ministry of Productive Activities. In 2005 Stogit increased the share of storage capacity used by third parties that reached 56% (53% in 2004). From the beginning of its operations Stogit markedly increased the number of customers served and the share of revenues from third parties: from a nearly negligible amount, the latter accounted for 44% of total revenues in 2005.

(5) Two of these are not yet operational.

2002 2003 2004 2005

| Available capacity — modulation
and mineral | (billion cubic meters) | 7.1 | 7.1 | 7.5 | 7.5 |
| --- | --- | --- | --- | --- | --- |
| - share utilized by Eni | (%) | 66 | 53 | 47 | 44 |
| strategic | (billion cubic meters) | 5.1 | 5.1 | 5.1 | 5.1 |
| Total customer | (units) | 20 | 30 | 39 | 44 |
| Modulation
and mineral service customer | (units) | 14 | 24 | 29 | 35 |

Regulatory framework Decision No. 119/2005 Adoption of guarantees for the free access to natural gas storage services, duties of subjects operating storage activities and rules for the preparation of a storage code Decision No. 119/2005 defines the criteria for the preparation of a storage code regulating the provision of modulation, mineral and strategic storage services as well as the service for the operating balancing of transport enterprises; services are provided to users for a period no longer than a thermal year following a preset priority rule. The decision determines the publication and communication duties to the Authority for electricity and gas and to users of storage services. Decision No. 266/2005 Notice of formal inquiry on Stogit SpA leading to a possible administrative sanction With Decision No. 266/2005 the Authority for electricity and gas started an inquiry leading to a possible administrative sanction (fine under Law No. 481/1995) alleging that Stogits behavior does not conform with the discipline contained in Decision No. 119/2005 concerning access to and provision of storage services. Decision No. 50/2006 Criteria for the determination of tariffs for natural gas storage services On 3 March 2006, the Authority for electricity and gas published a decision containing the criteria for determining storage tariffs for the second regulated period. This decision changes the regulation in force in the first regulated period, introducing maximum allowed revenues affecting the capacity component (space and flow) and confirming the price cap mechanism for the commodity component. It also establishes a single national tariff. The decision confirms the mechanisms for the evaluation of net capital employed already defined for the first regulated period; the return on capital employed is reduced from 8.33% to 7.1% (pre-tax).

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Based on the new tariff regime and keeping into account that all the capacity available in 2006 is considered in the calculation of tariffs, revenues expected in the thermal year from 1 April 2006 to 31 March 2007 amount to about euro 280 million, decreasing 20% from the previous thermal year. The decision contains also incentives to capital expenditure for the development of storage by recognizing an additional rate of return of 4% on the basic rate for 8 years for capital expenditure increasing capacity and for 16 years for the development of new storage sites. The decision changes some of the rules contained in Decision No. 119/2005, in particular it confers injection capacity and the attribution to customers of the working gas remaining at the end of the discharge, it also totally modifies the rules for the revenues balancing and use of strategic storage. Decision No. 56 of 16 March 2006 approved Stogits tariff proposals for 2006-2007 thermal year.

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Gas & Power

(million euro) 2004 2005

Revenues (1)		17,302	22,969
Operating
profit		3,428	3,321
Replacement cost operating profit		3,416	3,194
Adjusted
operating profit		3,448	3,531
Capital expenditure		1,451	1,152
Employees
at period end	(units)	12,843	12,324

(1) Before elimination of intersegment sales.

Natural gas sales (91.15 billion cubic meters) were up 8.8% due to increased demand for power generation in Italy and the acquisition of new customers combined with growth in markets in the rest of Europe as a result of the expansion strategy pursued by Eni

The agreement signed by Eni, Amorim Energia and Rede Eléctrica Nacional shareholders of Galp with 33.34, 13.312 and 18.30% respectively confers stability to the shareholding structure of the Portuguese energy company and sets the stage for future developments aimed at enhancing Enis investment. The Portuguese Government is expected to sell part of its Galp holding through a public offer before the end of 2006

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As part of its strategy of international expansion in LNG, Eni purchased 6 billion cubic meters/year for 20 years of the regasification capacity of the Cameron terminal on the coast of Louisiana in the USA with start-up planned for 2008-2009. This will allow Eni to sell in the United States part of its natural gas reserves in North Africa and Nigeria

Eni continues its development in power generation aimed at reaching 5.5 gigawatt of installed capacity by 2009; at year-end 2005 installed capacity was 4.5 gigawatt. The new combined cycle power plants will absorb over 6 billion cubic meters/year of natural gas from Enis portfolio of supplies

Eni defined the plans for the upgrade of transport capacity of pipelines carrying natural gas from Algeria and Russia. When fully operational in the 2009-2010 thermal year these upgrades will allow an increase in import capacity of about 13 billion cubic meters/year. All the new capacity will be made available to third parties

NATURAL GAS Supply of natural gas In 2005, Enis Gas & Power division supplied 82.56 billion cubic meters of natural gas, with a 6.47 billion cubic meters increase from 2004, up 8.5%, in line with the increase in sales. Natural gas volumes supplied outside Italy (71.83 billion cubic meters) represented 87% of total supplies (85% in 2004). Volumes supplied outside Italy (71.83 billion cubic meters) increased 7.04 billion cubic meters from 2004, or 10.9% due to the reaching of full volumes from Libya (3.29 billion cubic meters) and higher purchases from Algeria (0.72 billion cubic meters). Imports of LNG destined to Italy increased by 0.18 billion cubic meters due to the partial resumption of supplies from Sonatrach after the accident occurred in early 2004 at the Skikda liquefaction plant. Also purchases from Croatia increased (0.08 billion cubic meters) due to the

Supply of natural gas (billion cubic meters) 2003 2004 2005 Change % Ch.

Italy	12.16		11.30		10.73		(0.57	)	(5.0	)
Russia for
Italy	18.92		20.62		21.03		0.41		2.0
Russia for Turkey	0.63		1.60		2.47		0.87		54.4
Algeria	16.53		18.86		19.58		0.72		3.8
Netherlands	7.41		8.45		8.29		(0.16	)	(1.9	)
Norway	5.44		5.74		5.78		0.04		0.7
Libya			0.55		3.84		3.29		n.m.
Croatia	0.65		0.35		0.43		0.08		22.9
United Kingdom	1.98		1.76		2.28		0.52		29.5
Algeria
(LNG)	1.98		1.27		1.45		0.18		14.2
Others (LNG)	0.72		0.70		0.69		(0.01	)	(1.4	)
Hungary	3.56		3.57		3.63		0.06		1.7
Other supplies Europe	0.04		0.12		1.18		1.06		n.m.
Outside
Europe	1.14		1.20		1.18		(0.02	)	(1.7	)
Outside Italy	59.00		64.79		71.83		7.04		10.9
Total
supplies	71.16		76.09		82.56		6.47		8.5
Withdrawals from storage	0.84		0.93		0.84		(0.09	)	(9.7	)
Network
losses and measurement differences	(0.61	)	(0.53	)	(0.78	)	(0.25	)	47.2
Available for sale	71.39		76.49		82.62		6.13		8.0

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start-up of supplies from the Marica field, in the Adriatic offshore in November 2004. Supplies from the Netherlands declined (0.16 billion cubic meters). Supplies in Italy (10.73 billion cubic meters) declined by 0.57 billion cubic meters, or 5.0%, from 2004, due to a decline in production of the Exploration & Production segment. In 2005, a total of 0.84 billion cubic meters of natural gas were withdrawn from storage, net of volumes input into sites of Stoccaggi Gas Italia SpA in Italy and of Gaz de France in France, as compared to 0.93 billion cubic meters in 2004. TAKE-OR-PAY In order to meet the medium and long-term demand for natural gas, in particular of the Italian market, Eni entered into long-term purchase contracts with producing countries that currently have a residual average term of approximately 15 years. Existing contracts, which in general contain take-or-pay clauses, will ensure a total of about 67.3 billion cubic meters of natural gas per year (Russia 28.5, Algeria 21.5, Netherlands 9.8, Norway 6 and Nigeria LNG 1.5) by 2008. The average annual minimum quantity (take-or-pay) is approximately 85% of said quantities. Despite the fact that increasing volumes of natural gas available to Eni are currently being sold outside Italy, the expected development of Italian demand and supply of natural gas in the medium and long-term and the evolution of regulations in this segment represent a risk element in the management of take-or-pay contracts. In 2005 Eni withdrew about 3.8 billion cubic meters more than its minimum offtake obligation. Sales of natural gas In 2005 natural gas sales (91.15 billion cubic meters, including own consumption and Enis share of sales of affiliates 1 ) were up 7.34 billion cubic meters from 2004, or 8.8%. This increase concerned all areas, in particular markets in the rest of Europe (up 3.15 billion cubic meters, or 11.2%), the Italian market (up 2.39 billion cubic meters, or 4.8%) and natural gas supplies for

(1) Including also Nigeria LNG Ltd (Enis interest 10.4%).

Natural gas sales (billion cubic meters) 2003 2004 2005 Change % Ch.

Italy	50.86	50.08	52.47	2.39		4.8
Wholesalers (distribution companies)	15.36	13.87	12.05	(1.82	)	(13.1	)
Gas
release		0.54	1.95	1.41		261.1
End customers	35.50	35.67	38.47	2.80		7.8
Industries	13.17	12.39	13.07	0.68		5.5
Power generation	15.03	15.92	17.60	1.68		10.6
Residential	7.30	7.36	7.80	0.44		6.0
Rest of Europe	17.54	21.54	23.44	1.90		8.8
Outside
Europe	1.09	1.17	1.17	..		..
Total sales to third parties	69.49	72.79	77.08	4.29		5.9
Own
consumption	1.90	3.70	5.54	1.84		49.7
Total sales to third parties and own
consumption	71.39	76.49	82.62	6.13		8.0
Sales
of natural gas of Enis affiliates (net to Eni)	6.94	7.32	8.53	1.21		16.5
Europe	6.23	6.60	7.85	1.25		18.9
Outside
Europe	0.71	0.72	0.68	(0.04	)	(5.6	)
	78.33	83.81	91.15	7.34		8.8

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power generation at EniPowers power stations (up 1.84 billion cubic meters, or 49.7%). Natural gas sales in Italy (52.47 billion cubic meters) were up 2.39 billion cubic meters from 2004, or 4.8%, reflecting an increase in sales to end users, also due to a cold winter, that concerned power generation (up 1.68 billion cubic meters or 10.6%), industries (up 0.68 billion cubic meters or 5.5%) and the residential and commercial segment (up 0.44 billion cubic meters or 6%). These increases were offset in part by lower sales to wholesalers (down 1.82 billion cubic meters or 13.1%) related to the so called gas release 2 carried out in accordance with certain decisions of the Antitrust Authority. Natural gas sales in the rest of Europe (23.44 billion cubic meters) were up 1.9 billion cubic meters, or 8.8%, due to increases registered in: (i) supplies to the Turkish market via the Blue Stream gasline (up 0.86 billion cubic meters); (ii) sales under long-term supply contracts to importers to Italy (up 0.57 billion cubic meters), also due to reaching full supplies from Enis Libyan fields; (iii) France, related to the increase in supplies to industrial customers and to wholesalers (up 0.5 billion cubic meters); (iv) Germany and Austria related to increased supplies (up 0.3 billion cubic meters) to Enis affiliate GVS (Enis interest 50%) and other operators. Own consumption 3 was 5.54 billion cubic meters, up 1.84 billion cubic meters from 2004, or 49.7%, reflecting primarily higher supplies to EniPower due to the coming on stream of new generation capacity. Sales of natural gas by Enis affiliates, net to Eni and net of Enis supplies, were 8.53 billion cubic meters and related to: (i) GVS (Enis interest 50%) with 3.29 billion cubic meters; (ii) Galp Energia (Enis interest 33.34%) with 1.56 billion cubic meters; (iii) UniÓn Fenosa Gas (Enis interest 50%) with 1.52 billion cubic meters; (iv) volumes of natural gas (1.45 billion cubic meters) treated at the Nigeria LNG Ltd liquefaction plant (Enis interest 10.4%) in Nigeria sold to US and European markets. As compared to 2004 sales increased 1.21 billion cubic meters, up 16.5%, in particular due to higher sales by UniÓn Fenosa Gas. Transmission and regasification of natural gas Eni transported 85.10 billion cubic meters of natural gas in Italy, an increase of 4.69 billion cubic meters from 2004, or 5.8%, due to increasing demand related to power generation and higher consumption in the residential and commercial segment due to a cold winter.

| (2) | In June 2004
Eni agreed with the Antitrust Authority to sell a total
volume of 9.2 billion cubic meters of natural gas (2.3
billion cubic meters/year) in the four thermal years from
1 October 2004 to 30 September 2008 at the Tarvisio entry
point into the Italian network. |
| --- | --- |
| (3) | In accordance
with article 19, paragraph 4 of Legislative Decree No.
164/2000, the volumes of natural gas consumed in
operations by a company or its subsidiaries are excluded
from the calculation of ceilings for sales to end
customers and from volumes input into the Italian network
to be sold in Italy. |

Natural gas volumes transported (1) (billion cubic meters) 2003 2004 2005 Change % Ch.

Eni	51.74	52.15	54.88	2.73		5.2
On
behalf of third parties	24.63	28.26	30.22	1.96		6.9
Enel	9.18	9.25	9.90	0.65		7.0
Edison Gas	7.49	8.00	7.78	(0.22	)	(2.7	)
Others	7.96	11.01	12.54	1.53		13.9
	76.37	80.41	85.10	4.69		5.8

(1) Include amounts destined to domestic storage.

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Natural gas volumes transported on behalf of third parties (30.22 billion cubic meters) increased by 1.96 billion cubic meters, up 6.9%. In 2005 Enis LNG terminal in Panigaglia regasified 2.49 billion cubic meters of natural gas (2.07 billion cubic meters in 2004) discharging 79 tanker ships (68 in 2004). The increase in volumes regasified can be attributed to higher availability of liquefied natural gas on the market. Development projects LNG United States As part of its strategy of expansion in the LNG business, on 1 August 2005, Eni signed an agreement with the US company Cameron LNG Llc (belonging to the Sempra Energy group) to purchase a share of the regasification capacity of the Cameron liquefied natural gas terminal under construction in Louisiana expected to be completed in 2008-2009. The share of regasification capacity purchased amounts to 6 billion cubic meters per year for a period of 20 years, which corresponds to about 40% of the overall initial capacity of the terminal (15.5 billion cubic meters per year). This transaction will enable Eni to sell part of its natural gas reserves from North African and Nigerian fields in the United States. LNG Egypt In January 2005, the first LNG shipment was made from the Damietta liquefaction plant (Enis interest 40% through its 50% interest in UniÓn Fenosa Gas) that is targeted to produce about 7 billion cubic meters/year. The partners in the project (UniÓn Fenosa Gas, the Egyptian company EGAS and oil producers Eni and BP) are negotiating terms and conditions for an expansion of the plant consisting in the construction of a second train with the same capacity of the first one. Eni will supply about 3 billion cubic meters/year of natural gas to the first train for twenty years. Further volumes will be supplied to the second train under an intent protocol signed in March 2005 with the Egyptian Government. Galp On 29 December 2005, Eni, Amorim Energia (a privately held Portuguese company in which Sonangol, the national oil company of Angola, holds a minority stake) and Rede Electrica Nacional (REN) entered an eight-year long agreement for the joint management of Galp Energia (Galp). The agreement came in force on 29 March 2006 after the occurrence of all the suspensive conditions, among which: (i) the authorization of the European Commission issued on 24 March 2006; (ii) the purchase on 28 March 2006 of a 1% stake in Galp by Caixa (a primary Portuguese financial institution) which also confirmed its participation in the agreement it had signed on 29 December 2005; (iii) the change in the powers of the Portuguese State in Galp (golden share) resulting from the approval by Galps Shareholders Meeting held on 29 March 2006 of new by-laws consistent with the agreement between Eni, Amorim Energia, REN and Caixa. At the present date shareholders of Galp are: Eni (33.34%), the Portuguese State (17.711%), Parpublica (12.293%), REN (18.30%), Amorim Energia (13.312%), Iberdrola (4%), Caixa Geral de Depositos (1%), Setgas (0.044%). Key guidelines of the agreement are as follows: (i) the establishment of a new set of corporate governance rules setting, among others, percentages of share capital voting rights necessary to make relevant decisions; (ii) an industrial plan targeting the achievement of a leading market position in natural gas, refining and petroleum products marketing in the Iberian Peninsula, an increase in the weight of upstream activities in Galps asset portfolio and access to the Portuguese electricity sector; (iii) placement of part of the stake held by the Portuguese State in Galp through an initial public offering by year-end of 2006; (iv) spin-off of certain regulated asset of Galp (natural gas transport network, storage sites and the Sines LNG regasification plant) ideally by the end of 2006; those assets are agreed to be sold to REN; (v) transfer of RENs stake in Galp to Amorim Energia within an 18-month period from the effective date of the agreement; (vi) a five-year lock-in period. When effective, the agreement will replace the existing agreement between Eni and the Portuguese State. Germany In January 2005, Eni agreed a long term contract for the supply of 1.2 billion cubic meters/year of natural gas to the German company Wingas starting in 2006. The gas will be delivered at Eynatten at the German-Belgian border. France In July 2005 Eni signed a long term agreement with French company EDF for the supply of 860 million cubic meters/year of natural gas starting in October 2006.

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Blue Stream In November 2005 the first section of the compressor station at Dzhubga on the Russian coast of the Black Sea started operating. This station is made up of three turbocompressors and three turbogenerators and will allow to increase volumes transported. The Blue Stream gasline owned by Blue Stream Pipeline Co in which Eni and Gazprom hold equal shares transports natural gas produced in Russia to Turkey across the Black Sea by means of two underwater pipelines each about 390-kilometer long reaching a depth of 2,150 meters. In 2005 the pipeline carried 5.03 billion cubic meters of natural gas (50% were Enis share). Volumes transported and marketed will increase progressively in future years and are targeted to about 16 billion cubic meters per year (8 billion net to Eni). Upgrade of import gaslines Eni has defined a program for the upgrade of transport gaslines from Algeria and Russia. The transport capacity of the TTPC gasline from Algeria will increase by 6.5 billion cubic meters/year of which 3.2 billion cubic meters starting on 1 April 2008 and 3.3 billion cubic meters/year starting on 1 October 2008 with an expected expenditure of euro 345 million. A corresponding capacity on the TMPC downstream gasline is already available. TMPC crosses underwater the Sicily channel. The first section of the upgrade was assigned to third parties in November 2005. The transport capacity of the TAG gasline from Russia will be increased by 6.5 billion cubic meters/year of which 3.2 billion cubic meters starting on 1 October 2008 and 3.3 billion cubic meters/year starting on 1 April 2009 with an expected expenditure of euro 275 million. The first section of the upgrade was assigned to third parties in February 2006. Considering also the full capacity from 2006 of the Greenstream gasline from Libya (8 billion cubic meters/year) and the upgrade underway of the TAG gasline in the light of the build-up of the fourth import contract from Russia (up 4 billion cubic meters/year from 2007), from 2009 a total of about 25 billion cubic meters/year of new import capacity will be available. Except for the 4 billion cubic meters/year of the Russian contract, 14.4 billion cubic meters of this new capacity have already been sold on the market and 6.6 billion cubic meters/year will be sold under non discriminating procedures. Agreement between Eni and Gazprom/Gazexport In October 2005 Eni and Gazprom agreed to promote a new set of agreements aimed at widening their cooperation agreeing also to cease the previous agreement signed in May 2005. (See Enis Report on the first half of 2005, Operating review, Gas & Power). Negotiations are underway. Sale of the water business In March 2005, after receiving the authorization of the Italian Antitrust Authority, Italgas divested its majority interest (67.05%) in Società Azionaria per la Condotta di Acque Potabili to Amga SpA and Smat SpA for a cash consideration of euro 85 million (euro 15.57 per share). In May 2005, after receiving the authorization of the Italian Antitrust Authority, Italgas divested its 100% interest in Acquedotto Vesuviano SpA to Gori SpA for a cash consideration of euro 20 million. The above transactions are part of Enis strategy of concentrating its resources in its core natural gas business. Purchase of Siciliana Gas On 28 December 2005 Eni signed an agreement for the purchase of 50% of Siciliana Gas SpA and one share of Siciliana Gas Vendite SpA held by Ente Siciliano per la Promozione Industriale (ESPI) in liquidation (Sicilys industrial development agency) for euro 98 million. On 1 February 2006 the Italian Antitrust Authority approved the transaction. With this purchase Eni becomes the sole owner of Siciliana Gas SpA and through this company also of 100% of Sicliana Gas Vendite SpA. Siciliana Gas SpA has been operating in Sicily since 1979 and holds the rights for the distribution of gas to 76 Sicilian municipalities, including Agrigento, Enna, Trapani and Gela (of these 70 concessions are operating) through a 2,600-kilometer long network and with 186 employees. It owns Siciliana Gas Vendite SpA operating in the sale of natural gas to end users with approximately 215,000 customers and sales volumes of about 190 million cubic meters per year and 50 employees. Toscana Energia SpA On 24 January 2006, Eni, Italgas and the local authorities partners of Fiorentina Gas SpA and Toscana Gas SpA signed a framework agreement for developing an alliance in the area of natural gas distribution and sale. As part of the agreement, the partners incorporated

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Toscana Energia SpA (Enis interest 48.7% the remaining 51.3% interest being held by municipalities and local banks) to which they contributed in kind their interests in Fiorentina Gas and Toscana Gas. These two companies operate in natural gas distribution to 97 municipalities through a 7,900-kilometer long network serving 1.6 million customers. They will be merged in Toscana Energia within two years under the framework agreement. The local authorities partners will play a role of strategic guidance and control, while Italgas is the industrial partner and has operating and management responsibilities. The agreement provides also for the establishment of a regional sales company (600,000 customers, 1.1 billion cubic meters sold in 147 Tuscan municipalities) under Enis control, through the merger of Toscana Gas Clienti SpA (Enis interest 46.1% through Italgas) and Fiorentina Gas Clienti SpA (Enis interest 100%). Regulatory framework Actions by the Antitrust Authority and the Authority for electricity and gas TTPC On 15 February 2006, the Antitrust Authority informed Eni of the closing of an inquiry started in February 2005 to ascertain an alleged abuse of dominant position. The events leading to the opening of the procedure relate to behaviors of Trans Tunisian Pipeline Co Ltd (TTPC), wholly owned by Eni, concerning its decision to consider expired certain ship-or-pay contracts signed on 31 March 2003 by TTPC with four shippers, who had been assigned new transport capacity on TTPCs pipeline, due to the non occurrence of certain suspensive clauses. Therefore TTPC decided to not proceed to the planned upgrade of the pipeline by 2007. In January 2006 Eni submitted to the Antitrust Authority a proposal containing the actions it intends to perform in order to favor competition on the Italian natural gas market and mitigate the effects if its alleged abuse of dominant position, concerning in particular the upgrade of the TTPC pipeline in Tunisia for the import of natural gas to Italy from Algeria: 3.2 billion cubic meters/year from 1 April 2008 and further 3.3 billion cubic meters/year from 1 October 2008. With the decision notified on 15 February 2006 the Antitrust Authority stated that Enis behavior through its subsidiary TTPC represented an abuse of dominant position under article 82 of the European Treaty. It therefore fined Eni. The original fine amounted to euro 390 million and was reduced to euro 290 million in consideration of Enis commitment to perform actions favoring competition as mentioned above. Eni intends to file a claim against this decision of the Antitrust Authority with the Regional Administrative Court of Lazio. Determination of reference prices for non eligible customers at 31 December 2002 - Decision No. 248/2004 and Decision No. 298/2005 of the Authority for electricity and gas With Decision No. 248 of 29 December 2004, the Authority for electricity and gas changed the indexing mechanism concerning the raw material component in tariffs paid by end customers that were non eligible customers at 31 December 2002 on the basis of Legislative Decree No. 164/2000. Decision No. 248/2004 introduced the following changes: (i) establishment of a cap set at 75% for the changes in the raw material component if Brent prices fall outside the 20-35 dollar/barrel interval; (ii) change of the relative weight of the three products making up the reference index of energy prices whose variations when higher or lower than 5% as compared to the same index in the preceding period determine the updating of raw material costs; (iii) substitution of one of the three products included in the index (a pool of crudes) with Brent crude; (iv) reduction in the value of the variable wholesale component of selling price by euro 0.26 cents per cubic meter in order to foster the negotiation of prices consistent with average European prices in gas import contracts starting from 1 October 2005. Decision No. 248/2004 also obliges suppliers of natural gas to provide new conditions consistent with the said decision to wholesalers under contracts that do not contain price adjustment clauses in case of changes in the pricing mechanisms. Eni filed a claim against Decision No. 248/2004, requesting its suspension with the Regional Administrative Court of Lombardia. With a judgment

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published on 6 October 2005, this Court annulled Decision No. 248/2004 of the Authority for electricity and gas. However the Council of State in response to a counter claim of the Authority suspended the Courts decision. On the basis of this suspension, on 29 December 2005 the Authority published Decision No. 298/2005 containing the conditions for the updating of prices for the January-March 2006 quarter based on the criteria of Decision No. 284/2004. The decision of the Council of State on this matter is pending. Opening of an inquiry on prices With Decision No. 107/2005 the Authority for electricity and gas started a formal inquiry against Eni and other gas importers alleging their failure to comply with the Authority information requirements contained in its Decision No. 188/2004 of 27 October 2004, by which it required natural gas importers, among which Eni, to give information concerning: (i) dates and supplier for each supply contract for the import of natural gas; (ii) FOB purchase prices; (iii) price updating formulas; and (iv) volumes supplied and FOB purchase average prices on a monthly basis for each supplying contract relating to the period October 2002-September 2004. Eni appealed this decision with the Regional Administrative Court of Lombardia that with Decision No. 89/2005 of 22 March 2005 cancelled the obligation for Eni to communicate dates and supplier for each contract and FOB purchase prices. With a letter dated 14 May 2005 and taking into account the Regional Courts decision, Eni gave the Authority only part of the information required; in particular information concerning volumes supplied and FOB purchase average prices on a monthly basis was not provided because it would allow to calculate information on FOB prices the presentation of which was annulled by the Regional Administrative Courts decision. With Decision No. 107/2005 the Authority for electricity and gas confirmed Enis failure to comply with the Authority information requirement and opened an inquiry that is still ongoing. Law 481/1995 states that, when its decisions are disregarded, the Authority may impose a fine ranging from a minimum of euro 25,000 to a maximum of euro 150 million. With an appeal of December 2005, the Authority requested to the Council of State a change in the decision allowing it to know also FOB prices. Eni acted against this claim. The hearing to discuss it has not yet been scheduled.

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Inquiry of the Authority for electricity and gas on behaviors of operators selling natural gas to end customers With Decision No. 225 of 28 October 2005, the Authority for electricity and gas started an inquiry on the behaviors of companies selling natural gas to end customers aimed at acquiring new customers or re-acquiring customers transferred to other sellers, with particular reference to hurdles posed by companies to customers wishing to leave one distributor or to the entry of competitors on the market. The inquiry aims at identifying any measure the Authority should take in this area and is expected to close before 31 July 2006. Eni SpA - GNL Italia SpA On 18 November 2005 the Antitrust Authority notified Eni and its subsidiary GNL Italia the opening of an inquiry, in accordance with article 14 of Law No. 287/1990, concerning an alleged abuse of dominant position in the assignment and use of the total continuos regasification capacity of the Panigaglia terminal (owned by GNL Italia) in thermal years 2002-2003 and 2003-2004, as evidenced by an inquiry of the Authority for electricity and gas which referred Eni to the Antitrust Authority. The inquiry is due to be closed on 31 October 2006. Decision No. 137/2002 of the Authority for electricity and natural gas - Access to transport services and Network Code of Snam Rete Gas The Authority for electricity and natural gas with decision No. 137/2002 defined the criteria for regulating access to national natural gas transport networks, in particular the issue of priority. Eni filed a claim against this decision with the Regional Administrative Court of Lombardia, that was partially accepted with a decision of December 2004. The Authority filed a claim against this decision with the Council of State and informed Eni on 19 February 2005. The hearing for the discussion of this case has not yet been scheduled. Inquiry of the Authority for electricity and gas on the use of storage capacity conferred in 2004/2005 and 2005/2006 With decision No. 37 of 23 February 2006, the Authority for electricity and gas started an inquiry on a few natural gas selling companies, among which Eni, with reference to the use of storage capacity in years 2004/2005 and 2005/2006. For the 2004/2005 thermal year and for the period from 1 October 2005 to 31 December 2005 the Authority considers the use of modulation storage capacity as characterized by higher offtake than actually necessary given the weather of the period than the volumes considered necessary to satisfy the requirements for which the company conferred priority. Legislative Decree No. 164/2000 Legislative Decree No. 164/2000 imposed thresholds to operators until 31 December 2010 in relation to a percentage share of domestic consumption set as follows: (i) 75%, from 1 January 2002, for imported or domestically produced natural gas volumes input in the domestic transmission network destined to sales; this percentage decreases by 2 percentage points per year until it reaches 61% in 2009; (ii) 50% from 1 January 2003 for sales to final customers. These ceilings are calculated net of volumes consumed in operations and in the case of sales also net of losses. The decree also provides for a periodical control of the respect of said ceilings. This control is performed each year by the Antitrust Authority by comparing the allowed three-year average percentage share of domestic consumption for both input volumes and sales volumes with the one actually achieved by each operator. In particular 2005 closes the second three-year regulated period for natural gas volumes input in the domestic transmission network, for which the allowed percentage is 71% of domestic consumption of natural gas and the first three-year regulated period for sales volumes. Enis presence on the Italian market complied with said limit. Transport of natural gas Decision No. 166/2005 of the Authority for electricity and gas With Decision No. 166 of 29 July 2005, the Authority for electricity and gas approved criteria for the definition of tariffs for the transport of natural gas on the national and regional network of gas pipelines for the second four-thermal-year regulated period (1 October 2005-30 September 2009). The new tariff structure confirms the breakdown of the tariff into two components: capacity and commodity in a ratio of 70 to 30 and the entry-exit model for the determination of the capacity component on the national pipeline network, already present in the previous tariff regime established by Decision No. 120/2001.

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The major new elements of the new regime are as follows: a reduction of the rate of return of capital employed in transport activities from 7.94% to 6.7% (pre-tax); a new set of incentives for new capital expenditure. In the previous regime, the return on upgrade and capacity expansion expenditure was 7.47% for one year only included in the calculation of the capacity component of the transport tariff and 4.98% for 6 years in the calculation of the commodity component. The new tariff structure provides an additional rate of return depending on the type of expenditure on the return rate acknowledged to capital employed: from a minimum of 1% for safety measures that do not increase transport capacity, applied for 5 years, to a maximum of 3% for expenditure that increases capacity at entry points into the national network, applied for 15 years. The additional return is part of the determination of the maximum allowed revenues in the calculation of the capacity component of the tariff and therefore is not influenced by changes in volumes transported; the updating by means of a price cap mechanism of the allowed revenues the transport undertaking is entitled to and the annual recalculation of the portion relating to capital costs. This price cap mechanism applies to operating costs and amortization charges (previously it applied to the allowed revenues). The annual rate of recovery of productivity was confirmed at 2%; this is used to reduce the effect of changes in the consumer price index on the updating of the preceding years allowed revenues; the reduction from 4.5% to 3.5% of the preset annual rate of change of productivity recovery for the updating of the commodity component of the tariff; the elimination from the tariff of the fixed connection fee, substituted by an amount proportional to measurement, aimed at favoring measuring and data collection; confirmation of the tariff reduction for start-ups (construction/upgrade of combined cycle plants for electricity generation) and for offtake in low season periods (from 1 May to 31 October) already contained in Decisions No. 5/2005 and 6/2005 which updated the previous tariff regime. The companies active in the field of gas transport submit their tariff proposals to the Authority before 31 March of each year. Budget Law for 2006 Law No. 266/2005 (budget law for 2006) extended from 1 July 2007 to 31 December 2008 the deadline (determined by Legislative Decree No. 293/2003 amended and converted into Law No. 290/2003) beyond which companies operating in production, import, distribution and sale of natural gas and electricity are no longer allowed to own more than 20% of the share capital of companies managing national networks for the transmission of natural gas and electricity. At 31 December 2005 Eni holds a 50.05% interest in Snam Rete Gas.

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New tax criteria for the determination of amortizations for companies operating in transport and distribution of natural gas The criteria for the determination of the annual share of amortizations of natural gas transport and distribution assets deductible in the determination of income taxes have been changed starting in 2005 onwards by Law Decree No. 203 of 30 September 2005, converted into Law No. 248 of 2 December 2005 and Law No. 266 of 23 December 2005 (budget law for 2006). Due to these changes, the share of amortizations that was previously calculated based on rates set by a decree of the Minister of Finance of 31 December 1988, is now determined by dividing the relevant asset gross book value in accordance with the useful lives determined by the Authority for electricity and gas and reducing the amount obtained after tax by 20%. The alignment of the fiscal lives of natural gas transport and distribution assets to their useful lives entails the anticipation of the payment of income taxes given the postponement of the deductibility of amortization without impacting on net income of companies involved (mainly Snam Rete Gas and Italgas), except for the financial charges related to this cash anticipation. Distribution activities Change of Decision No. 237/2000 and new tariff criteria Decision No. 104 of 25 June 2004 postponed to 30 September 2004 the duration term of the first regulated period for natural gas distribution activity and the validity of the basic tariff options approved by the Authority for thermal year 2004. With Decision No. 170 of 29 September 2004 the Authority defined gas distribution tariffs for the second regulated period from 1 October 2004 to 30 September 2008, setting at 7.5% the rate of return on capital employed of distribution companies, as compared to the 8.8% rate set for the previous distribution tariff regime. The rate of productivity recovery one of the components of the annual updating mechanism was set at 5% of operating expenses and amortization charges (as compared to the 3% rate applied to total expenses and charges in the preceding regulated period). Municipalities may request a contribution lower than 1% of revenues of distribution companies destined to cover supply costs of certain categories of customers. The Regional Administrative Court of Lombardia in a decision published on 16 February 2005 accepted the distributors claim against it and cancelled Decision No. 170/2004 of the Authority in the part where it defined criteria that: (i) do not foresee that allowed revenues for distribution companies for the second regulated period are calculated keeping into account expenditure made and to be made after those considered for the approval of allowed revenues for thermal year 2003-2004; (ii) foresee a constant rate of productivity recovery for the whole regulated period in the updating of allowed revenues. The Authority filed a claim with the Council of State, that, on 8 March 2005 suspended the Regional Administrative Courts decision while waiting for the judgment. Accepting the Administrative Courts decision: (i) with Decision No. 122 of 21 June 2005, the Authority integrated and changed Decision No. 170/2004 defining a new determination mechanism for distribution tariffs that take into account the expenditure made by distributing companies; (ii) with Decision No. 171 of 3 August 2005 the Authority also defined the application modes of the individual regime contained in Decisions No. 170 and 173/2004. Regasification activities Decision No. 197/2005 of the Authority for electricity and gas (regasification tariffs) With its Decision No. 197/2005 the Authority for electricity and gas rejected the tariff proposal for the thermal year 1 October 2005-30 September 2006 of GNL Italia for regasification services provided at its Panigaglia terminal. The Authority determined other tariffs stating that GNL Italias tariffs were inconsistent with the criteria set by Decision No. 178/2005, against which GNL Italia had filed a claim in December 2005 with the Regional Administrative Court of Lombardia. The continuos or spot regasification tariff contains a specific component related to the contractually involved regasification capacity, a specific component related to volumes regasified and two components related to the energy associated to the volumes regasified. The first component has a 30% discount when the service is provided spot as compared to continuous service.

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POWER GENERATION Enis electricity business is managed by EniPower and its subsidiaries that own power stations located at Enis sites in Ferrera Erbognone, Ravenna, Livorno, Taranto, Mantova, Brindisi and Ferrara with installed capacity of 4.5 gigawatts at 31 December 2005 (up 1.3 gigawatt from 2004). Eni is completing a plan for expanding its power generation capacity, targeted at an installed capacity of 5.5 gigawatt in 2009 with production amounting to 30 terawatthour from 2008, corresponding to over 10% of electricity generated in Italy at that date. Planned capital expenditure amounts to approximately euro 2.4 billion, of these works for euro 1.8 billion have already been completed. New installed generation capacity employs the CCGT technology (combined cycle gas fired), which allows to obtain high efficiency and low environmental impact. In particular, Eni estimates that given the same amount of energy (electricity and heat) produced, the use of the CCGT technology on a production of 30 terawatthour will allow to reduce emissions of carbon dioxide by approximately 11 million tonnes, as compared to emissions caused by conventional power stations. The development plan has been completed at all sites except for Ferrara (Enis interest 51%), where in partnership with Swiss company EGL AG construction is underway of two new 390 megawatt combined cycle units which will bring installed capacity to 840 megawatt with startup expected in 2007. In 2005, electricity production sold was 22.8 terawatthour, up 8.9 terawatthour, or 64.4% from 2004, due the entry into service of the new power units at Mantova (up 3.9 terawatthour) and Brindisi (up 1.9 terawatthour) and to the full commercial operation of the Ravenna (up 1.6 terawatthour) and Ferrera Erbognone (up 1.1 terawatthour) plants. Eni also purchased 4.8 terawatthour from third parties in Italy and outside Italy. Sales of steam amounted to 10.7 million tonnes, increasing by 620,000 tonnes, up 6.2% from 2004. Approximately 57% of sales were directed to end users, 28% to the Electricity Exchange, 8% to GRTN/Terna (under CIP 6/92 contracts and imbalances in input) and 7% to wholesalers. All the steam produced was sold to end users. Capital expenditure In 2005, capital expenditure in the Gas & Power segment totaled euro 1,152 million (euro 1,451 million in 2004) and related in particular to: (i) development and maintenance of Enis transmission network in Italy (euro 643 million); (ii) the continuation of the construction of combined cycle power plants (euro 239 million); (iii) development and maintenance of Enis distribution network in Italy (euro 182 million) (iv) development of Enis transport network outside Italy (euro 48 million). As compared to 2004, capital expenditure declined by euro 299 million, down 20.6%, due essentially to the completion of the Greenstream gasline and of the power generation development plan.

2003 2004 2005 Change % Ch.

| Purchases — Natural
gas | (million cubic meters) | 940 | 2,617 | 4,384 | 1,767 | | 67.5 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Other fuels | (thousand toe) | 847 | 695 | 563 | (132 | ) | (19.0 | ) |
| Sales | | | | | | | | |
| Electricity production sold | (terawatthour) | 5.55 | 13.85 | 22.77 | 8.92 | | 64.4 | |
| Electricity
trading | (terawatthour) | 3.10 | 3.10 | 4.79 | 1.69 | | 54.5 | |
| Steam | (thousand tonnes) | 9,303 | 10,040 | 10,660 | 620 | | 6.2 | |

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Refining & Marketing

(million euro) 2004 2005

Revenues (1)		26,089	33,732
Operating
profit		1,080	1,857
Replacement cost operating profit		687	793
Adjusted
operating profit		923	1,214
Capital expenditure		693	656
Employees
at period end	(units)	9,224	8,894

(1) Before elimination of intersegment sales.

Despite a market characterized by declining domestic consumption of fuels, the market share of Agip branded service stations increased by 0.2 percentage points to 29.7% due to an improved performance also related to the success of the Do-It-Yourself campaign that as of 31 December boasted 3.8 million clients

Eni divested its total interest in Italiana Petroli SpA, a company distributing fuels in Italy through a lease concession network under the IP brand

Despite a decline in consumption, sales of fuels in the rest of Europe (3.67 million tonnes) increased by 6% due to the development strategy pursued by Eni in selected markets with interesting growth prospects where Eni leveraged on its well known brand and the proximity of its own production and logistic structures

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Refinery throughputs on own account (38.79 million tonnes) increased by 2.9% despite the standstill of the Gela refinery in the first months of the year due to the damage caused to the docking infrastructure by a severe sea storm

Supply and trading In 2005, a total of 66.48 million tonnes of oil were purchased (67.05 in 2004), of which 37.30 million tonnes from Enis Exploration & Production segment 1 , 14.85 million tonnes under long-term contracts with producing countries, and 14.33 million tonnes on the spot market. Some 24% of oil purchased came from West Africa, 19% from North Africa, 17% from countries of the former Soviet Union, 16% from the Middle East, 14% from the North Sea, 7% from Italy and 3% from other areas. Some 31.07 million tonnes were resold, representing a decrease of 1.32 million tonnes from 2004, down 4.1%. In addition, 3.58 million tonnes of intermediate products were purchased (3.10 in 2004) to be used as feedstocks in conversion plants and 16.21 million tonnes of refined products (18.8 in 2004) sold as a complement to own production on the Italian market (4.97 million tonnes) and on markets outside Italy (11.24 million tonnes).

(1) The Refining & Marketing segment purchased approximately two thirds of the Exploration & Production segments oil and condensate production and resold on the market those crudes and condensates that are not suited to processing in its own refineries due to their characteristics or geographic area.

Supply of oil (million tonnes) 2003 2004 2005 Change % Ch.

| Eni
production outside Italy | 29.38 | 31.70 | 32.86 | 1.16 | | 3.7 | |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Eni production in Italy | 4.18 | 4.03 | 4.44 | 0.41 | | 10.2 | |
| Total
Eni production | 33.56 | 35.73 | 37.30 | 1.57 | | 4.4 | |
| Spot markets | 12.20 | 11.42 | 14.33 | 2.91 | | 25.5 | |
| Long-term
contracts | 17.60 | 19.90 | 14.85 | (5.05 | ) | (25.4 | ) |
| | 63.36 | 67.05 | 66.48 | (0.57 | ) | (0.9 | ) |

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Refining In 2005 refining throughputs on own account in Italy and outside Italy were 38.79 million tonnes, up 1.10 million tonnes from 2004, or 2.9%, due to higher processing at Enis wholly-owned refineries of Taranto, Livorno and Sannazzaro also as a result of fewer maintenance standstills. These increases were offset in part by the impact of the maintenance standstill of the Porto Marghera refinery and lower processing at the Gela refinery following the damage caused by a sea storm to the docking infrastructure in December 2004. Processing on third party refineries increased, especially at the Milazzo refinery (Enis interest 50%). Total throughputs on wholly owned refineries (27.34 million tonnes) increased 0.59 million tonnes from 2004, or 2.2%, with full balanced capacity utilization. About 32.3% of all oil processed came from Enis Exploration & Production segment (33% in 2004). Distribution of refined products In 2005 sales volumes of refined products (51.63 million tonnes) were down 1.91 million tonnes from 2004, or 3.6%, mainly due to the divestment of activities in Brazil in August 2004 (down 1.51 million tonnes), lower sales volumes to oil companies and traders outside Italy (down 305,000 tonnes), declining wholesale sales volumes in Italy (220,000 tonnes) and lower sales on the Agip branded network (130,000 tonnes) related to lower domestic consumption. These declines were offset in part by higher retail and wholesale sales in the rest of Europe (357,000 tonnes) due to Enis development strategy. The impact of the divestment of 100% of IP effective from 1 September 2005, on retail sales volumes (down 750,000 tonnes) was partly offset by higher sales volumes to the divested company (up 650,000 tonnes) as Eni continues to supply fuels under a five-year contract signed concurrently with the divestment.

Petroleum products availability (million tonnes) 2003 2004 2005 Change % Ch.

Italy — Refinery intake in wholly-owned refineries	25.09		26.75		27.34		0.59		2.2
Refinery
intake for third parties	(1.72	)	(1.50	)	(1.70	)	(0.20	)	13.3
Refinery intake in non owned refineries	8.43		8.10		8.58		0.48		5.9
Consumption
and losses	(1.64	)	(1.64	)	(1.87	)	(0.23	)	14.0
Products available	30.16		31.71		32.35		0.64		2.0
Purchases
of finished products and change in inventories	5.86		5.07		4.85		(0.22	)	(4.3	)
Finished products transferred to foreign cycle	(5.19	)	(5.03	)	(5.82	)	(0.79	)	15.7
Consumption
for power generation	(1.07	)	(1.06	)	(1.09	)	(0.03	)	2.8
Products sold	29.76		30.69		30.29		(0.40	)	(1.3	)
Outside
Italy
Products available	3.36		4.04		4.33		0.29		7.2
Purchases
of finished products and change in inventories	12.12		13.78		11.19		(2.59	)	(18.8	)
Finished products transferred from Italian cycle	5.19		5.03		5.82		0.79		15.7
Products
sold	20.67		22.85		21.34		(1.51	)	(6.6	)
Sales in Italy and outside Italy	50.43		53.54		51.63		(1.91	)	(3.6	)

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Retail sales in Italy Sales volumes of refined products on retail markets in Italy (10.05 million tonnes) were down 0.88 million tonnes from 2004, or 8.1%, reflecting primarily the divestment of IP. Sales volumes on the Agip branded network (8.76 million tonnes) were down 130,000 tonnes, or 1.5%, due mainly to a decline in domestic consumption (down 1.9%) in particular of gasoline and LPG, whose effects were offset in part by an improved performance. Market share of the Agip network was up 0.2 percentage points from 29.5 to 29.7%. Average throughput of gasoline and diesel fuel of the Agip network was substantially unchanged at 2,509,000 liters (down 0.7%). At 31 December 2005, Enis retail distribution network in Italy consisted of 4,349 Agip branded service stations, 2,895 less than at 31 December 2004 (7,244 service stations), due to the divestment of IP (2,915 service stations). Excluding the effect of IPs sale, the Agip branded network increased by 20 units from 31 December 2004 as a result of the positive balance of acquisitions/releases of lease concessions (27 units), the opening of 12 new service stations and an increase in highway service stations (2 service stations) offset in part by the closure of 21 less efficient service stations. Sales volumes of BluDiesel a high performance and low environmental impact diesel fuel on the Agip branded network amounted to 1 billion liters, a decline of about 13% from 2004 due mainly to the increasingly high sensitivity of consumers to the price of fuels in light of their remarkable increase in the year. At 2005 year-end service stations selling BluDiesel were over 4,000 (about 3,900 at 2004 year-end) corresponding to approximately 92% of Enis Agip branded network. Sales volumes of BluSuper a high performance and low environmental impact gasoline sold on the Agip branded network since June 2004 amounted to 150 million liters. At 2005 year-end service stations selling BluSuper were 1,719 (about 1,000 at 2004 year-end) corresponding to approximately 39% of Enis network. In 2005 Eni continued its Do-It-Yourself campaign which allows customers accessing self-service outlets with an electronic card to obtain price discounts or gifts (under agreements with Vodafone and Coop) in proportion to the total amount of purchased fuel. Further bonuses are offered to the most faithful customers. At year-end the number of cards distributed was about 3.8 million; turnover on cards increased by 9% from 2004. The amount of fuel purchased with the card was about 37% of all fuel sold on Agip branded service stations joining the

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campaign, corresponding to about 30% of the whole Agip branded network. Divestment of Italiana Petroli Following the approval of the Italian Antitrust Authority granted on 25 August 2005, on 6 September 2005 Eni divested 100% of the share capital of IP to api - anonima petroli italiana SpA for euro 190 million, subject to an adjustment for the change in IPs net equity between 31 December 2004 and 31 August 2005. As part of the sale transaction, the parties signed: (i) a five-year fuel supply agreement under which IP will purchase from Eni given amounts of fuel each year; (ii) an 18-month long agreement for the supply of lubricants and fuel transport services from storage sites to service stations. Retail sales outside Italy Sales volumes of refined products on retail markets in the rest of Europe were 3.67 million tonnes, up 0.20 million tonnes from 2004, or 5.8%, in particular in Germany, Spain and the Czech Republic, due to the purchase/construction of service stations and to an improved performance, whose effects were offset in part by a decline in the demand for fuels. At 31 December 2005, Enis retail distribution network in the rest of Europe consisted of 1,933 service stations, 37 more than at 31 December 2004, due in particular to

Sales of refined products in Italy and outside Italy (million tonnes) 2003 2004 2005 Change % Ch.

Retail marketing	10.99	10.93	10.05	(0.88	)	(8.1	)
- Agip	8.99	8.88	8.75	(0.13	)	(1.5	)
- IP	2.00	2.05	1.30	(0.75	)	(6.6	)
Wholesale
marketing	10.35	10.70	10.48	(0.22	)	(2.1	)
	21.34	21.63	20.53	(1.1	)	(5.1	)
Petrochemicals	2.79	3.05	3.07	0.02		0.7
Other sales (1)	5.63	6.01	6.69	0.68		11.3
Sales
in Italy	29.76	30.69	30.29	(0.4	)	(1.3	)
Retail marketing rest of Europe	3.02	3.47	3.67	0.2		5.8
Retail
marketing Africa and Brazil	1.18	0.57		(0.57	)	(100.0	)
Wholesale marketing	6.01	5.30	4.50	(0.80	)	(15.1	)
	10.21	9.34	8.17	(1.17	)	(12.5	)
Other sales (1)	10.46	13.51	13.17	(0.34	)	(2.5	)
Sales
outside Italy	20.67	22.85	21.34	(1.51	)	(6.6	)
	50.43	53.54	51.63	(1.91	)	(3.6	)

(1) Includes bunkering, sales to oil companies and traders and MTBE sales.

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the acquisition of lease concessions in Spain, France and Germany. Average throughput (2,427,000 liters) was up 1.4%. Wholesale sales Sales volumes on wholesale markets in Italy were 10.48 million tonnes, down 0.22 million tonnes from 2004, or 2.1%, reflecting mainly a decline in domestic consumption and lower sales of fuel oil to the power generation segment, due to the progressive substitution of fuel oil with natural gas as feedstock for power plants. Sales on wholesale markets outside Italy (4.50 million tonnes) declined by 0.80 million tonnes, or 15.1%, due mainly to lower LPG sales resulting from the divestment of activities in Brazil, offset in part by higher sales in the rest of Europe, in particular in Central-Eastern Europe, while they declined in Germany and Spain. Other sales (22.93 million tonnes) increased by 0.36 million tonnes, or 1.6%, due mainly to higher sales in Italy related to supplies to IP (up 650,000 tonnes) offset in part by lower sales to oil companies and traders outside Italy (down 305,000 tonnes). Capital expenditure In 2005, capital expenditure in the Refining & Marketing segment amounted to euro 656 million (euro 693 million in 2004) and concerned: (i) refining and logistics (euro 349 million), in particular plant efficiency and flexibility improvement actions among which the completion of the tar gasification plant at the Sannazzaro refinery; (ii) the upgrade of the distribution network and the construction of new service stations in Italy (euro 154 million); (iii) the upgrade of the distribution network and to a lower extent the purchase of service stations in the rest of Europe (euro 71 million). As compared to 2004, capital expenditure declined by euro 37 million, or 5.3%, due essentially to the completion of the mentioned plant in Sannazzaro.

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Petrochemicals

(million euro) 2004 2005

Revenues (1)		5,331	6,255
Operating
profit		320	202
Replacement cost operating profit		277	183
Adjusted
operating profit		263	261
Capital expenditure		148	112
Employees
at period end	(units)	6,565	6,462

(1) Before elimination of intersegment sales.

Sales - production - prices In 2005 sales of petrochemical products (5,376,000 tonnes) were up 189,000 tonnes, or 3.6% from 2004, reflecting primarily higher sales of intermediates (up 13%), olefins (up 8.8%) and aromatics (up 6%) related to positive demand, higher product availability and the fact that intermediate sales, in particular acetone and phenol, declined in the first quarter of 2004 following a standstill due to an accident occurred at the Porto Torres dock. These increases were offset in part by a decline in: (i) elastomers (down 4.5%) related mainly to the standstill of the polychloroprene rubber plant in Champagnier, France; (ii) styrene (down 2.6%) related to standstills and shutdowns; (iii) polyethylenes (down 2.3%) due to weak demand for LDPE and LLDPE. At 31 December 2005, Enis sales network covered 17 countries, with Italy accounting for 51% of sales, the rest of Europe for 44% and the rest of the world for 5% (54%, 40% and 6%, respectively in 2004). Production (7,282,000 tonnes) was up 164,000 tonnes from 2004, or 2.3%, in particular in basic petrochemicals. Nominal production capacity declined 1.8% from 2004 due mainly to revisions of the nominal capacity of the Gela cracker and the shutdown of the DMC and ABS plants in Ravenna. The average plant utilization rate calculated on nominal capacity was up 3

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percentage points from 75.2 to 78.4 due mainly to fewer maintenance standstills. About 35.8% of total production was directed to Enis own production cycle (36.7% in 2004). Oil-based feedstocks supplied by Enis Refining & Marketing segment covered 23% of requirements (22% in 2004). The prices of Enis main petrochemical products increased on average by 12% in all business areas. The most relevant increases were in: (i) olefins (up 24.3%) in particular butadiene (up 40.1%) and propylene (up 27.1%), ethylene (up 16.4%) was affected by a decline in the third quarter; (ii) elastomers (up 18%) in particular styrene-butadiene rubbers (up 24.8%), polybutadiene rubbers (up 23.5%) and EPR rubbers (up 18%) due to the transfer on prices of the increased cost of raw materials; (iii) polyethylene (up 13.9%) with increases in all products, in particular EVA (up 17.4%); (iv) intermediates (up 5.7%) in particular acetone (up 10.4%) recovering higher propylene costs; (v) aromatics (up 5.6%) due to increases in xylenes (up 12.8%) and declines in benzene (down 4.1%); (vi) styrenes (up 4%) due to increases in ABS/SAN (up 9.2%) and compact polystyrene (up 6.4%), while expandable polystyrene declined (down 3.3%). Business areas Basic petrochemicals Sales of basic petrochemicals (3,022,000 tonnes) increased by 256,000 tonnes from 2004, up 9.3%, due to increases registered in all businesses. In olefins (up 8.8%) sales of ethylene (up 10.7%), propylene (up 5.8%) and butadiene (up 33.6%) increased due to high demand from the Far East. In aromatics (up 6%) sales of the most remunerative products (paraxylene up 13.5% and metaxylene up 35.1%) increased supported by a particularly lively market. In intermediates (up 13%) phenol sales increased 16.7% and acetone sales increased 11.1% related to a positive trend in demand and the fact that in the first quarter of 2004 sales declined due to a standstill for an accident occurred at the Porto Torres dock. Basic petrochemical production (4,450,000 tonnes) increased by 214,000 tonnes from 2004 (up 5.1%) due to increases registered in all businesses (olefins up 3.8%, aromatics up 8.4%, intermediates up 7%). Increased olefin production derived mainly from the Brindisi (up 19.9%), Dunkirk (up 12%) and Priolo (up 8.1%) crackers. Declines concerned Gela (down 26.7%) where only one line was active and Porto Marghera (down 13.2%) due to a planned maintenance standstill. Styrene and elastomers Styrene sales (581,000 tonnes) decreased by 16,000 tonnes from 2004, down 2.6%, due mainly to lower ABS/SAN availability (down 23.6%) related to the shutdown of the Ravenna plant in April 2005 and lower availability of products due to technical accidents caused by power cutoffs at the Mantova plant in the last quarter of 2005. This decline was offset in part by the 2.8% increase in expandable polystyrene sales pushed by the strong increase in demand especially in Eastern Europe, in particular for increased consumption in the segment of thermal insulation and industrial packaging. Elastomer sales (422,000 tonnes) decreased by 19,000 tonnes from 2004, down 4.5%, due mainly to the

Product availability (thousand tonnes) 2003 2004 2005 Change % Ch.

| Basic petrochemicals — Styrene
and elastomers | 4,014 — 1,634 | | 4,236 — 1,606 | | 4,450 — 1,523 | | 214 — (83 | 5.1 — (5.2 | ) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Polyethylene | 1,259 | | 1,276 | | 1,309 | | 33 | 2.6 | |
| Production | 6,907 | | 7,118 | | 7,282 | | 164 | 2.3 | |
| Consumption of monomers | (2,651 | ) | (2,616 | ) | (2,606 | ) | 10 | (0.4 | ) |
| Purchases
and change in inventories | 1,010 | | 685 | | 700 | | 15 | 2.2 | |
| | 5,266 | | 5,187 | | 5,376 | | 189 | 3.6 | |

Sales (thousand tonnes) 2003 2004 2005 Change % Ch.

| Basic
petrochemicals | 2,704 | 2,766 | 3,022 | 256 | | 9.3 | |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Styrene and elastomers | 1,171 | 1,038 | 1,003 | (35 | ) | (3.4 | ) |
| Polyethylene | 1,391 | 1,383 | 1,351 | (32 | ) | (2.3 | ) |
| | 5,266 | 5,187 | 5,376 | 189 | | 3.6 | |

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standstill of the Champagnier plant (polychloroprene rubbers) and the decline in SBR (down 12.7%) and TPR (down 2.5%) rubber due to a decline in demand related to the crisis in the shoe manufacturing industry. These declines were offset in part by an increase in sales of EPR rubber (up 19.6%) and latex (up 7.5%), due to lively demand. Production of styrene (1,048,000 tonnes) declined by 70,000 tonnes from 2004, due mainly to plant shutdowns and standstills. Elastomers production (475,000 tonnes) decreased by 13,000 tonnes or 2.5%, due to plant standstills and a declining demand for SBR rubber (down 4.8%) and BR (down 4.2%), while demand for EPR rubber (up 13.7%) and latex (up 11%) increased in line with the increase in demand. Polyethylene Sales of polyethylene (1,351,000 tonnes) decreased by 32,000 tonnes from 2004, down 2.3%, due to a decline in demand for all products, in particular LDPE (down 3.4%) and LLDPE (down 1.9%), also due increasing competition from imported products. Production (1,309,000 tonnes) increased by 33,000 tonnes or 2.6%, due mainly to increases in LLDPE (up 8%), due to the flexibility at the Brindisi plant that produced mainly LLDPE in its high pressure line, while HDPE production declined (down 6%). Capital expenditure In 2005, capital expenditure amounted to euro 112 million (euro 148 million in 2004) and concerned in particular actions for upkeeping (euro 37 million), extraordinary and periodical maintenance (euro 27 million), actions for environmental protection and for complying with safety and environmental regulations (euro 25 million) and for improving the efficiency of plants and streamlining (euro 23 million).

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Oilfield Services Construction and Engineering

(million euro) 2004 2005

Revenues (1)		5,696	5,733
Operating
profit		203	307
Capital expenditure		186	349
Employees
at period end	(units)	25,819	28,684

(1) Before elimination of intersegment sales.

Purchase of Snamprogetti by Saipem On 24 February 2006, Saipem agreed to purchase the entire share capital of Snamprogetti owned by Eni SpA. The transaction was closed on 27 March 2006. The deal will create a new leader with worldwide clout in oilfield services both onshore and offshore with 30,000 personnel, of which 6,500 engineers. The integration of the companies will boost their role in the development of Enis oil & gas core business. Activity for the year Orders acquired and order backlog Orders acquired in 2005 amounted to euro 8,188 million. About 89.5% of new orders acquired was represented by work to be carried out outside Italy, and 10.8% by work originated by Eni companies. Enis order backlog was euro 9,964 million at 31 December 2005 (euro 8,521 million at 31 December 2004). Projects to be carried out outside Italy represented 87.9% of the total order backlog, while orders from Eni companies amounted to 7% of the total. The engineering order backlog increased by euro 1,236 million due in particular to the recovery ongoing in reference markets.

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Orders acquired and order backlog (million euro) 2003 2004 2005

| Orders
acquired | | 5,876 | 5,784 | 8,188 |
| --- | --- | --- | --- | --- |
| Oilfield Services Construction | | 4,298 | 4,387 | 4,735 |
| Engineering | | 1,578 | 1,397 | 3,453 |
| Originated by Eni companies | (%) | 11 | 14 | 11 |
| To be
carried out outside Italy | (%) | 91 | 90 | 89 |
| Order backlog | | 9,405 | 8,521 | 9,964 |
| Oilfield
Services Construction | | 5,225 | 5,306 | 5,513 |
| Engineering | | 4,180 | 3,215 | 4,451 |
| Originated
by Eni companies | (%) | 10 | 8 | 7 |
| To be carried out outside Italy | (%) | 81 | 84 | 88 |

CEPAV Uno and CEPAV Due Eni holds interests in the CEPAV Uno (50.36%) and CEPAV Due (52%) consortia that in 1991 signed two contracts with TAV SpA to participate in the construction of the tracks for high speed/high capacity trains from Milan to Bologna (under construction) and from Milan to Verona (in the design phase). As part of the project for the construction of the tracks from Milan to Bologna, an addendum to the contract between CEPAV Uno and TAV SpA was signed on 27 June 2003, redefining certain terms and conditions. Works completed at the end of 2005 corresponded to 71% of the total contractual price in line with the contractual obligations. As concerns the Milan-Verona portion, in December 2004 CEPAV Due presented the final project, prepared in accordance with Law No. 443/2001 on the basis of the preliminary project approved by the CIPE. The final project will be examined by TAV, presented to the Conferenza dei Servizi and to CIPE for approval. Infrastrutture SpA, a company established by the Italian Government in order to collect resources for financing the works contemplated by the mentioned law, is collecting the resources for the whole work and for the preliminary activities for the signature of the contract. As concerns the arbitration procedure requested by the consortium against TAV for the recognition of damage related to TAVs belated completion of its tasks, in September 2004 a technical survey was requested by the arbitration committee. The date for the final decision was set at 30 October 2006.

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Capital expenditure In 2005, capital expenditure in the Oilfield Services, Construction and Engineering segment amounted to euro 349 million, up 87.6% from 2004 and concerned mainly oilfield services and construction (euro 346 million), in particular: (i) maintenance and upgrade of equipment; (ii) vessels and logistical support means for specific contracts, in particular Kashagan; (iii) upgrade of operating structures in Kazakhstan and West Africa; (iv) the purchase of the Margaux tanker ship and the beginning of its conversion into an FPSO unit that will operate in Brazil on the Golfinho field.

Contents

Financial Review

Profit and loss account

(million euro) 2004 2005 Change % Ch.

| Net sales from operations — Other
income and revenues | 57,545 — 1,377 | | 73,728 — 798 | | 16,183 — (579 | ) | 28.1 — (42.0 | ) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Operating expenses | (41,592 | ) | (51,918 | ) | (10,326 | ) | (24.8 | ) |
| Depreciation,
amortization and writedowns | (4,931 | ) | (5,781 | ) | (850 | ) | (17.2 | ) |
| Operating profit | 12,399 | | 16,827 | | 4,428 | | 35.7 | |
| Net
financial expense | (156 | ) | (366 | ) | (210 | ) | (134.6 | ) |
| Net income from investments | 820 | | 914 | | 94 | | 11.5 | |
| Profit
before income taxes | 13,063 | | 17,375 | | 4,312 | | 33.0 | |
| Income taxes | (5,522 | ) | (8,128 | ) | (2,606 | ) | (47.2 | ) |
| Profit
before minority interest | 7,541 | | 9,247 | | 1,706 | | 22.6 | |
| Minority interest | (482 | ) | (459 | ) | 23 | | 4.8 | |
| Net
profit | 7,059 | | 8,788 | | 1,729 | | 24.5 | |
| Net
profit | 7,059 | | 8,788 | | 1,729 | | 24.5 | |
| Exclusion of inventory holding (gain) loss | (281 | ) | (759 | ) | (478 | ) | .. | |
| Net
profit at replacement cost (1) | 6,778 | | 8,029 | | 1,251 | | 18.5 | |
| Exclusion of special items | (133 | ) | 1,222 | | 1,355 | | .. | |
| Adjusted
net profit (1) | 6,645 | | 9,251 | | 2,606 | | 39.2 | |

(1) Adjusted operating profit and net profit are before inventory holding gains or losses and special items. For an explanation of these measures and a reconciliation of adjusted operating profit and net profit to reported operating profit and net profit see page 61.

In 2005 Eni reported a net profit of euro 8,788 million, a euro 1,729 million increase from 2004, or 24.5%, driven by a euro 4,428 million increase in operating profit (up 35.7%) of which euro 762 million are a higher inventory holding gain recorded in particular in the Exploration & Production segment, relative to an increase in realizations in dollars (Brent up 42.3%) and higher sales volumes of oil and natural gas (up 38.3 million boe, or 6.7%). These positives were offset in part by higher environmental provisions (euro 532 million), a provision to the risk reserve concerning the fine imposed on 15 February 2006 by the Antitrust Authority 1 and the estimated impact of the application of Decision No. 248/2004 of the Authority for Electricity and Gas 2 affecting natural gas prices to residential customers and wholesalers (euro 225 million) in force from 1 January 2005 and the recording in 2004 of net gains on the sale of assets by the Exploration & Production segment (euro 320 million). The increase in operating profit was offset in part by higher income taxes (up euro 2,606 million). Return on capital employed (ROACE) 3 was 19.5%, compared with 16.6% in 2004.

| (1) | For
information on the Antitrust fine see Operating
review - Gas & Power - Regulatory framework -
TTPC. |
| --- | --- |
| (2) | For information on
Decision No. 248/2004 see Operating review - Gas
& Power - Regulatory framework - Actions by the
Antitrust Authority and the Authority for electricity and
gas. |
| (3) | For the definition of
ROACE see Glossary below. |

Contents

Adjusted net profit, that excludes an inventory holding gain of euro 759 million after taxes, and a euro 1,222 million special charge after taxes, increased by euro 2,606 million or 39.2% to euro 9,251 million. Operating profit for the year was euro 16,827 million, up euro 4,428 million from 2004, or 35.7%, reflecting primarily the increases reported in the following segments: Exploration & Production (up euro 4,389 million, or 53.6%) primarily reflecting higher realizations in dollars (oil up 41.3%, natural gas up 15.6%) combined with increased production volumes sold (up 38.3 million boe, or 6.7%), offset in part by higher operating costs and amortization charges and the fact that net gains on the divestment of assets for euro 320 million were recorded in 2004; Refining & Marketing (up euro 777 million, or 71.9%) primarily reflecting a higher inventory holding gain (up euro 671 million), stronger realized refining margins (margins on Brent were up 1.4 dollar/barrel, or 33%) and higher operating profit in distribution activities in Italy, offset in part by higher environmental provisions (euro 195 million). These increases were partly offset by: lower operating profit in the Gas & Power segment (down euro 107 million, or 3.1%) due primarily to a euro 290 million charge pertaining to a fine imposed by the Italian regulator and the euro 225 million estimated adverse impact of Decision No. 248/2004 of the Italian Authority for Electricity and Gas affecting natural gas prices to residential customers and wholesalers. A decrease in natural gas and electricity sales margins also adversely impacted the Gas & Power operating profit. On the positive side, sales volumes of natural gas were up 6.13 billion cubic meters or 8%, sold production of electricity was up 8.92 terawatthour, or 64.4% and a higher inventory holding gain was recorded (up euro 115 million); higher operating losses recorded by the Other activities segment (down euro 507 million, or 128.4%) due primarily to higher environmental and other provisions (euro 439 million).

Net sales from operations (million euro) 2004 2005 Change % Ch.

| Exploration & Production — Gas &
Power | 15,346 — 17,302 | | 22,477 — 22,969 | | 7,131 — 5,667 | | 46.5 — 32.8 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Refining & Marketing | 26,089 | | 33,732 | | 7,643 | | 29.3 | |
| Petrochemicals | 5,331 | | 6,255 | | 924 | | 17.3 | |
| Oilfield Services Construction and Engineering | 5,696 | | 5,733 | | 37 | | 0.6 | |
| Other
activities | 1,279 | | 1,358 | | 79 | | 6.2 | |
| Corporate and financial companies | 851 | | 977 | | 126 | | 14.8 | |
| Consolidation
adjustment | (14,349 | ) | (19,773 | ) | (5,424 | ) | (37.8 | ) |
| | 57,545 | | 73,728 | | 16,183 | | 28.1 | |

Enis net sales from operations (revenues) for 2005 were euro 73,728 million, up euro 16,183 million from 2004, or 28.1%, reflecting primarily higher product prices and volumes sold in all of Enis main operating segments. Revenues generated by the Exploration & Production segment were euro 22,477 million, up euro 7,131 million, or 46.5%, reflecting primarily higher prices realized in dollars (oil up 41.3%, natural gas up 15.6%) combined with increased production volumes sold (38.3 million boe, or 6.7%). Revenues generated by the Gas & Power segment were euro 22,969 million, up euro 5,667 million, or 32.8%, reflecting primarily increased natural gas prices and increased sales volumes of natural gas (4.29 billion cubic meters, or 5.9%) and higher sold production of electricity (up 8.92 terawatthour, or 64.4%). Revenues generated by the Refining & Marketing segment were euro 33,732 million, up euro 7,643 million, or 29.3%, reflecting primarily higher international prices for oil and refined products, offset in part by: (i) lower volumes sold on Italian retail and wholesale markets (down 1.1 million tonnes); (ii) the effect of the sale of LPG and refined product distribution activities in Brazil in August 2004; (iii) lower trading activities (down 1.3 million tonnes). Revenues generated by the Petrochemical segment were euro 6,255 million, up euro 924 million, or 17.3%, reflecting primarily the 12% increase in average selling prices and the 3.6% increase in sales volumes.

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Revenues generated by the Oilfield Services Construction and Engineering segment were euro 5,773 million, up euro 37 million, or 0.6%, primarily reflecting an increased activity level. Revenues generated by the Corporate and financial companies segments were euro 977 million, up euro 126 million, or 14.8%. In 2005 the Corporate started supplying certain central services amounting to euro 76 million to a merged subsidiary, Italgas Più belonging to the Gas & Power segment. Other increases in revenues were essentially related to: (i) IT services (euro 27 million); (ii) general services such as activities related to real estate rentals and maintenance, fleet of cars, companys aircrafts, etc (euro 21 million); (iii) communication and advertisement (euro 12 million) relating in particular to the advertising campaign to relaunch the Italgas Più brand.

Other income and revenues (million euro) 2004 2005 Change

Income from contractual obligations	43	114	71
Income
from rentals	93	102	9
Income from damage payments	87	89	2
Gains on
commodity derivative financial contracts	61		(61	)
Gains on divestment of tangible and intangible
assets	407	71	(336	)
Other
income (*)	686	422	(264	)
	1,377	798	(579	)

(*) Each amount in this line item is lower than euro 25 million.

Other income and revenues for 2005 (euro 798 million) declined by euro 579 million, down 42%, principally due to lower gains on asset divestment in relation to the fact that in 2004 gains on the sale of mineral assets were recorded by the Exploration & Production segment for euro 373 million, and the fact that starting in 2005 derivative contracts on commodities were accounted for under IFRS No. 32 and 39 4 .

Operating expenses (million euro) 2004 2005 Change % Ch.

Purchases, services and other	38,347	48,567	10,220	26.7
Payroll
and related costs	3,245	3,351	106	3.3
	41,592	51,918	10,326	24.8

Operating expenses for 2005 (euro 51,918 million) were up euro 10,326 million from 2004, or 24.8%, reflecting primarily: (i) higher prices for oil-based and petrochemical feedstocks and for natural gas; (ii) higher environmental provisions (euro 532 million in 2005), recorded in particular in the Other activities and the Refining & Marketing segment; (iii) a provision to the risk reserve concerning the fine imposed on 15 February 2006 by the Antitrust Authority and the estimated impact of the application of Decision No. 248/2004 of the Authority for electricity and gas from 1 January 2005 (euro 515 million); (iv) a euro 87 million increase in insurance charges 5 deriving from the extra premium due for 2005 and for the next five years (assuming normal accident rates) related to the participation of Eni to Oil Insurance Ltd. These higher charges took account of the exceptionally high rate of accidents in the two-year period 2004-2005; (v) higher charges pertaining to risks on certain legal proceedings and contractual obligations (euro 58 million). These increases were partially offset by the sale of activities in Brazil in August 2004.

| (4) | According to
these new accounting standards gains or losses on
derivative financial contracts used to manage exposure to
fluctuations in commodity prices are accounted as
financial income. |
| --- | --- |
| (5) | Eni jointly with other
oil companies belongs to Mutua Assicurazioni Oil
Insurance Ltd; the increase in insurance charges is
related to the exceptionally high accident rate of the
2004-2005 period, which caused an extra insurance premium
due for 2005, in addition to a provision calculated on
the basis of the expected rise in insurance premiums due
for the next five-year period assuming a normal rate of
accidents. |

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Labor costs (euro 3,351 million) were up euro 106 million, or 3.3%, reflecting primarily an increase in unit labor cost in Italy, offset in part by a decline in the average number of employees in Italy and the effect of the sale of refined product distribution activities in Brazil.

Depreciation, amortization and writedowns (million euro) 2004 2005 Change % Ch.

Exploration & Production	3,047	3,944		897		29.4
Gas &
Power	637	684		47		7.4
Refining & Marketing	465	462		(3	)	(0.6	)
Petrochemicals	114	118		4		3.5
Oilfield Services Construction and Engineering	184	176		(8	)	(4.3	)
Other
activities	45	31		(14	)	(31.1	)
Corporate and financial companies	106	98		(8	)	(7.5	)
Unrealized
profit in inventory		(4	)	(4	)
Total depreciation and amortization	4,598	5,509		911		19.8
Writedowns	333	272		(61	)	(18.3	)
	4,931	5,781		850		17.2

In 2005 depreciation and amortization charges (euro 5,509 million) were up euro 911 million, or 19.8%, from 2004 mainly in the Exploration & Production segment (up euro 897 million) reflecting primarily: (i) higher development costs for new fields and increased costs incurred to maintain production levels in certain mature fields; (ii) the effects of revised estimates of asset retirement obligations for certain fields; (iii) the impact of oil prices on amortizations in PSAs and buy-back contracts; (iv) higher production; and (v) higher exploration costs (up euro 50 million). In the Gas & Power segment amortization charges increased by euro 47 million due to the coming on stream of the Greenstream gasline and new power generation capacity. Writedowns (euro 272 million) concerned essentially the Exploration & Production (euro 156 million), the Other activities (euro 75 million) and the Petrochemical segments (euro 29 million).

Operating profit by segment (million euro) 2004 2005 Change % Ch.

| Exploration & Production — Gas &
Power | 8,185 — 3,428 | | 12,574 — 3,321 | | 4,389 — (107 | ) | 53.6 — (3.1 | ) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Refining & Marketing | 1,080 | | 1,857 | | 777 | | 71.9 | |
| Petrochemicals | 320 | | 202 | | (118 | ) | (36.9 | ) |
| Oilfield Services Construction and Engineering | 203 | | 307 | | 104 | | 51.2 | |
| Other
activities (1) | (395 | ) | (902 | ) | (507 | ) | (128.4 | ) |
| Corporate and financial companies | (363 | ) | (391 | ) | (28 | ) | (7.7 | ) |
| Unrealized
profit in inventory (1) | (59 | ) | (141 | ) | (82 | ) | | |
| Operating profit | 12,399 | | 16,827 | | 4,428 | | (35.7 | ) |
| Operating profit | 12,399 | | 16,827 | | 4,428 | | 35.7 | |
| Exclusion
of inventory holding (gain) loss | (448 | ) | (1,210 | ) | (762 | ) | | |
| Replacement cost operating profit | 11,951 | | 15,617 | | 3,666 | | 30.7 | |
| Exclusion
of special items | 631 | | 1,941 | | 1,310 | | | |
| Adjusted operating profit | 12,582 | | 17,558 | | 4,976 | | 39.5 | |

(1) Unrealized profit in inventory concerned intersegment sales of goods and services.

Contents

Exploration & Production (million euro) 2004 2005 Change % Ch.

Operating profit	8,185	12,574	4,389	53.6
Exclusion
of inventory holding (gain) loss
Replacement cost operating profit	8,185	12,574	4,389	53.6
Exclusion
of special items	17	309	292
Adjusted operating profit	8,202	12,883	4,681	57.1

Operating profit for 2005 was euro 12,574 million, up euro 4,389 million from 2004, or 53.6%, reflecting primarily: (i) higher oil and gas realizations in dollars (oil up 41.3%, natural gas up 15.6%); (ii) higher production volumes sold (up 38.3 million boe, or 6.7%); (iii) lower asset impairment charges (euro 40 million). These positive factors were offset in part by: (i) higher operating costs and amortization charges; (ii) net gains on divestments recorded in 2004 (euro 320 million); (iii) higher insurance charges.

Gas & Power (million euro) 2004 2005 Change % Ch.

Operating profit	3,428		3,321		(107	)	(3.1	)
Exclusion
of inventory holding (gain) loss	(12	)	(127	)	(115	)	..
Replacement cost operating profit	3,416		3,194		(222	)	(6.5	)
Exclusion
of special items	32		337		305		..
Adjusted operating profit	3,448		3,531		83		2.4

Replacement cost operating profit in 2005 was euro 3,194 million, down euro 222 million from 2004, or 6.5%, reflecting primarily: (i) a provision to the risk reserve concerning the fine imposed on 15 February 2006 by the Antitrust Authority (euro 290 million) and the estimated impact of the application of Decision No. 248/2004 of the Authority for Electricity and Gas from 1 January 2005 affecting natural gas prices to residential customer and wholesalers (euro 225 million); (ii) weaker realized margins on natural gas sales related to competitive pressure offset in part by the different trends in the energy parameters to which natural gas sale and purchase prices are contractually indexed; (iii) higher provisions to the risk reserve (euro 46 million). These negative factors were offset in part by: (i) increased natural gas sales volumes (up 6.13 billion cubic meters including own consumption, or 8%) and higher natural gas volumes distributed; (ii) a higher operating profit in natural gas transport activities outside Italy. Operating profit of power generation activities doubled to euro 138 million, up euro 77 million, reflecting primarily an increase in sold production of electricity (8.92 terawatthour, up 64.4%), offset in part by a decline in realized margins related to the different trend in contractual prices of energy parameters for the determination of selling prices and the cost of fuels.

Refining & Marketing (million euro) 2004 2005 Change % Ch.

| Operating profit — Exclusion
of inventory holding (gain) loss | 1,080 — (393 | 1,857 — (1,064 | 777 — (671 | ) |
| --- | --- | --- | --- | --- |
| Replacement cost operating profit | 687 | 793 | 106 | 15.4 |
| Exclusion
of special items | 236 | 421 | 185 | |
| Adjusted operating profit | 923 | 1,214 | 291 | 31.5 |

Replacement cost operating profit in 2005 was euro 793 million, up euro 106 million from 2004, or 15.4%, reflecting primarily: (i) higher realized margins in refining (the margin on Brent was up 1.43 dollars/barrel, or 32.9%) combined with higher processing and an improvement in the mix of refined products obtained, the effect of which was offset in part by the impact of the standstill of the Gela refinery in the first part of 2005 owing to

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the damage caused by a seastorm in December 2004; (ii) higher operating profit in distribution activities in Italy; (iii) an increase in operating results of refining and marketing activities in the rest of Europe related to a positive scenario and to increased marketing sales volumes. These positive factors were offset in part by a euro 185 million increase in special charges related in particular to higher environmental provisions and higher insurance costs and the effect of the sale of Agip do Brasil (euro 28 million) in August 2004.

Petrochemicals (million euro) 2004 2005 Change % Ch.

Operating profit	320		202		(118	)	(36.9	)
Exclusion
of inventory holding (gain) loss	(43	)	(19	)	24
Replacement cost operating profit	277		183		(94	)	(33.9	)
Exclusion
of special items	(14	)	78		92		..
Adjusted operating profit	263		261		(2	)	(0.8	)

Replacement cost operating profit for 2005 was euro 183 million, down euro 94 million from 2004, or 33.9%, reflecting primarily: (i) higher special charges (euro 92 million) recorded in connection with the restructuring of the Champagnier plant in view of its shutdown, provisions for litigation and higher insurance costs; (ii) lower product margins in basic petrochemicals reflecting higher oil-based feedstock purchase costs not fully recovered in selling prices, partly offset by higher margins in elastomers and polyethilene. These negative factors were offset in part by higher sales volumes (up 3.6%) and an improved industrial performance. Oilfield Services Construction and Engineering Operating profit for 2005 was euro 307 million, up euro 104 million, or 51.2% over 2004. The oilfield services and construction business reported an operating profit of euro 306 million, up euro 37 million, or 13.8%, achieved in the following areas: (i) Offshore construction area, reflecting higher profitability of certain projects in North Africa upon their completion; (ii) Onshore drilling area, reflecting an higher activity levels; (iii) Offshore drilling area, reflecting higher profitability of the submersible platform Scarabeo 6, in connection with a tariff increase, higher utilization rate of the submersible platform Scarabeo 4 and of the jack-up Perro Negro 5. Such gains were partially offset by higher costs on projects in progress in the LNG area and the fact that for 2004 the Leased FPSO area recorded an income relating essentially to a contract for the recovery of oil spilled from the Prestige tanker. The engineering business reported an operating profit of euro 1 million, an increase of euro 67 million over 2004, arising from the higher profitability of certain contracts in addition to the share of earnings from certain projects acquired in early 2005. Other Activities These activities reported an operating loss of euro 902 million, down euro 507 million, or 128% over 2004, due essentially to a euro 504 million increase in Syndials operating loss referring to: (i) higher provisions for environmental liabilities of euro 328 million reflecting primarily the clean up of the Porto Marghera site and the settlement agreed with certain Italian Authorities for the environmental damages and remediation of the same site, the reclamation of areas belonging to the Mantova plant and the dismantling of inactive plants and tanks in the Porto Torres site; (ii) provisions for contractual risks (euro 71 million) and litigations (euro 40 million); (iii) higher asset impairments (up euro 56 million from euro 19 million to euro 75 million); impairments in 2005 related in particular to the Scarlino and Porto Torres plants, up euro 44 million and euro 19 million, respectively. Corporate and financial companies These activities reported an operating loss of euro 391 million, down euro 28 million, or 7.7%, due essentially to an increase in IT costs, up euro 48 million, arising from higher activity levels, and institutional communication costs, up euro 7 million. These negative factors were partly offset by lower environmental provisions. Net financial expense In 2005 net financial expense (euro 366 million) was up euro 210 million from 2004, or 135%, due to charges pertaining to the evaluation of derivative financial contracts at fair value and to higher interest rate charges on dollar loans (Libor up 2 percentage points), the effects of which were offset in part by a decrease in average net borrowings and the fact that in 2004 a euro 62 million provision to the risk reserve was recorded in

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connection to the sale of a financing receivable from Albacom to British Telecom. Net income from investments Net income from investments in 2005 was euro 914 million and concerned primarily: (i) Enis share of income of affiliates accounted for under the equity method (euro 737 million), in particular affiliates in the Gas & Power (euro 358 million) and Refining & Marketing (euro 194 million) segments; (ii) gains on disposal (euro 179 million) relating in particular to the sale of 100% of IP (euro 132 million) and a 2.33% stake in Nuovo Pignone Holding SpA (euro 24 million); (iii) dividends received by affiliates accounted for under the cost method (euro 33 million). The euro 94 million increase in net income from investments was due essentially to improved results of operations of affiliates in the Gas & Power segment, in particular Galp Energia SGPS SA (Enis interest 33.34%), UniÓn Fenosa Gas SA (Enis interest 50%) and Blue Stream Pipeline Co BV (Enis interest 50%) as well as the fact that in 2004 a euro 41 million impairment was recorded in connection with the divestment of Enis 35% interest in Albacom. These increases were offset in part by lower gains on disposal (euro 257 million) related to the fact that in 2004 the gains on the sale of 9.054% of the share capital of Snam Rete Gas, of 100% of Agip do Brasil and other minor assets were recorded for a total of euro 437 million, as compared to the euro 179 million gain recorded in 2005. Income taxes Income taxes were euro 8,128 million, up euro 2,606 million from 2004, or 47.2% and reflected primarily higher income before taxes (euro 4,312 million). The Group tax rate increased 4.5 percentage points to 46.8% (42.3% in 2004). There were three factors behind this increase. Firstly, profit for the year was adversely impacted by higher fiscally non-deductible charges pertaining to provisions to the risk reserve and asset impairment. Secondly, the Group tax rate for the year 2005 benefited from an higher share of non-taxable income pertaining in particular to gains on disposals. The third factor was the higher share of profit before income taxes earned by subsidiaries in the Exploration & Production segment operating in Countries where the statutory tax rate is higher than the Group tax rate. Minority interests Minority interests were euro 459 million and concerned primarily Snam Rete Gas SpA (euro 321 million) and Saipem (euro 115 million). Reconciliation of reported operating profit by segment and net profit to adjusted operating and net profit Adjusted operating profit and net profit are before inventory holding gains or losses and special items. Information on adjusted operating profit and net profit is presented to help distinguish the underlying trends for the companys core businesses and to allow financial analysts to evaluate Enis trading performance on the basis of their forecasting models. These financial measures are not GAAP measures under either IFRS or U.S. GAAP; they are used by management in evaluating Group and Divisions performance. Replacement cost net profit and operating profit reflect the current cost of supplies. The replacement cost net profit for the period is arrived at by excluding from the historical cost net profit the inventory holding gain or loss, which is the difference between the cost of sales of the volumes sold in the period based on the cost of supplies of the same period and the cost of sales of the volumes sold in the period calculated using the weighted-average cost method of inventory accounting. Certain infrequent or unusual incomes or charges are recognized as special items because of their significance. Special items also include certain amounts not reflecting the ordinary course of business, such as environmental provisions or restructuring charges, and asset impairments or write ups and gains or losses on divestments even though they occurred in past exercises or are likely to occur in future ones. For a reconciliation of adjusted operating profit and net profit to reported operating profit and net profit see tables below.

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2005

(million euro) Reported operating and net profit Exclusion of inventory holding (gain) loss Replacement cost operating profit and net profit Exclusion of special items Adjusted operating profit and net profit

| Operating profit — Exploration
& Production | 12,574 | | | 12,574 | | 309 | 12,883 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Gas & Power | 3,321 | (127 | ) | 3,194 | | 337 | 3,531 | |
| Refining
& Marketing | 1,857 | (1,064 | ) | 793 | | 421 | 1,214 | |
| Petrochemicals | 202 | (19 | ) | 183 | | 78 | 261 | |
| Oilfield
Services Construction and Engineering | 307 | | | 307 | | 6 | 313 | |
| Other activities | (902 | ) | | (902 | ) | 646 | (256 | ) |
| Corporate and
financial companies | (391 | ) | | (391 | ) | 144 | (247 | ) |
| Unrealized profit in inventory | (141 | ) | | (141 | ) | | (141 | ) |
| | 16,827 | (1,210 | ) | 15,617 | | 1,941 | 17,558 | |
| Net profit | 8,788 | (759 | ) | 8,029 | | 1,222 | 9,251 | |

2004

| Operating profit — Exploration
& Production | 8,185 | | | 8,185 | | 17 | | 8,202 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Gas & Power | 3,428 | (12 | ) | 3,416 | | 32 | | 3,448 | |
| Refining
& Marketing | 1,080 | (393 | ) | 687 | | 236 | | 923 | |
| Petrochemicals | 320 | (43 | ) | 277 | | (14 | ) | 263 | |
| Oilfield
Services Construction and Engineering | 203 | | | 203 | | 12 | | 215 | |
| Other activities | (395 | ) | | (395 | ) | 172 | | (223 | ) |
| Corporate
and financial companies | (363 | ) | | (363 | ) | 176 | | (187 | ) |
| Unrealized profit in inventory | (59 | ) | | (59 | ) | | | (59 | ) |
| | 12,399 | (448 | ) | 11,951 | | 631 | | 12,582 | |
| Net profit | 7,059 | (281 | ) | 6,778 | | (133 | ) | 6,645 | |

Analysis of special items (million euro) 2004 2005

| Environmental
provisions — Provisions to the risk reserve | 303 — 234 | | 835 — 379 | |
| --- | --- | --- | --- | --- |
| Mineral
and other asset impairments | 336 | | 363 | |
| Antitrust fine | 5 | | 290 | |
| Provisions
for redundancy incentives | 65 | | 79 | |
| Net gains on E&P portfolio rationalization | (320 | ) | | |
| Other | 8 | | (5 | ) |
| Special items of operating profit | 631 | | 1,941 | |
| (Income)
expense from investments | (390 | ) | (137 | ) |
| - Gain on the sale of a 9.054% stake of Snam
Rete Gas | (308 | ) | | |
| - Gain
on the sale of Agip do Brasil SA | (94 | ) | | |
| - Gain on the sale of IP | | | (132 | ) |
| Other | | | 27 | |
| Special items before income taxes | 241 | | 1,831 | |
| Income
taxes on special items | (374 | ) | (609 | ) |
| Total special items | (133 | ) | 1,222 | |

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Adjusted operating profit and net profit (million euro) 2004 2005 Change % Ch.

| Exploration
& Production — Gas & Power | 8,202 — 3,448 | | 12,883 — 3,531 | | 4,681 — 83 | | 57.2 — 2.4 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Refining
& Marketing | 923 | | 1,214 | | 291 | | 31.5 | |
| Petrochemicals | 263 | | 261 | | (2 | ) | (0.8 | ) |
| Oilfield
Services Construction and Engineering | 215 | | 313 | | 98 | | 45.6 | |
| Other activities | (223 | ) | (256 | ) | (33 | ) | (14.8 | ) |
| Corporate
and financial companies | (187 | ) | (247 | ) | (60 | ) | (32.1 | ) |
| Unrealised profit in inventory | (59 | ) | (141 | ) | (82 | ) | | |
| Adjusted
operating profit | 12,582 | | 17,558 | | 4,979 | | 39.5 | |
| Adjusted net profit | 6,645 | | 9,251 | | 2,606 | | 39.2 | |

Consolidated balance sheet (million euro) 31 Dec. 2004 31 Dec. 2005 Change

| Fixed
assets — Property, plant and equipment, net | 40,586 | | 45,013 | | 4,427 | |
| --- | --- | --- | --- | --- | --- | --- |
| Compulsory
stock | 1,386 | | 2,194 | | 808 | |
| Intangible assets, net | 3,313 | | 3,194 | | (119 | ) |
| Investments,
net | 3,685 | | 4,311 | | 626 | |
| Accounts receivable financing and securities
related to operations | 695 | | 775 | | 80 | |
| Net
accounts payable in relation to capital expenditure | (888 | ) | (1,196 | ) | (308 | ) |
| | 48,777 | | 54,291 | | 5,514 | |
| Working
capital, net | (1,812 | ) | (3,568 | ) | (1,756 | ) |
| Employee termination indemnities and other
benefits | (982 | ) | (1,031 | ) | (49 | ) |
| Capital
employed, net | 45,983 | | 49,692 | | 3,709 | |
| Shareholders equity including minority
interests | 35,540 | | 39,217 | | 3,677 | |
| Net
borrowings | 10,443 | | 10,475 | | 32 | |
| Total liabilities and shareholders
equity | 45,983 | | 49,692 | | 3,709 | |
| EUR/USD exchange rate at 31 December | 1.362 | | 1.180 | | (0.182 | ) |

The depreciation of the euro over other currencies, in particular the US dollar (down 13.4% from 31 December 2004) determined with respect to year-end 2004 an increase of approximately euro 2,700 million, euro 1,500 million and euro 1,200 million, respectively, in net capital employed, net equity and net borrowings, as a result of currency translation effects. At 31 December 2005, net capital employed totaled euro 49,692 million, representing an increase of euro 3,709 million from 31 December 2004, due mainly to an increase in fixed assets reflecting capital expenditure, an increase in compulsory stock relating essentially to higher international oil and refined products prices and currency translation effects. These increases were offset in part by depreciation, amortization and impairment charges for the period (euro 5,781 million) and by a euro 1,756 million decrease in net working capital. The share of the Exploration & Production, Gas & Power and Refining & Marketing segments on net capital employed was 91% (the same as at 31 December 2004). At 31 December 2005, Enis leverage (ratio of net borrowings to shareholders equity including minority interest) was 0.27, compared with 0.29 at 31 December 2004. Property, plant and equipment (euro 45,013 million) were primarily related to the Exploration & Production (54.4%), Gas & Power (30.6%) and Refining & Marketing (7.9%) segments. Provisions for depreciation, amortization and writedowns (euro 45,698 million) represented 50.4% of gross property, plant and equipment (49.4% at 31 December 2004). Investments in unconsolidated subsidiaries and affiliates (euro 4,311 million) consisted primarily of

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33.34% of Galp Energia SGPS SA (euro 896 million),50% of UniÓn Fenosa Gas SA (euro 459 million), 50% of Blue Stream Pipeline Co BV (euro 280 million), 49% of Greek natural gas secondary distribution companies EPA Thessaloniki and Thessaly (euro 191 million), 50% of Raffineria di Milazzo ScpA (euro 172 million), 50% of EnBW - Eni Verwaltungsgesellschaft mbH (euro 168 million), 33.33% of United Gas Derivatives Co (euro 128 million), 12.04% of Darwin LNG Pty Ltd (euro 126 million), 49% of Super Octanos CA (euro 113 million), 10.4% of Nigeria LNG Ltd (euro 100 million), 20% of Fertilizantes Nitrogenados de Oriente CEC (euro 92 million), 89% of Trans Austria Gasleitung GmbH (euro 88 million), 35.2% of Supermetanol CA (euro 88 million) and 50% of Unimar Llc (euro 84 million). Accounts receivable financing and securities related to operations (euro 775 million) were made up primarily of loans made by Enis financial subsidiaries to certain affiliates in relation to capital expenditure projects made on behalf of Enis subsidiaries operating in particular in the Gas & Power (euro 499 million) and Exploration & Production segments (euro 170 million). Net equity at 31 December 2005 (euro 39,217 million) was up euro 3,677 million from 31 December 2004, due primarily to net profit before minority interest (euro 9,247 million) and currency translation effects (approximately euro 1,500 million), offset in part by the payment of Enis 2004 dividends and 2005 interim dividends and Snam Rete Gas extraordinary dividend (euro 6,287 million, of which euro 5,070 million by Eni SpA and euro 1,171 million by Snam Rete Gas SpA) and the purchase of own shares (euro 1,034 million).

Net working capital (million euro) 31 Dec. 2004 31 Dec. 2005 Change

| Inventories — Trade
accounts receivable | 2,847 — 10,525 | | 3,563 — 14,101 | | 716 — 3,576 | |
| --- | --- | --- | --- | --- | --- | --- |
| Trade accounts payable | (5,837 | ) | (8,170 | ) | (2,333 | ) |
| Taxes
payable and reserve for net deferred income tax
liabilities | (3,056 | ) | (4,857 | ) | (1,801 | ) |
| Reserve for contingencies | (5,736 | ) | (7,679 | ) | (1,943 | ) |
| Other
operating assets and liabilities (1) | (555 | ) | (526 | ) | 29 | |
| | (1,812 | ) | (3,568 | ) | (1,756 | ) |

(1) Include operating financing receivables and securities related to operations for euro 492 million (euro 510 million at 31 December 2004) and securities covering technical reserves of Padana Assicurazioni SpA for euro 453 million (euro 474 million at 31 December 2004).

Inventories increased by euro 716 million due mainly to the impact of increased international oil and refined products prices on the evaluation of inventories according to the weighted-average cost method of inventory accounting. Trade accounts receivable increased by euro 3,576 million due mainly to the impact of increased international oil and refined product prices, growth in sales volumes of oil and natural gas and currency translation effects. This increase related in particular to the Gas & Power (up euro 1,671 million), Refining & Marketing (up euro 1,010 million) and the Exploration & Production (up euro 806 million) segments. Trade accounts payable increased by euro 2,333 million for the same reasons as trade accounts receivable. Tax liabilities and the reserve for net deferred income tax liabilities increased by euro 1,801 million reflecting primarily the increase in: (i) income tax liabilities and net deferred tax liabilities (euro 1,434 million); (ii) excise taxes, custom duties payable and other (euro 367 million) reflecting primarily higher activity levels. The reserve for contingencies (euro 7,679 million) included the site restoration and abandonment reserve of euro 2,648 million (euro 1,967 million at 31 December 2004), the environmental risk reserve of euro 2,103 million (euro 1,649 million at 31 December 2004), the loss adjustment and actuarial reserve for Padana Assicurazioni SpA of euro 707 million (euro 573 million at 31 December 2004), the reserve for contract penalties and legal matters of euro 534 million (euro 208 million at 31 December 2004), also including a euro 290 million charge pertaining to a fine imposed by the Italian regulator in the natural gas activities, the reserve for the revision of selling prices for certain supply contracts of euro 321 million, the reserve for fiscal disputes of euro 309 million (euro 235 million at 31 December 2004), the reserve for divestments and restructuring of euro 195 million (euro 214 million at 31 December 2004), the reserve for OIL insurance of euro 127 million (euro 91 million at 31 December 2004) and the reserve for losses related to investments of euro 85 million (euro 91 million at 31 December 2004).

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Net borrowings (million euro) 31 Dec. 2004 31 Dec. 2005 Change

| Debts and
bonds — Cash and cash equivalents | 12,684 — (1,003 | ) | 12,998 — (1,333 | ) | 314 — (330 | ) |
| --- | --- | --- | --- | --- | --- | --- |
| Securities
not related to operations | (793 | ) | (931 | ) | (138 | ) |
| Non-operating financing receivable | (251 | ) | (259 | ) | (8 | ) |
| Other
items | (194 | ) | | | 194 | |
| | 10,443 | | 10,475 | | 32 | |

Net borrowings at 31 December 2005 amounted to euro 10,475 million, a euro 32 million increase with respect to 31 December 2004. Debts and bonds totalled euro 12,998 million, of which euro 5,345 million were short-term (including the portion of long-term debt due within twelve months for euro 733 million) and euro 7,653 million were long-term. Bonds outstanding at 31 December 2005 amounted to euro 5,339 million (including accrued interest and discount). Bonds maturing in the next 18 months amounted to euro 436 million (including accrued interest and discount). Bonds issued in 2005 amounted to euro 441 million (including accrued interest and discount). Debts and bonds for euro 12,998 million were denominated for 72% in euro, for 16% in US dollar, for 8% in pound sterling and the remaining 4% in other currencies.

Reclassified cash flow statement and change in net borrowings (million euro) 2004 2005 Change

Net profit before minority interest	7,541		9,247		1,706
Adjustments
to reconcile to cash generated from operating income
before changes in working capital:
- amortization and depreciation and other non
monetary items	5,092		6,518		1,426
- net
gains on the disposal of assets	(793	)	(220	)	573
- dividends, interest, extraordinary income
(expense)	5,740		8,471		2,731
Cash
generated from operating income before changes in working
capital	17,580		24,016		6,436
Changes in working capital related to operations	(909	)	(2,422	)	(1,513	)
Dividends
received, taxes paid, interest (paid) received	(4,171	)	(6,658	)	(2,487	)
Net cash provided by operating activities	12,500		14,936		2,436
Capital
expenditure	(7,499	)	(7,414	)	85
Investments	(316	)	(127	)	189
Disposals	1,547		542		(1,005	)
Other cash flow related to capital expenditure,
investments and disposals	97		293		196
Free
cash flow	6,329		8,230		1,901
Borrowings (repayment) of debt related to
financing activities	211		(10 9	)	(320	)
Changes in
short and long-term financial debt	(3,743	)	(540	)	3,203
Dividends paid and changes in minority interests
and reserves	(3,175	)	(7,284	)	(4,109	)
Effect of
changes in consolidation and exchange differences	(55	)	33		88
NET CASH FLOW FOR THE PERIOD	(433	)	330		763
Free
cash flow	6,329		8,230		1,901
Net borrowings of acquired companies	0		(19	)	(19	)
Net
borrowings of divested companies	190		21		(169	)
Exchange differences on net borrowings and other
changes	(64	)	(980	)	(916	)
Dividends
paid and changes in minority interests and reserves	(3,175	)	(7,284	)	(4,109	)
CHANGE IN NET BORROWINGS	3,280		(32	)	(3,312	)

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Cash flow generated by operating activities (euro 14,936 million) and cash from disposals (euro 563 million, including net borrowings transferred of euro 21 million) were offset in part by: (i) financial requirements for capital expenditure and investments (euro 7,560 million including a net borrowing acquired of euro 19 million); the payment of dividends (euro 6,287 million) and the share buy-back program (euro 1,034 million); (ii) currency translation effects (about euro 1,200 million).

Capital expenditure (million euro) 2004 2005 Change % Ch.

| Exploration
& Production | 4,853 | 4,964 | 111 | | 2.3 | |
| --- | --- | --- | --- | --- | --- | --- |
| Gas & Power | 1,451 | 1,152 | (299 | ) | (20.6 | ) |
| Refining
& Marketing | 693 | 656 | (37 | ) | (5.3 | ) |
| Petrochemicals | 148 | 112 | (36 | ) | (24.3 | ) |
| Oilfield
Services Construction and Engineering | 186 | 349 | 163 | | 87.6 | |
| Other activities | 49 | 69 | 20 | | 40.8 | |
| Corporate
and financial companies | 119 | 112 | (7 | ) | (5.9 | ) |
| Capital expenditure (1) | 7,499 | 7,414 | (85 | ) | (1.1 | ) |

(1) Does not include R&D costs the effects of which are limited to one year amounting to euro 210 million and euro 202 million in 2004 and 2005, respectively.

Capital expenditure amounted to euro 7,414 million, of which 91% related to the Exploration & Production, Gas & Power and Refining & Marketing segments, and primarily related to: (i) the development of oil and gas reserves (euro 3,952 million) in particular in Kazakhstan, Libya, Angola, Italy and Egypt, exploration projects (euro 656 million) and the purchase of proved and unproved property (euro 301 million); (ii) upgrading of Enis natural gas transport and distribution networks in Italy (euro 825 million); (iii) the continuation of the construction of combined cycle power plants (euro 239 million); (iv) actions for improving flexibility and yields of refineries, including the completion of the construction of the tar gasification plant at the Sannazzaro refinery, and the upgrade of the refined product distribution network in Italy and in the rest of Europe (overall euro 656 million); (v) upgrading of vessels and other equipment and facilities in Kazakhstan and West Africa in the Oilfield services and construction business (euro 346 million). Dividends paid and changes in minority interests and reserves (euro 7,278 million) related mainly to dividend distribution for fiscal year 2004 of euro 3,384 million and the payment of an interim dividend of euro 1,686 million carried out by Eni SpA, the payment of dividend by Snam Rete Gas SpA (euro 1,171 million of which euro 976 million as an extraordinary dividend) and other consolidated subsidiaries (euro 9 million) and the buy-back program. From 1 January to 31 December 2005 a total of 47.06 million own shares were purchased for a total expense of euro 1,034 million (on average euro 21.966 per share). From the beginning of the share buy-back plan (1 September 2000) Eni purchased 281.88 million of its own shares, equal to 7.04% of its share capital, for a total expense of euro 4,272 million (on average euro 15.155 per share). Disposals (euro 563 million, including net borrowings transferred of euro 21 million) concerned mainly the sale of Enis 100% interest in IP (142 million, excluding transferred cash of euro 53 million), the sale of Enis 28% in Erg Raffinerie Mediterranee Srl (euro 97 million), 67.05% interest in Società Azionaria per la Condotta di Acque Potabili (euro 100 million including net borrowings transferred of euro 21 million) and 100% of Acquedotto Vesuviano (euro 16 million) as well as other minor interests and real estate.

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Other Information

Transactions with related parties In the ordinary course of its business, Eni enters into transactions concerning the exchange of goods, provision of services and financing with non consolidated subsidiaries and affiliates as well as other companies owned or controlled by the Italian Government. All such transactions are conducted on an arms length basis and in the interest of Eni companies. Amounts and types of trade and financial transactions with related parties are described in the Notes to the Financial Statements (Note No. 32). Court inquiries The Milan Public Prosecutor is inquiring on contracts awarded by Enis subsidiary EniPower and on supplies from other companies to EniPower. The media have provided wide coverage of these inquiries. It emerged that illicit payments have been made by EniPower suppliers to a manager of EniPower who has been immediately dismissed. The Court presented EniPower (commissioning entity) and Snamprogetti (contractor of engineering and procurement services) with notices of process in accordance with existing laws regulating administrative responsibility of companies (Legislative Decree No. 231/2001). In its meeting of 10 August 2004, Enis Board of Directors examined the situation mentioned above and approved the creation by Enis CEO of a task force in charge of verifying the compliance with Group procedures regarding the terms and conditions for the signing of supply contracts by EniPower and Snamprogetti and the subsequent execution of works. The Board also advised divisions and departments of Eni to fully cooperate in every respect with the Court. From the inquiries performed, that have not yet covered all relationships with contractors and suppliers, no default in the organization and internal controls emerged. For some specific aspects inquiries have been performed by external experts. In accordance with its transparency and firmness guidelines, Eni will take the necessary steps for acting as plaintiff in the expected legal action in order to recover any damage that might derive to Eni by the illicit behavior of its suppliers and of their and Enis employees. Within an investigation on two Eni managers, the Public Prosecutor of Rome on 10 March 2005 notified Eni of the seizure of papers concerning Enis relations with two oil product trading companies. TSKJ Consortium - Investigations of SEC and other Authorities In June 2004 the U.S. Securities and Exchange Commission (SEC) notified Eni a request of collaboration on a voluntary basis, which Eni promptly carried out, in order to obtain information regarding the TSKJ consortium in relation to the construction of natural gas liquefaction facilities at Bonny Island in Nigeria. The TSKJ consortium is formed by Snamprogetti (Eni 100%) with a 25% interest and, for the remaining part, by subsidiaries of Halliburton/KBR, Technip and JGC. The investigations of the Commission concern alleged improper payments. Other Authorities are currently investigating this matter. Eni is currently providing its own information to the Commission and to other authorities.

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Subsequent events Relevant subsequent events concerning operations are found in the operating review. Business trends The following are the forecasts for Enis key production and sales metrics in 2006: production of liquids and natural gas is forecasted to grow from 2005 (1.74 million boe/day). Increases will be achieved outside Italy mainly in Libya, Angola, Egypt, Nigeria and Norway; in particular natural gas production is expected to increase strongly in Libya due to the build-up of supplies to Italy through the Greenstream pipeline and in Egypt and Nigeria, due to the build-up of supplies to the Bonny (Enis interest 10.4%) liquefaction plant. Oil production is expected to increase in Nigeria and Norway due to full production of fields started-up in the second half of 2005; sales volumes of natural gas are expected to increase from 2005 (91.15 billion cubic meters 1 ). Sales volumes are expected to increase in markets outside Italy in particular in Turkey, Spain, France and Germany; sold production of electricity is expected to increase from 2005 (22.77 terawatthour) due to the continuing ramp-up of new production capacity at the Brindisi and Mantova sites, offset in part by lower production at the Ravenna and Ferrera Erbognone plants due to planned maintenance; refining throughputs on Enis account are expected to decline slightly from 2005 (38.79 million tonnes), due mainly to planned maintenance at the Sannazzaro, Taranto and Livorno refineries. Enis refineries are expected to run at full capacity; sales volumes of refined products on the Agip branded network in Italy are expected to remain stable (8.75 million tonnes in 2005): the impact of the expected decline in domestic consumption will be offset by a higher network performance. In the rest of Europe the upward trend of sales is expected to continue despite stagnation in the overall market; in particular higher sales are expected in Spain, France, Germany and Hungary also due to construction/acquisition of service stations. In 2006, capital expenditure is expected to increase from 2005 (euro 7.4 billion in 2005); main increases are expected in exploration projects and the development of oil and natural gas reserves, upgrading of natural gas transport and import infrastructure, upgrading of refineries.

(1) Include own consumption and Enis share of sales of affiliates.

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Corporate Governance

Appropriate conduct Due to the complex scenario in which Eni operates, the Board of Directors has deemed it appropriate to provide a clear definition of the value system that Eni recognizes, accepts and upholds and the responsibilities that Eni assumes within its Group and externally in order to ensure that all Group activities are conducted in compliance with laws, in a context of fair competition, with honesty, integrity, correctness and in good faith, respecting the legitimate interests of shareholders, employees, suppliers, customers, commercial and financial partners and the communities where Eni operates. All those working for Eni, without exception or distinction, are committed to observing these principles within their function and responsibility and to make others observe them. The belief of working for the advantage of Eni cannot be a justification for behaviors contrary to such principles. These values are stated in a Code of Conduct whose observance by employees is evaluated by the Board of Directors, based on the annual report of the Guarantor for the Code of Conduct. The Code of Conduct is published in Enis internet site. In its meeting of 20 January 2000 Enis Board of Directors resolved to adopt the Self-discipline Code of Listed Companies (the Code) and, pursuant to a thorough review of the matter, underscored how Enis organizational model is essentially in line with the principles expounded in the Code, as well as with related recommendations issued by Consob. In accordance with the request of Borsa Italiana SpA, in particular the Guidelines for the preparation of the yearly report on corporate governance of 12 February 2003, follows information on Enis corporate governance system. In preparing this report account has been taken also of the Guide to the preparation of the report on corporate governance published by Assonime and Emittenti Titoli SpA in March 2004. Enis organizational structure Enis organizational structure follows the traditional model of companies in which management is exclusively entrusted to the Board of Directors, which is the central element of Enis corporate governance system. Monitoring functions are entrusted to the Board of Statutory Auditors and accounting control is entrusted to external auditors appointed by the Shareholders Meeting. On 1 June 2005 the Board of Directors entrusted the Chairman with powers to conduct strategic international relations and appointed Paolo Scaroni Chief Executive Officer (CEO) entrusted with all managing powers except those that cannot be delegated and those reserved to the Board. According to article 25 of Enis by-laws, the Chairman and the CEO are the representatives of the company. In accordance with internationally accepted principles of corporate governance, the Board of Directors established committees with consulting and proposing functions. The Board of Directors Competencies In its meetings of 1 June and 11 October 2005, in addition to exclusive competencies entrusted to it by art. 2381 of the Civil Code, the Board of Directors has reserved the following tasks:

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to define corporate governance rules for the Company and Group companies, including the appointment, definition of functions and regulations of Board Committees; 2. to define guidelines for the internal control system, based on indications provided by the relevant Board Committee, and to monitor the effectiveness and modes of managing main corporate risks; 3. to examine and approve the main features of corporate and Group organization, checking the effectiveness of the organization and administration setup prepared by the CEO; 4. to determine on proposal of the CEO strategic guidelines and objectives at the Company and Group level; 5. to examine and approve multi-annual strategic, industrial and financial plans at the Company and Group level; 6. to examine and approve yearly budgets of Divisions, of the Company and the consolidated Group budget; 7. to evaluate and approve quarterly accounts and related disclosures and any other period accounts and related disclosures provided for by the law and to compare quarterly results with planned results; 8. to evaluate the general trends in operations with specific attention to possible conflicts of interest; 9. to examine and approve strategically relevant agreements; 10. to receive from Directors entrusted with specific powers timely reports describing the activities performed under such powers and the most relevant transactions, according to a specific previously agreed definition, and any atypical or unusual relations and transactions with related parties; 11. to receive from Board Committees periodic reports on activities performed, according to previously agreed definitions and timetables; 12. to attribute, modify and revoke powers to Directors, defining their limits and modes of execution, determining the compensation related to such powers, after consultation with the Board of Statutory Auditors. To deliver guidelines to empowered Directors and to recall to itself transactions included in the delegated power; 13. to approve, based on the indications of the relevant Committee, the adoption and implementation of share incentive plans and to define the compensation criteria of top managers; 14. to appoint, revoke and delegate powers to general managers, on proposal of the CEO and in agreement with the Chairman; 15. to decide major sale and purchase transactions of the Company and to provide a pre-emptive evaluation of those concerning Group companies, in particular: a) sale and purchase transactions, as well as conferral of real estate, investments, companies of amounts exceeding euro 50 million; b) capital expenditure in tangible and intangible assets with great significance for the Group in terms of strategic impact and risks, and however all those of amounts exceeding euro 100 million, as well as any portfolio and exploration initiatives of the Exploration & Production segment in new areas; c) the provision of loans from Eni or its subsidiaries to third parties; d) the provision from Eni of personal and real guarantees to third parties in the interest of Eni or its subsidiaries of amounts exceeding euro 50 million; e) the provision of loans from Eni or its subsidiaries to affiliates, as well as of real and personal guarantees on their bonds of amounts exceeding euro 50 million and, in any case, if the amount is not proportional to the stake held in the affiliate; f) purchase and sale agreements for goods and services not intended as capital expenditure of amounts exceeding euro 1 billion and of a duration longer than 20 years; 16. to examine and decide any proposal of the CEO concerning voting and appointment of members of the Board of Directors and the Board of Statutory Auditors of major subsidiaries; 17. to formulate all the proposals of decisions to be presented to the Shareholders Meeting. In accordance with article 27 of Enis by-laws, the Chairman chairs Shareholders Meetings, convenes and chairs Board of Directors meetings and oversees the implementation of decisions made by it. In accordance with article 23, paragraph 3 of Enis by-laws, the Chairman and the CEO report timely to the Board of Statutory Auditors, at least quarterly and at each Board meeting, on activities performed and major transactions of Eni and its subsidiaries. In accordance with article 2391 of the Italian Civil Code, Directors inform other Directors and the Board of Statutory Auditors of any interest they may have, directly or on behalf of third parties, in any transaction of Eni. Appointment In accordance with article 17 of Enis by-laws, the Board of Directors is made up by 3 to 9 members. The

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shareholders meeting determines the number within said limits. As per article 6, paragraph 2, letter d) of Enis by-laws the Minister for Economy and Finance, in agreement with the Minister of Productive Activities, may appoint one member of the Board without voting right in addition to those appointed by the shareholders meeting. The Minister for Economy and Finance chose not to appoint such member. The present Board of Directors is made up by 9 members appointed by the Shareholders Meeting of 27 May 2005 for a three-year term, their mandate expires with the Meeting convened to examine financial statements for fiscal year 2007. The appointment of the Board of Directors calls for a list vote. Only shareholders who, alone or with others represent at least 1% of voting shares at an ordinary meeting have the right to present lists for the appointment of directors, as well as the Board of Directors. Each shareholder can present or participate in presenting only one list. Companies controlling a shareholder and joint controlled companies cannot present, nor participate in presenting other lists, meaning by controlled companies the companies described in article 2359, paragraph 1 of the Civil Code. The lists must be deposited at Enis headquarters at least ten days before the date set for the Shareholders Meeting on first call (20 days in case of the Board of Directors presenting a list) and published on national newspapers and must include a resume of each candidate. Composition The current Board of Directors is formed by the Chairman, Roberto Poli, the CEO, Paolo Scaroni, and directors, Alberto Clô, Renzo Costi, Dario Fruscio, Marco Pinto, Marco Reboa, Mario Resca, and Pierluigi Scibetta. Roberto Poli, Paolo Scaroni, Dario Fruscio, Marco Pinto, Mario Resca and Pierluigi Scibetta were candidates included in the list of the Ministry of Economy and Finance; Alberto Clô, Renzo Costi and Marco Reboa were in the list presented by institutional investors coordinated by Fineco Asset Management SpA. The Secretary of the Board of Directors is Piergiorgio Ceccarelli, the Groups senior vice president for Corporate Affairs. Based on information received, follows information on positions held in other Board of Directors or Boards of Statutory Auditors of listed companies, financial or insurance or large companies by members of Enis Board of Directors. The professional curriculum of Directors is available on Enis internet site. ROBERTO POLI Chairman of Poli e Associati SpA; Board member of Mondadori SpA, Fininvest SpA, Merloni Termosanitari SpA and G.D. SpA; general partner of Brafin SapA. PAOLO SCARONI Chairman of Alliance UniChem; Board member of Il Sole 24 Ore; member of the Supervisory Board of ABN AMRO Bank, Board member of the Columbia Universitys Business School. ALBERTO CLô Board member of ASM Brescia SpA, De Longhi SpA, Italcementi SpA and Società Autostrade SpA. RENZO COSTI Board member of Editrice Il Mulino SpA. DARIO FRUSCIO Chairman of Italia Turismo SpA, Board member of Sviluppo Italia SpA. MARCO REBOA Board member of Seat PG SpA. Interpump SpA, IMMSI SpA, Intesa Private Banking, Statutory auditor of Autogrill SpA and Galbani SpA. MARIO RESCA Chairman of McDonalds Italia SpA and Italia Zuccheri SpA, Board member of Mondadori SpA, Special manager of the Cirio Del Monte Group, under special management. PIERLUIGI SCIBETTA Board member of Gestore del Mercato Elettrico SpA, Nucleco SpA and Istituto Superiore Prevenzione e Sicurezza Lavoro (ISPESL). On 1 June 2005, Enis Board of Directors, in accordance with the provisions of the Code, evaluated the statements presented by Board members and established that the Chairman and non executive Board members Alberto Clô, Renzo Costi, Dario Fruscio, Marco Pinto, Marco Reboa, Mario Resca, and Pierluigi Scibetta are independent as they do not have any economic relationship with Eni and Eni Group companies, with the CEO and with the Ministry of Economy and Finance, Enis major shareholder, such as to bias their autonomous judgment nor are they close relatives of the CEO. Director Marco Pinto is an employee of the Ministry for Economy and Finance. The CEO of Eni is an employee of Eni and holds the position of General Manager.

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On 30 March 2006, the Board verified that its members were independent on the basis of their own statements and that they possess the honorability required by articles 147 ter and 147 quinquies of Legislative Decree No. 58 of 24 February 1998 and included in Law No. 262 of 28 December 2005 (law for the protection of savings) and acknowledged that its members continued being independent as verified on 1 June 2005 and possessing the honorability required by Law. Enis by-laws do not indicate a specific frequency of meetings. In 2005 the Board of Directors met 21 times (18 in 2004) for an average length of four hours per meeting. The public is informed of: (i) the dates of meetings convened for the approval of interim results, (ii) the dates of general Shareholders Meetings, (iii) the dates when the amount of interim dividends and final dividends are announced and related payment dates. Functioning The Board of Directors defined the rules for the calling of its meetings; in particular, the Chairman convenes Board meetings, and, in concert with the CEO, defines agenda items. Notice is sent by mail, fax or e-mail within five days of the meetings date, at least 24 hours in advance in case of urgency. Enis by-laws allow meetings to be held by video or teleconference, provided that all participants can be identified and are allowed to participate in real time. The meeting is deemed held in the location where Chairman and Secretary are present. Board members receive in advance adequate and thorough information on all issues subject to Board evaluation and resolutions, except for urgent cases and those for which confidentiality is deemed necessary. During meetings directors can meet managers of Eni and its subsidiaries in order to obtain information on the features and the organization of their businesses. In 2005 on average 88% of Board members participated to Board meetings and 85% of independent non executive Board members. Compensation Board members compensation is determined by the Shareholders Meeting, while remuneration levels of the Chairman and CEO are determined by the Board of Directors, based on proposals of the Compensation Committee and after consultation with the Board of Statutory Auditors. On 27 May 2005 the Shareholders Meeting determined the annual compensation of the Chairman (euro 265,000) and of Board members (euro 115,000). It also determined a variable compensation up to a maximum of euro 80,000 for the Chairman and euro 20,000 for each Board member to be paid in accordance with Enis positioning as compared to the eight largest international oil companies for market capitalization in terms of total return to shareholders in the reference year. The variable portion of compensation is paid to the Chairman for euro 80,000 or euro 40,000 and to each Board member for euro 20,000 or euro 10,000, respectively, if Enis return to shareholders is rated first or second, or third or fourth in said rating. Below fifth position no variable compensation is paid. In the meeting of 30 March 2005, the Board confirmed that Eni in 2004 rated fourth in the mentioned positioning. With reference to the powers delegated to the Chairman and CEO, the Board of Directors determined their compensation, made up of a fixed and a variable part. The variable part of the compensation of Chairman and CEO, as well as the variable part of the compensation of Enis top management (General Managers of divisions and managers holding positions directly reporting to the Chairman and CEO) is related to the achievement of specific economic and operating objectives (profitability, leverage, efficiency, strategic projects) and share price objectives (price of Eni shares, comparative total return to shareholders). With reference to Enis performance in 2004, 47% of the remuneration of the Chairman and of the CEO was variable, 43% of that of the top management 1 . On 30 March 2006, Enis Board of Directors on proposal of the Compensation Committee and in analogy with what decided in its meeting of 14 July 2005 for the Chairman and the CEO, determined to extend to the other directors the insurance against professional risks included in agreements for Eni managers. Similar extension was decided also for Statutory Auditors and the Magistrate of the Court of Accounts delegated to the financial control of Eni. Total cost for Eni of this extension is about euro 14,000. Pursuant to article 78 of Consob Decision No. 11971 of 14 May 1999, compensation of directors and statutory auditors of Eni and general managers of Enis divisions, who held the position in 2005 including a fraction of the year, are reported in the table below. Pursuant to Consob decisions: - Compensation in respect of positions held at Eni SpA are set by the Shareholders Meeting and the remuneration of the chairman and the CEO is determined by the Board of Directors, in agreement

(1) These percentages were determined excluding the fixed part of the remuneration of the CEO, appointed on 1 June 2005 and of top managers hired in 2005 who did not receive the variable part of the remuneration.

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with the Board of Statutory Auditors, in accordance with article 2389, paragraph 3 of the Italian civil code; - Non cash benefits refer to all fringe benefits, including insurance policies; - Bonuses and other incentives include the variable part of the chairmans compensation and the variable part of the salary of the CEO and of the general managers of Enis divisions; - Other compensation include the salary of the previous and the current managing director and of the general managers of Enis divisions, in addition to compensations due in respect of positions on the Board of Statutory Auditors in Enis subsidiaries. Indemnities paid upon termination are also included.

| (thousand euro) — Name | Position | Term of
office | Expiry date of the
position (1) | Compensation for service
at Eni SpA | Non-cash benefits | Bonuses and other
incentives (2) | Other compensations | Total |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |

| Board
of Directors — Roberto Poli | Chairman | | 01.01-31.12 | | 30.05.08 | 831 | 8 | 40 | | | | 879 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Vittorio
Mincato | CEO | | 01.01-27.05 | | | 230 | | 1,386 | (3) | 9,649 | (4) | 11,265 |
| Paolo Scaroni | CEO | | 01.06-31.12 | (5) | 30.05.08 | 252 | 62 | | | 588 | | 902 |
| Mario
Giuseppe Cattaneo | Director | | 01.01-27.05 | | | 57 | | 10 | | | | 67 |
| Alberto Clô | Director | | 01.01-31.12 | | 30.05.08 | 123 | | 10 | | | | 133 |
| Renzo
Costi | Director | | 01.01-31.12 | | 30.05.08 | 122 | | 10 | | | | 132 |
| Dario Fruscio | Director | | 01.01-31.12 | | 30.05.08 | 117 | | 10 | | | | 127 |
| Guglielmo
Moscato | Director | | 01.01-27.05 | | | 59 | | 10 | | | | 69 |
| Mario Resca | Director | | 01.01-31.12 | | 30.05.08 | 121 | | 10 | | | | 131 |
| Marco
Pinto | Director | | 28.05-31.12 | | 30.05.08 | 68 | | | | | | 68 |
| Marco Reboa | Director | | 28.05-31.12 | | 30.05.08 | 68 | | | | | | 68 |
| Pierluigi
Scibetta | Director | | 28.05-31.12 | | 30.05.08 | 68 | | | | | | 68 |
| Board of Statutory Auditors (6) | | | | | | | | | | | | |
| Andrea
Monorchio | Chairman | | 01.01-27.05 | | | 51 | | | | | | 51 |
| Paolo Andrea Colombo | Chairman | (7) | 01.01-31.12 | | 30.05.08 | 107 | | | | 67 | | 174 |
| Luigi
Biscozzi | Auditor | | 01.01-27.05 | | | 38 | | | | 51 | | 89 |
| Filippo Duodo | Auditor | | 01.01-31.12 | | 30.05.08 | 91 | | | | 55 | | 146 |
| Edoardo
Grisolia (8) | Auditor | | 28.05-31.12 | | 30.05.08 | 48 | | | | | | 48 |
| Riccardo Perotta | Auditor | | 01.01-31.12 | | 30.05.08 | 92 | | | | 59 | | 151 |
| Giorgio
Silva | Auditor | | 28.05-31.12 | | 30.05.08 | 48 | | | | 13 | | 61 |
| General Managers | | | | | | | | | | | | |
| Stefano
Cao | Exploration & Production | | 01.01-31.12 | | | | | 397 | | 797 | | 1,194 |
| Luciano Sgubini | Gas & Power | | 01.01-31.12 | | | | | 311 | | 2,286 | (9) | 2,597 |
| Angelo
Taraborrelli | Refining & Marketing | | 01.01-31.12 | | | | | 229 | | 566 | | 795 |
| | | | | | | 2,591 | 70 | 2,423 | | 14,131 | | 19,215 |

| (1) | The term of
position ends with the Meeting approving financial
statements for the year ending 31 December 2007. |
| --- | --- |
| (2) | Based on
performance achieved in 2004. |
| (3) | Based on
performance achieved in 2004 and pro rata performance
related to the first five-month period of 2005. |
| (4) | In addition
to salary also includes indemnities paid upon termination
and further compensation determined by the Board of
Directors. |
| (5) | Appointed as
director on 28 May 2005. |
| (6) | The
Other Compensation amounts refer to
compensation obtained as chairman or as auditor of
subsidiaries. |
| (7) | Appointed as
Chairman on 28 May 2005. Previously Auditor. |
| (8) | Compensation
for the service is paid to the Ministry of Economy and
Finance. |
| (9) | In addition
to salary also includes indemnities paid upon
termination. |

Stock compensation Stock grants With the aim of improving motivation and loyalty of Eni managers through the linking of compensation to the attainment of preset individual and corporate objectives, making management participate in corporate risk and motivating them towards the creation of shareholder value and increasing at the same time their contribution to the management of the Company, starting in 2003 Eni offers its own shares purchased under its buy-back program (treasury shares) for no consideration to those managers of Eni SpA and its subsidiaries as defined in Article 2359 of the Civil Code 2

(2) Does not include listed subsidiaries, which have their own stock grant and stock option plans.

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who have achieved corporate and individual objectives. Assignments vest within 45 days after the end of the third year from the date of the offer. In application of its stock grant plan, on 31 December 2005 a total of 3,127,200 grants were outstanding for the assignment of an equal amount of treasury shares (equal to 0.08% of current capital stock) subdivided as follows: (i) a total of 1,018,400 grants (fair value euro 11.20 per share) related to 2003; (ii) a total of 912,400 grants (fair value euro 14.57 per share) related to 2004; (iii) a total of 1,196,400 grants (fair value euro 20.08 per share) related to 2005. Stock options Eni offers to managers of Eni SpA and its subsidiaries as defined in Article 2359 of the Civil Code 3 who hold positions of significant responsibility for achieving profitability or strategic targets, the opportunity to acquire a shareholding in the company as an element of remuneration through the assignment of options for the purchase of Enis treasury shares. Options provide grantees with the right to purchase Eni shares in a 1 to 1 ratio after three years from the date of the grant and upon a five-year vesting period, at a price corresponding to the higher of the arithmetic average of official prices recorded on the Mercato Telematico Azionario in the month preceding the date of the grant and the average cost of the treasury shares as of the day prior to the assignment (strike price). Strike price for the 2005 assignment was euro 22.512 per share. Grantees are able to make use of an advance from a Group finance company to purchase shares, on condition that at the same time they sign an irrevocable order for selling the shares through the mentioned company. At 31 December 2005 outstanding options were 13,379,600 carrying an average strike price of euro 17.705 per share. The weighted-average remaining contractual life of options outstanding at December 31, 2003, 2004 and 2005 is 5.6 years, 6.6 years and 7.6 years respectively. All stock options granted are considered fixed. The following is a summary of stock option activity for the years 2003, 2004 and 2005:

2003 2004 2005

(euro) Number of shares Weighted average exercise price (a) Number of shares Weighted average exercise price (a) Number of shares Weighted average exercise price (a)

| Options
as of 1 January | 3,518,500 | | 15.216 | 8,162,000 | | 14.367 | 11,789,000 | | 15.111 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| New options granted | 4,703,000 | | 13.743 | 3,993,500 | | 16.576 | 4,818,500 | | 22.512 |
| Options
exercised in the period | | | | (354,000 | ) | 14.511 | (3,106,400 | ) | 15.364 |
| Options cancelled in the period | (59,500 | ) | 15.216 | (12,500 | ) | 14.450 | (121,500 | ) | 16,530 |
| Options
outstanding as of 31 December | 8,162,000 | | 14.367 | 11,789,000 | | 15.111 | 13,379,600 | | 17.705 |
| of which exercisable at 31 December | 73,000 | | 14.802 | - | | - | 1,540,600 | | 16.104 |

(a) Below quoted market price.

The fair value of stock options granted during the years ended 31 December 2003, 2004 and 2005 of euro 1.50, euro 2.01 and euro 3.33 respectively, was calculated applying the Black-Scholes method and using the following assumptions:

2003 2004 2005

| Risk-free
interest rate | (%) | 3.16 | 3.21 | 2.51 |
| --- | --- | --- | --- | --- |
| Expected life | (year) | 8 | 8 | 8 |
| Expected
volatility | (%) | 22 | 19 | 21 |
| Expected dividends | (%) | 5.35 | 4.5 | 3.98 |

(3) Does not include listed subsidiaries, which have their own stock grant and stock option plans.

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Stock grant for Enis CEO and general managers The table below sets out stock grants assigned to Enis CEO and general managers.

Grants outstanding at beginning of the period Grants assigned during the period Grants exercised during the period Grants outstanding at end of the period

Name Number of grants Average maturity in months Number of grants Average maturity in months Number of grants Average market price at date of exercise Number of grants Average maturity in months

Vittorio Mincato (1)	CEO	104,800	19	40,200	38	145,000	19.951	-	-
Stefano Cao	General Manager of the E&P Division	40,500	20	16,000	38	12,800	23.785	43,700	21
Luciano
Sgubini	General
Manager of the G&P Division	40,500	20	16,000	38	56,500	22.784	-	-
Angelo Taraborrelli	General Manager of the R&M Division	17,500	20	16,000	38	5,400	23.785	28,100	24

(1) Retired on 27 May 2005.

Stock options for Enis CEO and general managers The table below sets out assignments of options to Enis CEO and general managers. During 2005 no options expired.

		CEO (1) Paolo Scaroni	CEO (2) Vittorio Mincato	General Manager for the E&P Division Stefano Cao	General Manager for the G&P Division Luciano Sgubini	General Manager for the R&M Division Angelo Taraborrelli
Options
outstanding at the beginning of the period:
- number of options		-	499,000	182,000	170,000	96,500
- average
exercise price	(euro)	-	15.090	15.185	15.086	15.379
- average maturity in months		-	67	79	79	81
Options
granted during the period:
- number of options		699,000	-	75,500	60,500	50,000
- average
exercise price	(euro)	22.509	-	22.509	22.509	22.509
- average maturity in months		96	-	96	96	96
Options
exercised at the end of period:
- number of options		-	499,000	56,000	230,500	23,500
- average
exercise price	(euro)	-	15.090	15.216	17.035	15.216
- average market price at date of exercise	(euro)	-	19.980	22.784	22.964	22.784
Options
outstanding at the end of the period:
- number of options		699,000	-	201,500	-	123,000
- average
exercise price	(euro)	22.509	-	17.920	-	18.308
- average maturity in months		91	-	82	-	83

| (1) | Appointed on
1 June 2005. |
| --- | --- |
| (2) | Retired on 27 May 2005. |

Share ownership At 31 December 2005 the total number of shares owned by the directors, statutory auditors and the three general managers of Eni SpA was 232,625 equal to approximately 0.006% of Enis share capital outstanding at 31 December 2005. Board committees In order to carry out its tasks more effectively, the Board of Directors has instituted three advisory Committees: the Internal Control Committee and Compensation Committee, formed exclusively by independent, non-executive Board members, except for Marco Pinto, a member of both committees, and the International Oil Committee in which also the CEO participates.

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In the meeting of 1 June, the Committees were formed as follows: Internal Control Committee : Marco Reboa (Chairman), Alberto Clô, Renzo Costi, Marco Pinto and Pierluigi Scibetta. Compensation Committee : Mario Resca (Chairman), Renzo Costi, Marco Pinto and Pierluigi Scibetta. International Oil Committee : Alberto Clô (Chairman), Dario Fruscio, Marco Reboa and Paolo Scaroni. The Code suggests the creation of a Nominating Committee in the companies with shares held widely by the public, especially when the Board notices that shareholders find it difficult to prepare proposals for appointments. This committee has not been formed in consideration of the shareholding characteristics of Eni and of the fact that Directors are appointed on the basis of candidate lists submitted by shareholders or by the Board of Directors. Internal Control Committee The Internal Control Committee, established by the Board of Directors in 1994, holds functions of supervision, counsel and proposal in the area of monitoring general management issues. In its meeting of 1 June 2005, the Board appointed Marco Reboa as chairman of this committee. In its meeting of 29 June 2005 the Board approved its new regulation (available on Enis internet site) also in order to adequate its role to the Boards resolution of 22 March 2005 that appointed the Board of Statutory Auditors to perform the functions attributed by the Sarbanes-Oxley Act and SEC rules to audit committees of US issuers, within the limits set by Italian legislation, from 1 June 2005. In the course of 2005 the Internal Control Committee convened 14 times, with an average participation of 87% of its members, and has accomplished the following: (i) reviewed the audit programs prepared by Eni SpAs and Group companies internal audit functions and their progress; (ii) reviewed and evaluated results of Eni SpAs and Group companies internal auditing procedures; (iii) monitored the actions taken and their effects aimed at eliminating the defaults shown by audit reports; (iv) examined the results of audit procedures applied to the framework agreement between Eni and Gazprom/Gazexport of 16 June 2005; (v) met with top level representatives of administrative functions in the main subsidiaries, chairmen of boards of statutory auditors and partners responsible for external audit companies to examine the essential features of 2004 financial statements with specific reference to extraordinary transactions and relations among functions entrusted with controlling functions at Eni SpA and its subsidiaries; (vi) met the partners responsible of Enis external auditors for an analysis of Enis 2005 Half Year Report; (vii) examined the conditions necessary to avail itself of the exemption from the Sarbanes-Oxley Act and the relevant regulations concerning the Audit Committee; (viii) reviewed the committees regulation; (ix) examined the report presented by the Watch Structure; (x) examined the reports prepared in accordance with audit document No. 260 concerning the communication of facts and events on auditing activities to those responsible for governance; (xi) monitored the appointment of additional functions to Enis external auditors and companies belonging to the network of the external auditors, expressing its opinion; (xii) reviewed the situation of appointments conferred in 2004 by Eni and its consolidated subsidiaries and affiliates to external auditors registered with Consob and related subjects; (xiii) reviewed the situation of appointments of external auditors of main group companies, the relevant accounts and the opinions contained in the reports of external auditors of Enis Italian subsidiaries; (xiv) examined the organizational structure of the internal audit functions with specific focus on operating audits; (xv) examined the information flows to the Internal Control Committee from the various functions of Eni and its subsidiaries as well as from external auditors. Compensation Committee The Compensation Committee, established by the Board of Directors in 1996, is entrusted with proposing tasks with respect to the Board relating to the compensation of the Chairman and CEO as well as of the Board Committees members; examining the indications of the CEO and presenting proposals on: (i) equity based incentive plans; (ii) criteria for the compensation of top managers of the Group; (iii) objectives and results evaluation of performance and incentive plans. In its meeting of 29 June 2005 the Board approved its new regulation (available on Enis internet site) and appointed Mario Resca as Chairman. In 2005, the Compensation Committee met 7 times with an average participation of 96% of its members, and accomplished the following: (i) reviewed the objectives of the 2005 Group Incentive Plan and the performance of 2004; (ii) drafted a proposal to be submitted to the Board of Directors for determining the variable part of the remuneration of the Chairman and CEO based on 2004 performance; (iii) drafted a proposal based on which the Board of Directors requested the Shareholders Meeting to authorize it to

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use treasury shares for servicing stock option and stock grant plans for 2005 (see Stock compensation above); (iv) drafted a proposal submitted to the Board of Directors concerning compensation related to the termination of employment of Enis former Managing Director Vittorio Mincato; (v) examined the compensation to be attributed to Enis new CEO Paolo Scaroni, employed by Eni with the function of General Manager, in order to draft a proposal to submit to the Board of Directors; (vi) examined the benchmarks for top management remuneration and reviewed the criteria of the remuneration policy for Group managers, as well as the stock option and stock grant plans in order to draft a proposal to submit to the Board of Directors. International Oil Committee The International Oil Committee established by the Board of Directors in 2002, is entrusted with the monitoring of trends in oil markets and the study of their aspects. In its meeting of 1 June 2005, the Board approved its new regulation (available on Enis internet site) and appointed Alberto Clô as Chairman of the Committee. In 2005 the International Oil Committee met 3 times with a 100% participation of its members. The meetings concerned: (i) a plan of activities aimed at analyzing the trends of the oil and gas industry; (ii) an in-depth analysis of China in terms of market prospects and effects on competition in the oil industry; (iii) an analysis of the structure and dynamics of oil and gas markets on which to base the energy scenarios for Enis strategic plan. Board of Statutory Auditors and other control entities Board of Statutory Auditors The Board of Statutory Auditors, in accordance with article 149 of Legislative Decree No. 58/1998, monitors: (i) the respect of laws and of Enis memorandum of association; (ii) the respect of the principles of proper administration; (iii) the adequacy of the companys organizational structure for the parts concerning administration and accounting, internal controls and administration and accounting systems as well as its reliability in presenting information properly; (iv) the adequacy of regulations imposed to subsidiaries according to article 114, paragraph 2 of the mentioned decree. The law on the protection of savings entrusted the Board of Statutory Auditors also with the monitoring of the proper implementation of corporate governance rules envisaged by the codes of conduct published by the Italian stock exchange and the associations the company belongs to and declares to respect. The Board of Directors in its meeting of 22 March 2005, in accordance with SEC Rule 10A-3 for foreign companies listed at the New York Stock Exchange, selected the Board of Statutory Auditors to fulfill the role of the audit committee in US companies under the Sarbanes-Oxley Act and other applicable laws, within the limits set by the Italian legislation from 1 June 2005. On 15 June 2005 the Board of Statutory Auditors approved the regulations for carrying out the functions attributed to the audit committee under US laws. This regulation is published on Enis internet site. The Board of Statutory Auditors comprises five auditors and two substitute auditors, appointed by the Shareholders Meeting for a three-year term. On 27 May 2005, Enis Shareholders Meeting appointed the following statutory auditors for three years and however until the Shareholders Meeting approving financial statements for fiscal year 2007: Paolo Andrea Colombo (Chairman), Filippo Duodo, Edoardo Grisolia, Riccardo Perotta and Giorgio Silva. Francesco Bilotti and Massimo Gentile are alternate auditors. A curriculum of these auditors is published on Enis internet site. The same Meeting also determined the yearly compensation for the Chairman of the Board of Statutory Auditors and each Auditor amounting to euro 115,000 and euro 80,000 respectively. Paolo Andrea Colombo, Filippo Duodo, Edoardo Grisolia and Francesco Bilotti were candidates in the list presented by the Ministry of Economy and Finance; Riccardo Perotta, Giorgio Silva and Massimo Gentile were candidates in the list presented by institutional investors coordinated by Fineco Asset Management SpA. Statutory Auditors are appointed in accordance with Enis by-laws with a list vote; at least two auditors and one substitute are chosen from minority candidates. Chairman of the Board is the first candidate of the list that received the highest number of votes. Auditors are autonomous and independent even from the shareholders who elected them. The lists of candidates include a resume of each candidate and are deposited at the companys headquarters at least 10 days before the date of the Shareholders Meeting on first call and are published on national newspapers. Article 28 of Enis by-laws, consistently with the provisions contained in the Decree of the Minister of Justice No. 162 of 30 March 2000, states that at least two auditors and one substitute auditor are chosen

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among chartered auditors and must have performed auditing activities for at least three years and that auditors not provided with these requirements must be chosen among those provided with the level of professionalism described in Decree No. 162/2000. For the purposes of said Decree, the by-laws define as related subjects commercial law, corporate economy and finance, engineering and geology. Enis auditors are all chartered auditors. Article 28 of Enis by-laws also prohibits the appointment as statutory auditor of persons that are statutory auditors or members of the supervisory board or members of the control committee of at least five companies listed in regulated markets not subsidiaries of Eni SpA. Statutory auditors receive in advance of meetings of the Board of Directors adequate and thorough information on all issues subject to Board evaluation and resolutions. Enis by-laws allow meetings held by teleconference. In 2005 the Board met 22 times with an average participation of 83% of its members. Based on information received follows information on positions held in other Boards of Directors and Boards of Statutory Auditors of listed companies by members of Enis Board of Statutory Auditors. PAOLO ANDREA COLOMBO Chairman of Partecipazioni italiane SpA; director of Mediaset SpA and SIAS SpA; Chairman of the Board of Statutory Auditors of Saipem SpA and Sirti SpA; auditor of Banca Intesa SpA, Lottomatica SpA and Ansaldo STS. FILIPPO DUODO Auditor of Benetton Group SpA. RICCARDO PEROTTA Chairman of the Board of Statutory Auditors of Snam Rete Gas SpA and Auditor of Mediaset SpA and Gewiss SpA. External Auditors As provided for by Italian laws, external auditors must be a chartered company and are appointed by the Shareholders Meeting. Enis external auditors, PricewaterhouseCoopers SpA, were appointed by the Shareholders Meeting of 28 May 2004 for a three-year term ending with the Meeting approving financial statements for 2006. Financial statements of Eni subsidiaries are audited, mainly by PricewaterhouseCoopers. In order to express its opinion on Enis consolidated financial statements PricewaterhouseCoopers took the responsibility of the revision of audits performed by other auditors that however represent a negligible part of Enis consolidated assets and revenues. Enis external auditors and the companies belonging to their network are not to be appointed to other functions not related to auditing, except in exceptional cases for tasks not prohibited by Consob and the Sarbanes-Oxley Act as approved by the Boards of Directors of Eni Group companies, subject to authorization of the respective Boards of Statutory Auditors. Enis Board of Statutory Auditors must be informed of the auditing tasks entrusted to external auditors. Other auditing The accounts of the parent company Eni SpA are subject also to the review of the Italian Court of Accounts, in the person of the Magistrate delegated to control, Luigi Schiavello (alternate Angelo Antonio Parente). Significant differences in corporate governance practices as per Section 303A.11 of the New York Stock Exchange Listed Company Manual Corporate governance standards followed by Italian listed companies are set forth in the Civil Code and in the Legislative Decree No. 58 of 24 February 1998, Single text containing the provisions concerning financial intermediation (Testo unico delle disposizioni in materia di intermediazione finanziaria, the TUF), as well as by the Self-discipline Code of listed companies (the Code) issued by the Committee for corporate governance of listed companies. As discussed below, Italian corporate governance standards differ for certain aspects from NYSE standards. The civil code and the TUF assign specific binding and irrevocable powers and responsibilities to companys corporate bodies. The Code, based on this regulatory framework, provides recommendations on corporate governance intended to reflect generally accepted best practices. Although these recommendations are not binding, Borsa Italiana SpA requests listed companies to publish an Annual Report on corporate governance which contains, besides a general description of the corporate governance system adopted, also any recommendation that was not followed and the reasons for this choice. Eni adopted the self-discipline code. Enis organizational structure follows the traditional Italian model of companies which provides for two main separate corporate bodies, the Board of Directors and the Board of Statutory Auditors to whom are respectively entrusted management and monitoring duties. This model differs from the US unitary model which provides for the Board of Directors as the sole

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corporate body responsible for management and, through an audit committee established within the same Board, for monitoring. Below is a description of the most significant differences between corporate governance practices followed by US domestic companies under the NYSE standards and those followed by Eni. INDEPENDENT DIRECTORS NYSE Standards Under NYSE standards listed US companies Boards must have a majority of independent directors. A director qualifies as independent when the Board affirmatively determines that such director has no certain material relationship (commercial, industrial, banking, consultancy, etc.) with the listed company (and its subsidiaries), either directly, or indirectly. In particular, a director is not deemed independent if he/she or an immediate family member has a certain specific relationship with the issuer, its auditors or companies that have material business relationships with the issuer (e.g. he/she is an employee of the issuer or a partner/employee of the auditor). In addition, a director cannot be considered independent in the three-year cooling-off period following the termination of any relationship that compromised a directors independence. Eni Standards In Italy, the Code recommends that the Board of Directors includes an adequate number of independent non-executive directors in the sense that they: a) do not entertain, directly or indirectly or on behalf of third parties, nor have recently entertained business relationships with the company, its subsidiaries, the executive directors or the shareholder or group of shareholders who controls the company of a significance able to influence their autonomous judgement; b) neither own, directly or indirectly or on behalf of third parties, a quantity of shares enabling them to control the company or exercise a considerable influence over it nor participate in shareholders agreements to control the company; and c) are not immediate family members of executive directors of the company or of persons in the situations referred to in points a) and b). The independence of directors is periodically reviewed by the Board of Directors keeping into account the information provided by the directors themselves. The Code also recommends that to evaluate independence in the case of earlier business dealings, reference should be made to the previous financial year and for work relationships and functions of executive director, to the three preceding financial years. The Code provides for a qualitative evaluation, that considers the whole of the relationships held, in order to check as the case may be if the existing relationships between the issuer and the director are such to impair the directors independence. In 2005, Enis Board of Directors judged that the Chairman and its non-executive members comply with the independence standards, as provided for by the Code. Director Marco Pinto is an employee of the Ministry of Economy and Finance. MEETINGS OF NON EXECUTIVE DIRECTORS NYSE Standards Non-executive directors, including those who are not independent, must meet at regularly scheduled executive sessions without management. Besides, if the group of non-executive directors includes directors who are not independent, independent directors should meet separately at least once a year. Eni Standards Neither Enis non-executive directors nor Enis independent directors must meet separately, under the Codes corporate governance rules. AUDIT COMMITTEE NYSE Standards Listed US companies must have an audit committee that satisfies the requirements of Rule 10A-3 under the Securities Exchange Act of 1934 and that complies with the further provisions of the Sarbanes-Oxley Act and of Section 303A.07 of the NYSE Listed Company Manual. Eni Standards In its meeting of 22 March 2005, Enis Board of Directors, making use of the exemption provided by Rule 10A-3 for non-US private issuers, has identified the Board of Statutory Auditors as the body that, starting from 1 June 2005, is performing the functions required by the SEC rules and the Sarbanes-Oxley Act to be performed by the audit committees of non-US companies listed on the NYSE (see paragraph Board of Statutory Auditors earlier). Under Section 303A.07 of the NYSE listed Company Manual audit committees of US companies have further functions and responsibilities which are not mandatory for non-US private issuers and which therefore are not included in the list of functions shown in the paragraph referenced above. NOMINATING/CORPORATE GOVERNANCE COMMITTEE NYSE standards US listed companies must have a nominating/corporate governance committee (or equivalent body) composed entirely of independent directors that are entrusted, among others, with the responsibility to identify individuals qualified to become board members and to select or recommend director nominees for submission to the shareholders meeting, as well as to develop and recommend to the Board of Directors a set of corporate governance guidelines. Eni Standards This provision is not applicable to non-US

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private issuers. The Code allows listed companies to have within the Board of Directors a committee for directors nominees proposals, above all when the Board of Directors detects difficulties in the shareholders submission of nominees proposals, as could happen in publicly-owned companies. Eni has not set up a nominating committee, considering the nature of its shareholding as well as the circumstance that, under Eni by-laws, directors are appointed by the Shareholders Meeting based on lists presented by shareholders or by the Board of Directors. Shareholders Meetings The Shareholders Meeting is the institutional meeting point of shareholders and the management of the company. During meetings shareholders can request information on issues in the agenda and on the general management of the company. Information is provided within the limits of confidentiality of price sensitive information. The ordinary Shareholders Meeting performs the functions described in article 2364 of the Civil Code and the extraordinary Shareholders Meeting the ones described in article 2365, besides the others provided for by other laws. With the aim of facilitating the attendance of shareholders, calls for meetings are published on Italian and foreign newspapers, Enis by-laws allow vote by correspondence and the collection of powers of attorney in articles 13 and 14. On 4 December 1998 Eni approved a regulation for its meetings, available on Enis internet site, in order to guarantee an efficient deployment of meetings, in particular the right of each shareholder to express his opinion on the items in the agenda. Enis shareholders Eni SpAs share capital at 31 December 2005 amounted to euro 4,005,358,876, fully paid and was represented by 4,005,358,876 ordinary shares of nominal value euro 1 each. Shares are not divisible and give right to one vote. Shareholders can exercise the rights provided by the law. Based on information available and received in accordance with Consob Decision No. 11971/1999, as of 31 December 2005, shareholders holding more than 2% of Enis share capital were:

Shareholders		Shares held	% of capital
Ministry of Economy and
Finance		813,443,277	20.31
Cassa Depositi e Prestiti SpA		400,288,338	9.99
Eni SpA (own shares)		278,013,975	6.94
Shareholders by area
Shareholders	Number of shareholders	Number of shares (1)	% of capital
Italy	261,174	2,543,555,459	63.52
UK and Ireland	963	93,619,599	2.34
Other EU	3,977	495,123,921	12.36
USA and Canada	1,552	192,803,507	4.81
Rest of world	1,783	304,605,396	7.61
Own shares at the dividend date		244,488,113	6.11
Other	n.a.	130,263,881	3.25
Total	269,449	4,004,459,876	100.00

(1) At the dividend payment date, 23 June 2005 (ex-dividend date was 20 June 2005).

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| Shareholders by amount of
shares held — Shareholders | Number of shareholders | Number of shares (1) | % of capital |
| --- | --- | --- | --- |
| >10% | 1 | 813,443,277 | 20.31 |
| 3%-10% (2) | 3 | 680,861,792 | 17.00 |
| 2%-3% | | | |
| 1%-2% | 7 | 406,360,994 | 10.15 |
| 0.5%-1% | 9 | 271,287,295 | 6.77 |
| 0.3%-0.5% | 14 | 208,487,474 | 5.21 |
| 0.1%-0.3% | 44 | 300,548,130 | 7.51 |
| < 0.1% | 269,371 | 948,718,920 | 23.69 |
| Own shares at the dividend
date | | 244,488,113 | 6.11 |
| Other | n.a. | 130,263,881 | 3.25 |
| Total | 269,449 | 4,004,459,876 | 100.00 |

| (1) | At the dividend payment
date, 23 June 2005 (ex-dividend date was 20 June 2005). |
| --- | --- |
| (2) | Shareholders Banca
dIntermediazione Mobiliare Imi and Banca Primavera
informed that they reduced their interests below the 2%
threshold (from 3.60 to 1.50% and from 3.41 to 0.48%,
respectively). |

Special powers of the State - golden share Under article 6.1 of Enis by-laws only the Italian State can hold shares representing more than 3% of Enis share capital. When this limit is exceeded, exceeding shares do not entail voting rights. Enis by-laws in article 6.1, modified by the Board of Directors in its meeting of 15 April 2005, attribute to the Minister for Economy and Finance, in agreement with the Minister of Productive Activities, the following special powers to be used in compliance with the criteria indicated in the Decree of the President of the Council of Ministers of 10 June 2004: (a) opposition to the acquisition of material interests representing 3% of the share capital of Eni SpA having the right to vote at ordinary Shareholders Meetings. This must be communicated, if the transaction is considered of prejudice to vital interests of the State, at least ten days after the communication that Enis directors are expected to make to the Minister when the new shareholder is entered in the record; (b) opposition to shareholders agreements or other arrangements (as defined by article 122 of Legislative Decree No. 58 of 24 February 1998) involving 3% or more of the share capital of Eni SpA having the right to vote at ordinary Shareholders Meetings; (c) veto power duly motivated by the case of prejudice to the interests of the State with respect to shareholders resolutions to dissolve Eni SpA, to cause a transfer, merger or demerger, to transfer the registered office of Eni SpA outside Italy, to change the corporate purposes or to amend or modify any of the special powers described in this section; (d) appointment of a Board member without voting right. Law No. 266 of 23 December 2005 (Budget Law) in article 1 paragraphs from 381 to 384 in order to favor the process of privatization and the diffusion of investments in companies held also by the State, introduced the option to include in the by-laws of companies formerly owned by the State, as Eni SpA, regulations against takeovers, which in particular provide for the issue of shares and financial instruments also at nominal value with the right to vote at ordinary and extraordinary Shareholders Meetings in favor of one or more shareholders identified also in terms of the number of shares held. The introduction of these norms, also subject to approval by the EU, will cause the cancellation of the above mentioned special powers of the State contained in article 6.2 of Enis By-laws. Law on the protection of savings As concerns corporate governance aspects, the law on the protection of savings in force from 12 January 2006 among other things: - sets new independence and honorability requirements for directors of listed companies; - introduces the list vote for the election of directors as a protection of minority shareholders and delegates to Consob the power to regulate the appointment of a statutory auditor by minority shareholders. The law states that shareholders representing at least 2.5% of share capital can present a list. Enis by-laws establish the list vote for directors and statutory auditors and set this threshold at 1% of share capital; - delegates to Consob the determination of the limits to the number of memberships of Boards of Directors and Boards of Statutory Auditors that directors and

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auditors of listed companies can hold in other listed companies; - states that the chairman of the Board of Statutory Auditors must be elected among the candidates of the minority list. Enis by-laws will be amended to implement this new rule; - introduces the function of a Manager responsible for the preparation of financial reporting documents subject to authorization of the Board of Statutory Auditors to be appointed in accordance with the companys by-laws, that must be amended within twelve months from the entry into force of the law. Internal controls Eni is aware that financial information plays a crucial role in the functioning of capital markets and in the creation and maintenance of satisfying relationships between the company and its increasingly wide area of stakeholders. Eni is also aware that investors trust in listed companies is one of the essential elements for the functioning of global economy. Investors must be able to rely on the absolute moral integrity of the persons responsible of key positions in companies and on their respect of corporate codes of conduct, procedures and rules. Enis Code of Conduct identifies the fundamental values for the deployment of its activities in the completeness and transparency of information, the formal and substantial legitimacy of behavior of its employees at any organizational level and the clarity and truthfulness of its accounting, in accordance with laws and regulations in force. As concerns internal controls, Enis policy consists in disseminating at all levels a culture characterized by the awareness of the existence of controls and a control oriented mentality. Employees must have a positive attitude towards controls since the latter provide a positive contribution to the improvement of efficiency. The responsibility for establishing an efficient system of internal controls is shared by all levels of the organization, therefore all Eni employees in the functions they perform are responsible for the definition and proper functioning of controls. Within their competence, all managers must be part of corporate control systems and are expected to inform their employees. The Code of Conduct also states that accounting transparency is based on the truthfulness, accuracy and completeness of the information contained in official records that must reflect the supporting materials, easily traceable and ordered according to logical methods, that favor the identification reconstruction of transactions. The internal audit function and external auditors have free access to data, documents and information required for the performance of audit tasks. Enis internal control system on financial information has been designed with the aim of providing investors and markets with truthful, complete and timely information. The Board of Directors determines the guidelines for the internal audit process and verifies the adequacy and functioning of the management of major corporate risks. In performing these tasks, the Board of Directors is assisted by the Internal Control Committee; in particular the regulation of the Internal Control Committee states that the Committee assists the Board in the performance of the tasks related to: (i) defining the guidelines for the companys internal control systems; (ii) periodically checking their effectiveness and proper working; (iii) controlling that the main risks are recognized and managed properly. As concerns the administrative and accounting procedures for the preparation of statutory and consolidated financial statements and any other form of financial reporting that is to be prepared by the Manager in charge of the preparation of financial reporting documents according to art. 154 bis of Legislative Decree 58/1998 included in the law on the protection of savings, Eni already approved regulations for the preparation of financial statements of Group companies and the collection of information necessary for quarterly and yearly reports in accordance with generally accepted accounting standards, ensuring also uniformity of behavior, an essential element for the provision of proper information on the Group. These procedures concern in particular: (i) the Groups general accounting plan, which includes also statutory and reclassified tables 4 (profit and loss account, balance sheet, statements of cash flows) and tables connecting each account to a single line item in the aforementioned tables; (ii) Group norms for the preparation of annually and quarterly consolidated financial statements which define: (a) principles of consolidation; (b) scope of consolidation; (c) criteria for recognition of assets, liabilities, revenues and

(4) Summarized tables are used in the directors operating and financial reviews.

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expenses; (d) statements of profit and loss account, balance sheet and cash flow; (e) principles for the preparation of the directors report and notes to the financial statements; (f) principles for the preparation of financial statements on Form 20-F 5 ; (g) principles for the preparation of quarterly reports. Group norms are published in a section of Enis intranet site called Lince, which contains all these norms and guidelines on administrative, financial, fiscal, and corporate matters and is accessible to most Eni employees. Quarterly reports and consolidated financial statements are prepared by means of the unified integrated reporting system MASTRO (Management and Statutory Reporting Object) which represents the information platform for Eni companies included in consolidation. The system is provided with safety measures and automatic controls that ensure consistency of information input by individual companies and at Group level. From 2003 Eni implemented a comprehensive project for monitoring and updating its control on financial reporting in order to check its compliance with the norms of Section 404 of the Sarbanes-Oxley Act applicable to Eni as foreign private issuer in force from 2006. This deadline has been considered as an opportunity for improving the existing system and within this process Eni published a regulation on disclosures controls and procedures. A relevant role in Enis internal control system is played by the Internal Audit function, directly reporting to the CEO 6 . Among the tasks entrusted to the internal audit function are: (i) updating the risk assessment system in order to plan auditing, control and monitoring activities as defined by the Model for organization, management and control according to Legislative Decree No. 231/2001; (ii) implementing the auditing and monitoring plan and performing any required activities not included in the plan; (iii) keeping proper relations and information flows with the Internal Control Committee and the Board of Statutory Auditors; (iv) performing the necessary activities for the appointment of external auditors, (v) keeping relations with external auditors. The Internal Control Committee and the Board of Statutory Auditors evaluate the auditing plan and the results of auditing activities. The watch structure created under Legislative Decree No. 231/2001 approves the auditing plan and evaluates the results of auditing activities. Legislative Decree No. 231/2001 In the meetings of 15 December 2003 and 28 January 2004 the Board of Directors approved a Model for organization, management and control according to Legislative Decree No. 231/2001 which defines and regulates the administrative responsibility of persons, companies and partnerships, according to article 11 of Law No. 300 of 29 September 2000 and established a watch structure. The principles of the 231 model are published on Enis internet site. The criteria for the preparation of this model are those included in a guidebook prepared by Confindustria. The model was transmitted to all Group companies for application. Investor relations and information processing In concert with the launch of its privatization process, Eni adopted a communication policy, confirmed by the Code of Conduct, aimed at promoting an ongoing dialogue with institutional investors, shareholders and the markets to ensure systematic dissemination of exhaustive complete, transparent, selective and prompt information on its activities, with the sole limitation imposed by the confidential nature of certain information. Information made available to investors, markets and the press is provided in the form of press releases, regular meetings with institutional investors and the financial community and the press, in addition to general documentation released and constantly updated on Enis internet site. Investor and shareholder relations are handled by special Eni functions. Relations with investors and financial analysts are held by the Investor Relations office. Information is available on Enis web site and can be requested to the [email protected] mailbox.

| (5) | Eni shares in the form of
ADRs are listed at the New York Stock Exchange, that
requires Eni to file Form 20-F with the SEC. In this form
the company has to prepare financial statements in
accordance with accounting principles generally accepted
in the United States. For facilitating comparisons Eni
also includes this information in the notes to its
consolidated financial statements. |
| --- | --- |
| (6) | Until 30 June 2005, this
function reported directly to the Chairman. The Chairman
and the CEO jointly supervise this activity and make
decisions related to the appointment of the manager
responsible for this function and his direct
collaborators. |

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Relations with the press are held by the Relations with the press unit. Relations with shareholders are held by the Corporate Secretary office. Information is available on Enis web site and can be requested to the [email protected] mailbox and the toll-free number 800940924 (Outside Italy 80011223456). Information regarding periodic reports and major events/transactions is promptly released to the public, also through the internet site. A specific section of Enis site contains all press releases, procedures concerning corporate governance, presentations provided in meetings with the press and financial analysts, notices to shareholders and bond holders and information concerning shareholders and bond holders meetings, including proceeds thereof. Documents available to the public free of charge are mailed on request. On 28 February 2006, Enis Board of Directors updated the Procedure for the disclosure of information to the market concerning Group activities approved on 18 December 2002 and published on Enis internet site. The procedure acknowledges Consob guidelines and the Guidelines for information to the market issued in June 2002 by the Ref Forum on company information and those included in the laws implementing the European directive on market abuse, defines the requirements for disclosure to the public of price sensitive events (materiality, clarity, homogeneity, information symmetry, consistency and timeliness) and the information flows for acquiring data from Group companies and providing adequate and timely information to the Board and the market on price sensitive events. It also contains sanctions applied in case of violation of its rules in accordance with the crimes identified and sanctioned by the new law on the protection of savings. Enis Code of Conduct defines confidentiality duties upheld by Group employees relating to the treatment of sensitive information. Internal dealing On 28 February 2006 the Board of Directors approved a procedure concerning the creation and updating a register of persons with a right to access privileged information at Eni, as provided for by art. 115 of Legislative Decree No. 58 of 24 February 1998 which states that listed issuing companies and the subjects who have a control relation with them, or acting in their name, must establish and regularly update a register of the persons that, due to their professional activity or functions performed have access to information as described in article 114 (privileged information). The procedure implementing Consob Decision No. 11971/1999, as amended, defines: (i) terms and procedures for the recording and possible cancellation of the persons that, due to their professional activity or functions performed on behalf of Eni, have access to privileged information; (ii) terms and procedures of information of said persons of their recording or cancellation and relevant reasons. The procedure is in force from 1 April 2006. In the same meeting the Board approved the Internal dealing procedure for the identification of relevant persons and the communication of transactions involving financial instruments issued by Eni SpA and its listed subsidiaries, which substitutes the Internal Dealing Code approved by the Board on 18 December 2002. The procedure implements the provisions of article 114, paragraph 7 of Legislative Decree No. 58 of 24 February 1998 which states that subjects performing administration, control or management activities for a listed issuer and managers having regular access to privileged information as per paragraph 1 and having the power to make operating decisions that can affect the development and future situation of the issuer and whoever holds shares corresponding to at least 10% of the companys share capital and any other person controlling the issuer are obliged to inform Consob and the market of any transaction involving financial instruments issued by the issuer, also when performed by others on their behalf. This communication is due also by spouses not legally separated, children, parents, relatives living with the subject and in the other cases indicated by Consob in implementation of Directive 2004/72/CE of the European Commission. Enis procedure: (i) identifies relevant persons: (ii) defines the transactions involving financial instruments issued by Eni SpA; (iii) determines the terms and conditions for the disclosure to the public of such information; (iv) reports the sanctions introduced by the law for the case of non compliance. The procedure in force from 1 April 2006 is published on Enis internet site. Transactions with related parties In the ordinary course of its business, Eni enters into transactions concerning the exchange of goods, provision of services and financing with related parties as defined by IAS 24. These include non consolidated

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subsidiaries and affiliates as well other companies owned or controlled by the Italian Government. All such transactions are conducted on an arms length basis and in the interest of Eni companies. Directors, general managers, managers with strategic responsibilities disclose every six months any transactions with Eni SpA and its subsidiaries that require disclosure under IAS 24. Amounts and types of trade and financial transactions with related parties are described in Note 32 to the consolidated Financial Statements. Follow the tables included in the Handbook for the preparation of the report on corporate governance issued by Assonime and Emittente Titoli SpA in March 2004.

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| Structure of
the Board of Directors and its Committees — Board of Directors | Internal Control Committee | Compensation Committee | International Oil Committee |
| --- | --- | --- | --- |

Members executive non executive independent % attendance (1) other appointments (2) members % attendance (1) members % attendance (1) members % attendance (1)

| Chairman — Roberto
Poli | | X | X | 100 | 6 | | | X (3) | 100 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| CEO | | | | | | | | | | |
| Paolo
Scaroni | 01.06-31.12 | X | | 100 | 5 | | | | X | 100 |
| Vittorio Mincato | 01.01-27.05 | X | | 100 | | | | | X | 100 |
| Directors | | | | | | | | | | |
| Alberto Clô () | | X | X | 86 | 4 | X | 79 | | X | 100 |
| Renzo
Costi () | | X | X | 71 | | X | 71 | X (4) | 83 | |
| Dario Fruscio | | X | X | 71 | | | | | X | 100 |
| Marco
Pinto | 28.05-31.12 | X | | 100 | | X | 86 | X | 100 | |
| Marco Reboa () | 28.05-31.12 | X | X | 92 | 7 | X | 100 | | X | 100 |
| Mario
Resca | | X | X | 81 | 3 | | | X | 100 | |
| Pierluigi Scibetta | 28.05-31.12 | X | X | 100 | 1 | X | 100 | X | 100 | |
| Mario
Giuseppe Cattaneo () | 01.01-27.05 | X | X | 88 | | X | 100 | | | |
| Guglielmo Moscato | 01.01-27.05 | X | X | 88 | | X | 100 | | X | 100 |

Number of meetings in 2005	21	14	7	3
01.01-27.05	8	7	2	2
28.05-31.12	13	7	5	1

| (*) | Designated by
the minority list. |
| --- | --- |
| (1) | For the
directors appointed by the Shareholders Meeting of
27 May 2005, the percentage was determined based on the
numbers of meetings held during membership. |
| (2) | Appointments
as director or statutory auditor in other listed
companies, also outside Italy. |
| (3) | From 1
January to 27 May. |
| (4) | From 1
January to 27 May and from 14 June to 31 December. |

The Code suggests the creation of a Nomination Committee in the companies with shares held widely by the public, especially when the Board notices that shareholders find it difficult to prepare proposals for appointments. This committee has not been formed in consideration of the shareholding characteristics of Eni and of the fact that Directors are appointed on the basis of candidate lists submitted by shareholders or by the Board of Directors.

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Board of Statutory Auditors

Members % attendance (1) Meetings of the Board of Directors % attendance (1) Meetings of the Board of Statutory Auditors Number of other appointments (2)

| Chairman — Paolo
Andrea Colombo (3) | | 90.4 | 91 | 8 |
| --- | --- | --- | --- | --- |
| Andrea Monorchio | 01.01-27.05 | 87.5 | 78 | |
| Auditors | | | | |
| Filippo Duodo | | 90.4 | 82 | 1 |
| Edoardo
Grisolia | 28.05-31.12 | 69.2 | 69 | |
| Riccardo Perotta () | | 85.7 | 91 | 3 |
| Giorgio
Silva () | 28.05-31.12 | 100.0 | 77 | |
| Luigi Biscozzi (*) | 01.01-27.05 | 87.5 | 78 | |
| Number of
meetings in 2005 | | 21 | 22 | |
| 01.01-27.05 | | 8 | 9 | |
| 28.05-31.12 | | 13 | 13 | |

| (*) | Designated by
the minority list. |
| --- | --- |
| (1) | For the
auditors appointed by the Shareholders Meeting of
27 May 2005, the percentage was determined based on the
numbers of meetings held during membership. |
| (2) | Appointments
as director or statutory auditor in other listed
companies. |
| (3) | Chairman from
28 May 2005, formerly statutory auditor. |

For presenting a list, the shareholder or group of shareholders must hold at least 1% of voting shares in an ordinary shareholders meeting.

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Other information to be disclosed under the Self-discipline Code

	Yes
System of delegated powers and transactions
with related parties
The Board of Directors
delegated powers defining:
a) limitations	X
b) exercise	X
c) periodicity of information	X
The Board of Directors
reserved examination and approval of relevant
transactions (including transactions with related
parties)	X
The Board of Directors defined guidelines for
identifying relevant transactions	X
Such guidelines are described
in the report	X
The Board of Directors defined procedures for
examination and approval of transactions with related
parties	X (*)
Such procedures are described
in the report	X (*)
Procedures for the latest appointment of
Directors and Statutory Auditors
Lists of candidate directors
were deposited at least 10 before the date set for
appointment	X
Lists were accompanied by sufficient information
on candidates	X
Candidates to the role of
director disclosed information that qualified them as
independent	X
Lists of candidate auditors were deposited at
least 10 before the date set for appointment	X
Lists were accompanied by
sufficient information on candidates	X
Meetings
The company approved
regulations of meetings	X
The regulations are attached to the report
(indication of where to find it online is provided)	X
Internal Control
The company appointed persons
responsible for internal control	X
Such persons do not report to managers of
operating divisions	X

Internal office responsible of internal control (art. 9.3 of the code) Internal Audit

Investor relations
The company appointed an
investor relations manager	X

Information on investor relations manager (telephone, address, e-mail) and unit Investor Relations (**)

| () | Procedures
will be prepared after the publication by Consob of the
general principles as per art. 2391 bis of the Civil Code
introduced by Legislative Decree No. 310 of 28 December
2004. |
| --- | --- |
| (*) | Eni SpA -
Piazza Vanoni, 1 - San Donato Milanese (Milan) 20097
Italy - Tel. 02 52051651 - Fax 02 52031929. |

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Commitment to sustainable development INTRODUCTION

Eni is aware that the creation of value in the medium-long term requires an effective management of relations with stakeholders. Since 2001 Eni has been supporting the Global Compact initiative of the United Nations, aimed at promoting corporate policies and practices oriented to sustainability by sharing and implementing ten basic principles concerning human rights, labor standards, environmental protection and the fight against corruption. In 2005 Eni continued to promote corporate practices in line with these principles. With respect to transparency, Eni supported the introduction of the tenth principle and upheld the Extractive Industries Transparency Initiative (EITI) that unites governments, international financial institutions, energy companies and Non Governmental Organizations (NGO) with the aim of making revenue flows from extractive industries transparent.

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HUMAN RESOURCES AND ORGANIZATION

Foreword The centrality of persons, their safeguard and enhancement are a crucial value in Enis culture and one of the key factors for the creation of sustainable value in the long term. Enis main objectives for its human resources are the following: (i) to guarantee safety and health of employees and contractors; (ii) to plan human resources management and development initiatives oriented to the medium and long term consistent with the features of the industry but adequate to the promotion of individual career paths; (iii) to attract the best resources at domestic and international level through intense relations with universities and research centers, actively contributing to the education and training of young generations; (iv) to develop and share know-how through the systematization and dissemination of knowledge and best practices for operating processes; (v) to manage international human resources with homogeneous tools in the respect of local laws and cultures; (vi) to obtain significant results in the field of industrial relations both locally and internationally; (vii) to attain the greatest effectiveness from internal communication and training activities. Workforce At 31 December 2005, Enis employees were 72,258 with an increase of 1,910 employees from 31 December 2004, or 2.7%, reflecting a 2,479 increase in employees hired and working outside Italy and a 569 decline in employees hired in Italy. Employees hired in Italy were 40,192 (55.6% of all Group employees), of these 37,493 were working in Italy, 2,480 outside Italy and 219 on board of vessels. As compared to 2004, the 569 unit decline in employees was due mainly to changes in consolidation (723 employees, due to the divestment of the water business, IP and technical services at Porto Marghera) offset in part by

Employees at year-end (units) 2003 2004 2005 Change % Ch.

| Exploration
& Production | 7,492 | 7,477 | 7,491 | 14 | | 0.2 | |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Gas & Power | 12,982 | 12,843 | 12,324 | (519 | ) | (4.0 | ) |
| Refining
& Marketing | 13,277 | 9,224 | 8,894 | (330 | ) | (3.6 | ) |
| Petrochemicals | 7,050 | 6,565 | 6,462 | (103 | ) | (1.6 | ) |
| Oilfield
Services Construction and Engineering | 25,583 | 25,819 | 28,684 | 2,865 | | 11.1 | |
| Other activities | 6,380 | 4,983 | 4,638 | (345 | ) | (6.9 | ) |
| Corporate
and financial companies | 2,657 | 3,437 | 3,765 | 328 | | 9.5 | |
| | 75,421 | 70,348 | 72,258 | 1,910 | | 2.7 | |

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the positive balance of persons leaving their job and new hirings and net transfers from unconsolidated subsidiaries. The process of improvement in the quality mix of employees continued in 2005 with the hiring of 2,099 persons, of which 727 with open-end contracts. A total of 1,372 persons were hired with this type of contract and with apprenticeship contracts, most of them with university qualifications (800 persons of which 509 are engineers) and 533 persons with a high school diploma. During the year 2,027 persons left their job at Eni, of these 1,438 had an open-end contract and 589 a fixed-term contract. Employees hired and working outside Italy at 31 December 2005 were 32,066 (44.4% of all Group employees), with a 2,479 persons increase due to the positive balance of new hirings with open-end contracts and persons leaving their job in Saipem and Snamprogetti (2,639 employees) and the negative balance (160 persons) of persons leaving the job and new hirings with open-end contracts in the rest of the Group. Organization Studies have been started for the restructuring of the orientation and control functions of the corporate department, now responsible for orienting and coordinating service subsidiaries. Following the merger of EniData SpA and Italgas Più SpA into Eni, all operating activities have been integrated. Human resources management and development The major initiatives of 2005 in the area of human resources management and development were: (i) introduction of change management plans in order to support the improvement of internal control systems; (ii) implementation of a plan for the rejuvenation of managers at all levels; (iii) introduction of an innovative operating tool for the support of incentive policies for junior managers aimed at enhancing professionalism and guaranteeing internal fairness and competitivity with reference markets; (iv) introduction of apprenticeship contracts in all operating units of the Group aimed at training and developing industry-typical skills through training on the job and skilled qualification supplied by internal experts and technicians; (v) enhancement of the tools for the evaluation of the development potential of resources, coupling the appraisals made at (hierarchical and functional) line level with those performed by external experts. These activities were addressed to key managers, developing young managers and newly recruited graduates. The appraisal reports collected have been included in the management reviews at division and company level and allowed to implement consistent mobility, development and training programs; (vi) at international level an in-depth analysis has been started of pension schemes existing in other countries, as a basis for an eventual standardization in the light of local and industry-wide situations; (vii) updating of the procedures for the management of internationally assigned employees consistent with the best practices applied worldwide; (viii) continuation of training initiatives directed to high potential international resources. Equal opportunities and management of diversity In compliance with national laws and following the recommendations of the European Union for the protection of the dignity of persons, Eni is committed to promote actions aimed at the identification and related elimination of obstacles to equal opportunities in access to jobs and careers. Within its policy for equality of opportunities, Eni applies all the laws and regulations that protect

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handicapped persons and other socially disadvantaged groups and promotes actions for favoring their entry into the company. With over 45% of its employees of non Italian nationality, Eni has always considered diversity as an element that generates value and the ability in managing it as a key factor for success. In the countries where it operates Eni promotes the development of skills of local human resources and the construction of a shared culture by means of training initiatives oriented to the understanding of intercultural diversity, intercultural communication and multicultural teamwork, initiatives that have been performed also within the European Works Council with the active participation of workers unions. Health Activities for the protection of health aim at improving general work conditions and are developed according to three main principles: (i) protection of employees health; (ii) prevention of accidents and professional diseases; (iii) promotion of healthier behaviors and life styles in workplaces. In 2005 over approximately euro40 million have been invested in the protection of health. In Italy, health surveillance is performed in each operating unit through a network of health centers and by means of medical examinations, controls and monitoring campaigns for the major physical, chemical and biological risk agents. The health of employees outside Italy is protected likewise, in many cases integrating the typical activities of medicine on the workplace and first aid with the activities dedicated to primary health care extended also to family members and in many cases also to local communities. Eni has a network of 339 own health care centers located in its main operating areas of these 241 centers are outside Italy and are managed by local staff (322 doctors and 384 nurses). A set of international agreements with the best local and international health centers guarantees efficient service and timely reactions to emergencies. In 2005 Eni boosted its E-medicine program aimed at increasing the quality of health care provided to employees and to health operators in Italy and outside Italy, that integrates computerized technologies and advanced telecommunication systems. The program includes three projects: (i) health card, on line access to health data of employees by means of an electronic card provided first to groups of employees outside Italy, that will be progressively extended to all employees; (ii) telemedicine, a project oriented mainly to health care outside Italy, but open also to Italian industrial sites, based on contacts with highly qualified health centers worldwide and capable of providing real time consultation. This project is operating in Congo and Nigeria and in 2005 has been extended to four sites in Libya. (iii) e-learning, this project provides access to continuous training programs in the field of health to Enis health operators in Italy and outside Italy by means of remote learning devices. For its employees Eni started a program of prevention, both through information campaigns and by means of screening procedures and direct actions accessed on a voluntary basis. The areas concerned are: (i) prevention of cancer; (ii) prevention of cardiovascular diseases; (iii) prevention of certain infective diseases. In the first area, following the guidelines of the Italian national health plan and based on agreements with the Italian League against cancer and with a number of hospitals, Eni started an early diagnosis plan for employees in all its Italian sites. At 31 December 2005 a total of 46 sites were taking part in the program with about 4,000 employees subjected to tests for cancer prevention, for a total of about 9,000 interventions. Eni continued its campaign for the prevention of strokes in cooperation with the Additional Health Fund of Eni employees to which about 7,000 employees participated. A program for the identification of heart failure risk has been launched with the cooperation of the medical fund managed by workers unions. In the area of prevention of infective diseases, Eni continued its campaign for vaccination against flu that is widely followed by employees. Outside Italy Eni promoted specific information campaigns for the protection of its employees, their families and local communities, such as those for the prevention of malaria (in Nigeria and Azerbaijan) and the prevention of HIV transmission (in Nigeria and Congo). In 2004 Saipem issued a corporate HIV-AIDS Policy that aims at implementing a Program for the prevention of sexually transmitted diseases and HIV-AIDS. Among the guidelines of this program, such as health measures for preventing risk situations, we wish to stress the following principles:

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no discrimination of HIV positive employees both on the work place and in social situations; - respect for the privacy of all persons involved, according to laws in force and deontological ethics. For employees hired in Italy and working outside Italy, Eni has a specific program that includes: - an initial medical examination; - vaccinations and administration of prophylactic drugs as suggested by international health organizations and indicated for each individual situation; - detailed information on life and work conditions in the host country, including specific environmental risks and local medical-epidemiological issues; - health care outside Italy through agreements with local public and private health centers or provided by Enis own health centers. Safety Eni is strongly committed to adopting a preventive approach to safety in order to reduce the occurrence of accidents and their consequences. Operations are managed with a special focus on the safety of workers, contractors and local communities. In line with international best practice, safety, prevention and work hygiene include: (i) identification of dangers, evaluation and reduction of risks related to the deployment of work activities; (ii) development and implementation of monitoring measures; (iii) investigation and analysis of accidents and near misses in order to learn from them and increase the ability to prevent and mitigate risks. In 2005, expenditure for safety on the workplace amounted to euro391 million, 57% of which were for new capital expenditure and the remaining share was dedicated to current expenses. Training and development Eni considers training one of the strong points of the management of human resources. The number of hours dedicated to training and the number of employees participating in training initiatives are evidence of Enis significant commitment in Italy and outside Italy. In 2005 in Italy a total of 1,178,943 training hours were provided to a total of 24,876 employees (1,322 managers, 5,023 junior managers, 12,265 employees and 6,266 workers) for a total of 103,151 participations. In 2005 expenditure for training amounted to euro22 million. Given the strategic value attributed to training and development, Eni established its own internal training structure capable of providing an optimal match between the companys strategies and the development of skills with the aim of matching the quality of human resources with corporate strategies, covering the whole cycle of knowledge, from the planning of requirements for critical skills to the construction of partnerships with universities for the creation of integrated academic courses, up to the selection of new talents and their training along their whole professional life cycle. Eni Corporate University was established to cover the fields of orientation, personnel selection, training and knowledge management and represents the institutional contact center with the network of academics in Italy and in the world for the development and dissemination of Enis corporate culture.

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An important part of Eni Corporate Universitys activity is performed by the Scuola Mattei, a post-graduate school for economics, energy and the environment open to students form all over the world. Industrial relations Industrial relations within a consolidated and structured system represented and efficient and consistent support to the Groups strategic choices and to the completion of reorganization processes underway. With Italian workers unions Eni defined four-year agreements concerning bonuses to be paid to workers in relation to company revenues (from 2004 to 2007) in the main segments where Eni is active. As for the renewal of expiring collective contracts (for the segments of energy and oil, chemicals and gas-water) negotiations between workers unions and companies organizations are underway. Internationally, the yearly meeting of Eni and the International Federation of Chemical, Energy, Mine and General Workers Union, promoted by the agreement on international industrial relations and on corporate social responsibility, highlighted some of Enis best practices in Kazakhstan and Egypt.

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RESPONSIBILITY TOWARDS THE ENVIRONMENT

Foreword Eni is aware of the strategic relevance of the prevention of and protection from risks of environmental contamination for the creation of sustainable value and as a contribution to sustainable development. In this context Eni is committed to finding innovative solutions in the field of energy and environmental sustainability and intends to play an active role by: (i) selecting initiatives to respond to climate change in the respect of the mechanisms and criteria of the Kyoto Protocol; (ii) supplying markets with fuels with low carbon intensity, expanding in natural gas; (iii) developing the integration of natural gas and power generation; (iv) developing more efficient technologies for hydrogen production and for the geological separation and confinement of CO 2 . Eni is committed to reducing its energy consumption and related emissions in the atmosphere, to reducing its consumption of water and its creation of waste. In the area of ground protection Eni is actively promoting the clean-up of its operating sites and the reclaiming of the inactive ones with the aim of remediating industrial areas. Strategies for the environment Implementation of the Kyoto protocol and use of flexible mechanisms and participation in the emission trading For the mitigation of climate change from 1 January 2005 in Europe and in Italy the European Scheme of Emission Trading (ETS) has been started that is targeted to industrial installations with high CO 2 emissions. Eni is part in this scheme with 61 plants in Italy and 2 outside Italy, which collectively represent about a third of all greenhouse gas emissions generated by Enis plants worldwide. In order to play an active role in the ETS Eni: (i) prepared a methodological and organizational protocol for the accounting of greenhouse gas emissions; (ii) implemented a database for a precise evaluation of emissions; (iii) evaluated the compliance of existing monitoring and reporting systems in plants in order to identify improvement requirements; (iv) defined a system for balancing emissions from individual plants and business units in order to guarantee the payback of emission rights due. Eni is also upgrading its ongoing program for the reduction of energy consumption and related CO 2 emissions. In addition to participating to the ETS system (for more detailed information on emission trading see Note 24 to Enis financial statements below), Eni is developing a portfolio of projects for the reduction of emissions based on the flexible mechanisms devised by the Kyoto Protocol (clean development mechanism - CDM and on joint implementation - JI). Eni presented to the CDM Executive Board its power generation unit of Kwale in Nigeria that exploits associated gas formerly flared and generates a reduction in greenhouse gas emissions corresponding to 1.5 million tonnes CO 2 /year. At the same time, Eni is carrying out other CDM projects and is studying opportunities in JI in the most promising countries for this kind of project.

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In the medium and long term, Enis main development plans concern CO 2 confinement in geological formations and the development of biomasses as energy sources. Development of low environmental impact energy sources Eni is committed to developing activities in the field of natural gas and enhancing relevant transport infrastructure. Natural gas can represent a strategic response to the problems posed by the interrelations of energy/development/environment. With the same volumes of energy employed, the amount of carbon dioxide produced by burning natural gas is 25-30% less than that produced by burning oil-based fuels and 40-50% less than that produced by burning coal. As a support to its general commitment to a reduction in greenhouse gas emissions, in the past few years Eni has started a significant program of expansion in the field of natural gas and intends to increase its role in gas marketing in Europe and in the area of LNG, also aimed at better exploiting its natural gas reserves in West and North Africa, the Far East and Central America. In this context Eni developed a few advanced projects, among which: (i) the Blue Stream gasline (Enis interest 50%), completed in 2002 that links Russia to Turkey across the Black Sea and represents the technologically most advanced pipeline in ultra deep waters, with its pipes laid at a maximum depth of 2,150 meters; (ii) the Greenstream gasline (Enis interest 75%) completed in 2005 and linking Libya to Italy. Power generation by means of combined cycle plants Through its subsidiary EniPower, Eni is a leading operator on the Italian market of power generation and is carrying out a relevant capital expenditure plan for enhancing its generation capacity through combined cycle plants. These plants are fired with natural gas and generate at the same time electricity and heat, allowing relevant energy savings and reducing environmental impact. Protection of the territory Enis commitment to the protection of the territory covers three main lines: (i) protection of biodiversity, (ii) research and development of new monitoring, prevention and intervention techniques, (iii) environmental reclamation and clean-up of polluted sites. Biodiversity A key factor for sustainable development is represented by the evaluation of the impact of industrial activities in terms of environmental pressure exerted and the safeguard of biodiversity, i.e. of all species of plants and animals from bacteria to higher organisms, of their genetic makeup, their habitats, their ecosystems and the functions they deploy. Eni is working on biodiversity in various areas in Italy and outside Italy. An example of how Eni is tackling this problem is represented by the AgriBioDiversity project carried out by Eni with a partner in Val dAgri in Southern Italy. The project, started in 2003, aims at defining a monitoring

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technique for the evaluation of the impact of hydrocarbon exploration and production and the definition of best practices for the protection of biodiversity. The most significant interventions of 2005 concerned: (i) monitoring of local fauna; (ii) mapping of genetic resources in the area; (iii) estimate of the ecological footprint of humans and socio-economic pressure on biodiversity. R&D Eni started a number of projects for implementing significant techniques for preventing soil pollution and reclaiming polluted sites. A number of Eni companies are directly involved in the field of decontamination of the soil and water bodies, with interventions ranging from the characterization of the contamination level of the site to the evaluation of health and environment risks and clean-up where necessary. The expertise acquired in this field allowed it to carry out research projects on innovative monitoring and reclaiming techniques (e.g. phytoremediation, reactive permeable barriers, wind bioventing and bioaugmentation). Environmental remediation and clean-up At the end of the life of works (closure of an oil well, of a building yard, of the laying of pipes, etc.) Eni is committed to bring the interested area to its pristine condition and where necessary to cleaning up and remediating the area. Eni is remediating and reclaiming soil and ground water also in areas that it purchased and where it had not operated directly. In 2005 expenditure for remediation and reclaiming of active and inactive sites amounted to euro 392 million, with a 51.6% increase from the previous year.

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RESPONSIBILITY TOWARDS STAKEHOLDERS

Foreword The effort of integrating with the most diverse social and cultural local entities is part of Enis tradition. In addition to providing significant development opportunities to the populations it comes in contact with, in particular through the creation of jobs and the transfer of know-how, Eni promotes cultural initiatives capable of stimulating their economic and social fabric and favoring sustainable growth processes. Development plans aimed at local communities follow a cycle that includes subsequent phases of planning, implementation and revision, of monitoring the results achieved, the difficulties encountered, performances and the ability to attain the objectives set. In its strategy of interventions for local communities Eni privileges programs and projects in the following areas: (i) HEALTH : supporting local health systems, providing basic assistance, infrastructure and training and fighting the diffusion of diseases; (ii) SOCIAL DEVELOPMENT : building social infrastructure and promoting projects capable of attaining autonomous development and integration in the socio-cultural context; (iii) EDUCATION AND TRAINING : contributing to the education and training of youth by means of basic education and technical, scientific, economic and management training; (iv) ENVIRONMENT : contributing to the protection of the environment by adopting innovative solutions and promoting actions for the conservation and protection of ecosystems; (v) CULTURE : favoring cultural exchange and the enhancement of the historical and artistic heritage by sponsoring institutions and activities in this area. In 2005 Enis expenditure in initiatives for local communities amounted to about euro 49 million. Stakeholder consultation and community involvement Eni intends to evaluate the overall impact of its activities at local level and to improve the consultation with the areas where it is present and with their social representatives also by adopting innovative management tools for identifying, analyzing and consulting its stakeholders: local authorities, communities, development agencies, non governmental organizations and other members of society. In some significant countries Nigeria, Ecuador, Kazakhstan and Norway Eni introduced this operating mode in order to increase the level of participation in its business activities and to better evaluate their consequences on the economic and social fabric of these areas. As a guarantee of local sustainability Eni extends to its programs in favor of local communities the rigorous, homogeneous and transparent reference principles and standards that it applies to the management of its business. Crucial elements of this approach are correct behaviors, the selection of qualified partners and the control on the definition and realization of each project. Furthermore, being convinced that development initiatives can represent a significant tool for contributing to the diffusion of legality, Eni included the principle of transparency, intended as a rigorous control of project governance, in its guidelines for investments in favor of local communities.

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A few cooperation projects for development A tight cooperation with local realities in all their components (communities, institutions, authorities, non governmental organizations active in the area) allowed in some contexts the activation of highly integrated social development programs. We present here a few examples (the full description is available on Enis website). Pakistan In cooperation with the local ONG Thardeep Rural Development Program (TRDP) Eni is carrying out a rural development project in Pakistan in the area of the Bhit natural gas field in the Kirthar region mainly focused on the issues of health, primary education, professional training and microcredit. The program aims at promoting the autonomous growth of communities by creating local development committees called Village Development Organizations. Since the inception of the project in 2002, a total of 313 committees have been set up, of these 13 in 2005. The presence of women is significant as 121 of these committees are managed by women. An important factor for the achievement of the programs objectives is a constant cooperation with international organizations working at development programs in Pakistan, such as the Save The Children Fund, the UNDP, the Pakistan Poverty Alleviation Fund, the WHO and the World Food Programme. This cooperation and the acquisition of knowledge by the communities are key elements for the success of projects. Among the numerous interventions performed by Eni in Pakistan worth mentioning are: the construction of a center for mothers and children at Jhangara and some rural health centers, as well as the provision of mobile clinics (49 in 2005) and ambulances. In 2005 nearly 32,000 persons made recourse to these centers, 12,000 in Jhangara. From the programs inception in 2002, about 94,000 persons attended the health centers. A new school building was erected as an integration to the program started in 2002, which has seen the construction of 9 schools in remote areas, two female professional training centers and a center for IT training at Jhangara. The development program includes also the installation of pumping systems and the supply of water for irrigation in an areas subject to frequent and severe draughts. Venezuela Eni is carrying out an integrated development program in DaciÓn in cooperation with SOCSAL (Servicio de Apoyo Local) aimed at monitoring and following up the activities performed by NGOs carrying out projects. Strong impulse to the sustainability of the projects was given by the strengthening of the local cooperative structure and by the complete transfer to local communities of the management of the rotational fund used for financing agricultural activities. The know-how acquired led also to the construction of greenhouses for plants destined to reforestation and to commercial use. As concerns continuous training and technical support of farmers provided by the FundaciÓn Técnico Agropecuaria del Guanape (FUNTAG) NGO in 2005 for the fourth consecutive year the Ministry of Agriculture certified that the area is free from animal diseases. A health care program also continued at the DaciÓn dispensary that was restructured by Eni and now has been acknowledged as the reference center for the area by the local health authorities. This center provided medical assistance to over 300 persons in 2005. Eni also sponsored the extension of the national vaccination campaign to two nearby municipalities which was addressed to over 20,000 persons. Central Asia Eni completed a few very significant infrastructure projects in Kazakhstan in the North Caspian (the region of the Kashagan field) and at Uralsk/Aksai (the region of the Karachaganak field) focused on the construction of health centers, schools and social structures. In the North Caspian area Eni is deploying a wide range of infrastructural projects in the Atyrau/Mangistau area which in 2005 concerned: (i) the construction of a primary school for 80 children; (ii) the restructuring of 3 schools, a polyclinic and an orphanage; (iii) the provision of 17 ambulances to health centers; (iv) the installation of gas distribution networks in various districts. In the Karachaganak area, at Uralsk in 2005 Enis interventions concerned: (i) the beginning of construction of a prenatal clinic; (ii) the completion of the surgical unit at the regional hospital and the construction of two schools and of the third section of a gas pipeline from Karachaganak to Chingirlau; (iii) the start-up of a business center aimed at promoting small and medium sized enterprises; the promotion of a mobile art school where a first exhibition of local art has been organized.

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West Africa In the Republic of Congo Eni started a project for the diagnosis and therapy of HIV/AIDS infections by means of mother-child transmission at the Hopital des Armeés of Pointe Noire in the Kouilou region. Within this project, carried out in cooperation with the Clinica delle malattie infettive of the University of Genova, a molecular biology and serology laboratory was opened with advanced equipment for the diagnosis of transmission. In addition to the restructuring of the building, the construction of rooms and of a radiology division, Eni worked also on an information campaign addressed to women. This center provides voluntary, anonymous and free screening, drug treatment, assistance during childbirth and prophylaxis for the infants in their first six months of life. The center can screen a population of 100,000 for three years and provide follow-up to 500 patients. At Pointe Noire doctors from Genova provide training to local medical and technical staff. During the year, as evidence of its commitment to the fight against AIDS in some of the areas where it is present, Eni continued to support Unicefs program for the prevention of the transmission of the HIV virus from mothers to babies in Nigeria, in rural areas of the Niger Delta. Promotion of culture and relations with the world of research Enis commitment to the world of culture was confirmed by the continuation of its traditional sponsorships of Italian musical institutions: Teatro alla Scala in Milan, Teatro La Fenice in Venice, Accademia di Santa Cecilia in Rome, Teatro Carlo Felice in Genova, Teatro Regio in Turin, Teatri Comunali at Ferrara and Bologna. Relations with musical and artistic institutions were evidenced also by the sponsorship of exhibitions and concerts, such as the Ravenna and Spoleto festivals and the FAI concerts.

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RISK MANAGEMENT

Foreword The main risks identified and managed by Eni are the following: (i) market risks deriving from the exposure to the fluctuations of interest rates, of exchange rates between the euro and the US dollar and the other currencies used by the company, as wells as the volatility of commodity prices; (ii) the credit risk deriving from the possible default of a counterparty; (iii) the liquidity risk deriving from the risk that suitable sources of funding for the Groups business activities may not be available; (iv) the operation risk deriving from the occurrence of accidents, malfunctioning, failures with damage to persons and the environment affecting operating and financial results; (v) country risk in oil & gas activities. Market risk Market risks include exchange rate risk, interest rate risk, commodity risk. Their management follows a set of guidelines and procedures that concentrate the treasury function in two captive finance companies operating in the Italian and international financial markets. In particular, the financial company operating on the domestic market (Enifin) manages all the transactions concerning currencies and derivative financial contracts. The commodity risk is managed by each business unit while Enifin manages the negotiation of hedging derivatives. In order to minimize market risk related to changes in interest rates, exchange rates and commodity prices, Eni enters into derivative financial and commodity hedging contracts for the purpose of reducing its exposure to market risk. Eni does not enter into derivative transactions on a speculative basis. Enis Board of Directors has defined a policy that requires the Treasury Department of Eni SpA to determine the maximum level of foreign exchange rate and interest rate risks that can be assumed by Enis finance companies. Such policy also defines the eligible counterparties in derivative transactions. Enis Treasury Department is responsible for monitoring compliance with Enis policy, as well as the correlation between the indicators adopted for measuring the tolerable risk level on a side and composition of the portfolios and market conditions on the other side. Enis operating subsidiaries are required to reduce foreign exchange rate risk to a minimum level by coordinating their operations with such finance companies. As far as interest rate and foreign exchange rate risks are concerned, calculation and measurement techniques followed by Enis finance companies are in accordance with established banking standards (such standards are established by the Basel Committee). However, the tolerable level of risk adopted by such companies is more conservative than the recommended one. Enis guidelines for the management of commodity risk contain maximum limits to the price risk deriving from trading activities. Coordination in this area is entrusted to a commodity risk assessment team, while the treasury department controls the respect of said limits and the development and updating of methodologies followed. Exchange rate risk Exchange rate risk derives from the fact that Enis operations are conducted in currencies other than the

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euro (in particular the US dollar) and by the time lag existing between the recording of costs and revenues denominated in currencies other than the functional currency and the actual time of the relevant monetary transaction (transaction exchange rate risk). An appreciation of the US dollar versus the euro generally has a positive impact on Enis results of operations. Interest rate risk Variations in interest rates affect the market value of financial assets and liabilities of the company and the level of financial changes. Commodity risk Enis results of operations are affected by changes in the prices of products and services sold. A decrease in oil prices generally has a negative impact on Enis results of operations and vice versa. Credit risk Credit risk is the potential exposure of the Group to loss in the event of non-performance by a counterparty. The credit risk arising from the Groups normal commercial operations is controlled by individual operating units within Group-approved guidelines. Enis financial companies follow guidelines approved by Enis treasury department on the choice of highly credit-rated counterparties in their use of financial and commodity instruments, including derivatives. Eni has not experienced material non-performance by any counterparty. As of 31 December 2005 Eni has no significant concentrations at credit risk. Liquidity risk Liquidity risk is the risk that suitable sources of funding for the Groups business activities may not be available. The Group has access to a wide range of funding at competitive rates through the capital markets and banks. The Group believes it has access to sufficient funding and has also both committed and uncommitted borrowing facilities to meet currently foreseeable borrowing requirements. Operation risks Enis activities present industrial and environmental risks and are therefore subject to extensive government regulations concerning environmental protection and industrial security in most countries. For example, in Europe, Eni operates industrial plants such as refineries and petrochemical complexes that meet the criteria of the European Union Seveso II directive for classification as high risk sites. The broad scope of Enis activities involves a wide range of operational risks such as those of explosion, fire or leakage of toxic products, production of non biodegradable waste. All these events could possibly damage or even destroy wells as well as related equipment and other property, cause injury or even death to persons or cause environmental damage. In addition, since exploration and production activities may take place on sites that are ecologically sensitive (tropical forest, marine environment, etc.), each site requires a specific approach to minimize the impact on the related ecosystem, biodiversity and human health. Eni adopted the most stringent standards for the evaluation and management of industrial and environmental risks, complying with local and international rules and standards. Business units evaluate through specific procedures the related industrial and environmental risks in addition to taking into account the regulatory requirements of the countries where these activities are located. Since 2003, Eni has introduced a Model of management system, a general procedure to be applied in all its operating sites, based on an annual cycle of planning, implementation, control, review of results and definition of new objectives. The model is directed towards the prevention of risks, the systematic monitoring and control of HSE performance in a continuous improvement cycle subject also to audits by internal and independent experts. At 31 December 2005 six system audits had been performed and four are planned for 2006. Any environmental emergency is managed by business units locally with their own organization under preset reaction plans to foreseeable events aimed at limiting damage and at activating adequate responses. Eni has two emergency rooms (at Milan and Rome) provided with real time monitoring systems for the collection of data on georeferenced maps for all Eni sites and logistics worldwide. In addition to its own emergency teams, Eni entered international agreements in order to maximize its ability to react in all its operating sites. At year-end 2005 Eni employed over 2,000 full time equivalent employees in HSE activities, prevention of environmental risk, safety and health. Country risk Substantial portions of Enis hydrocarbons reserves are located in countries outside the EU and North America,

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certain of which may be politically or economically less stable than EU or North American countries. At 31 December 2005, approximately 73% of Enis proved hydrocarbons reserves were located in such countries. Similarly, a substantial portion of Enis natural gas supplies comes from countries outside the EU and North America. In 2005, approximately 60% of Enis domestic supply of natural gas came from such countries. Negative developments in the economic and political framework of these countries can compromise temporarily or permanently Enis ability to operate economically and to have access to oil and natural gas reserves. Eni monitors constantly the political, social and economic risk of the approximately 100 countries where it invested or intends to invest with special attention to the evaluation of upstream investments. Country risks are mitigated by means of appropriate guidelines for risk management that Eni defined in its procedure for project risk assessment and management.

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INNOVATION

Foreword Eni continued its strong commitment to technological innovation as a support to its growth and expansion process with the aim of providing to its core business key technologies required for acquiring competitive advantages and making them sustainable and timely reacting to any opportunities or threats identified in long term scenarios. Technical excellence, based not only on the continuing commitment in R&D but also on the promotion and dissemination of experience, professionalism and know-how, represents for Eni a basic factor for the competitivity and environmental and economic sustainability of its operations. In 2005, Eni invested euro 204 million in research and development (euro 257 million in 2004), of these 32% were directed to Enis corporate department, 25% to the Exploration & Production segment, 24% to the Petrochemical segment and 13% to the Refining & Marketing segment. At 31 December 2005, a total of 1,420 persons were employed in research and development activities. In 2005 a total of 26 applications for patents were filed. The main research lines aimed at innovation concerned: (i) Reduction of exploration and development costs: - Geosciences - High resolution geophysical prospecting techniques - Field simulation models - While drilling prospecting techniques - Methods for increasing field productivity - Advanced drilling systems - Production in hostile environments - Sulphur management (ii) Feedstocks enhancement: - Conversion of heavy crudes and refinery fractions into light products - Long distance gaslines - Conversion of gas into liquid products (iii) Performance and product differentiation: - Advanced process control - Innovative polymerization catalysis (iv) Environmental protection: - New formulas for fuels and lubricants - Clean catalytic processes - Advanced techniques for hydrogen production - GHG management by means of carbon sequestration - Innovative techniques for monitoring air and water quality, biodiversity and for the reclamation of polluted soils. Main initiatives in innovation Among the main initiatives in the field of innovation for sustainable development the following are worth mentioning: Drilling of Advanced Wells Lean profile Technology Eni developed and applied at industrial level a series of innovative technologies that allow to drill highly complex wells with greater operating efficiency. In particular, lean profile drilling, developed and patented by Eni, is applied in deep vertical and deviated wells especially in high pressure and high temperature environments allowing a reduction in time and costs and in environmental impact as it reduces the use of

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products for mud and cement and the resulting waste by about 30-40%. Wells obtained with this technique are high quality and low risk. The technique basically consists in reducing to a minimum the tolerance between the diameter of wells and their lining columns while keeping the production casing unchanged. The application underway in Val dAgri is a record lean drilling in highly deviated wells (a 13"3/8 casing in a 14"3/4 hole with inclination up to 60°). High Resolution Geophysical Prospecting Techniques In the area of seismic imaging, the further developments of the proprietary 3D Common Reflection Surface (CRS) Stack technology found various industrial applications with much higher efficiency than conventional techniques. New depth imaging techniques based on proprietary algorithms can generate depth images with such high resolution that they allow a very precise physical characterization of reservoirs. A new 3D resistivity modeling interpretive technique has been developed for the petrophysical measurement of wells (electrical logs), especially suited for the identification of complex mineralization situations, such as thin strata of sand and clay. Initial field applications proved that this new approach contributes to the production of more accurate estimates of reserves in place. Sulphur management Integrated research program on H 2 S and sulphur management in E&P In 2006 the integrated research program called H 2 S and sulphur management in E&P operations will be completed. The program was aimed at identifying innovative solutions for the treatment of very sour gas. In particular significant progress was achieved in an innovative technology for H 2 S bulk removal and in a new system for the massive storage of sulphur. Natural gas transport - The TAP Project Among the reliable technologies for making the transmission via pipeline of relevant amounts of natural gas from production areas to consuming markets economically viable (gas to market), the TAP (high pressure transport) project will contribute to developing the most advanced long distance, high capacity, high pressure and high grade solutions with relevant targets related to: (i) distances over 3,000 kilometers; (ii) natural gas volumes to be transported of about 20-30 billion cubic meters/year; (iii) pressure equal to or higher than 15 Mpa; (iv) use of high and very high grade steel (e.g. X100). The TAP technology is expected to allow a decrease in the consumption of natural gas used in compressor stations from 7.5% to 3% of transported volumes. The project was started in 2002 with a wide range of design, engineering and construction activities and in 2005 two infrastructures for the validation of its assumptions were completed. The first one is a 10-kilometer long pilot segment in X 80 steel with 48 diameter from Enna to Montalbano integrated in the Snam Rete Gas network that allowed to test and validate the industrial application of the concepts. The second infrastructure consists of two pilot pipes, with a 48 inch diameter in high resistance X100 steel installed in Perdasdefogu in Sardinia. It was started up in September 2005 under pressures of 140 bar. Testing is expected to last 20 months and will simulate the actual behavior of an industrial infrastructure for a period equivalent to 20 years. In early 2006 the first technology manual and FEED developed for a hypothetical trunkline in X100 steel with a 48 diameter linking Central Asia to Europe (for a length of 3,500 kilometers) will be available. A further development of this project will be the construction and operation of a commercial line in X100 steel a few kilometers long. Conversion of gas to liquids - GTL project This is a key technology for the use of natural gas on a large scale for the production of high quality motor fuels, in particular diesel fuel and therefore it receives special attention by all majors due to its primary strategic value. Enis R&D activities in 2005 led to the preparation of the first basic design package for an industrial unit. In 2006 Eni will continue its development activity at the Sannazzaro pilot plant consolidating the Fischer-Tropsch synthesis and optimizing its integration in the first two phases in order to define the optimal size of the GTL module along with its basic design package. Conversion of heavy crudes and fractions into light products Eni Slurry Technology EST is a process of catalytic hydroconversion in the slurry phase that allows to convert asphaltenes (the hard fraction of heavy crudes) totally, thus reducing to zero the production of solid and fluid residues usually deriving from the refining of non conventional oil. It is a flexible technology that satisfies the needs of upstream and downstream oil and can be adapted to

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various kinds of feedstocks to be converted, to different capacities and plants. Among its products are naphtha, kerosene, diesel fuel. The development of this technology was started at the beginning of the 80s and the decision to test it industrially made possible in 2001 the building of a commercial demonstration plant with a 1,200 barrels/day capacity at Enis Taranto refinery completed in 2005. It is currently being run for reaching the validation of the technology. This will provide Eni with an important competitive lever for a more economic use of the full barrel of crude with lower environmental impact. Reformulation of fuels and lubricants: Clean Diesel Fuel Program In its effort to improve the quality of its fuels, in 2002 Eni started to sell new virtually sulphur free (less than 10 ppM) products (first BluDiesel and since 2004 BluSuper) anticipating their compliance with EU regulations mandatory from 2009. With a longer term objective Eni started a clean diesel fuel program that aims at identifying the optimal formula for a diesel fuel with high performance and low particulate emissions using as benchmark GTL Fischer-Tropsch gasoil. Environmental protection In the area of environmental protection, with the cooperation of partners from industries and academia, Eni is developing technologies for reducing the environmental impact of offshore and onshore E&P and refining operations. In this area the following projects are worth mentioning: - the integrated Green House Gases research program, aimed at verifying the industrial feasibility of the geological sequestration of CO 2 in depleted fields and salty aquifers; - the Early Warning Monitoring System (EWMS) project, for real time recording of the physical and chemical profiles of Enis productive activities and of their environmental context through a single computerized platform; - the hydrogen project, aimed at developing a portfolio of technologies for producing hydrogen at competitive costs, also in medium to small sized plants.

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Glossary FINANCIAL TERMS Dividend Yield Measures the return on a share based on dividends for the year. Calculated as the ratio of dividends per share of the year and the average reference price of shares in the last month of the year. Leverage It is a measure of a companys debt, calculated as the ratio between net financial debt and shareholders equity, including minority interests. ROACE Return On Average Capital Employed, is the return on average capital invested, calculated as the ratio between net income before minority interests, plus net financial charges on net financial debt, less the related tax effect and net average capital employed. TSR (Total Shareholder Return) Measures the total return of a share calculated on a yearly basis, keeping account of changes in prices (beginning and end of year) and dividends distributed and reinvested at the ex dividend date. OIL AND NATURAL GAS ACTIVITIES Average reserve life index Ratio between the amount of reserves at the end of the year and total production for the year. Barrel Volume unit corresponding to 159 liters. A barrel of oil corresponds to about 0.137 metric tons. Boe Barrel of Oil Equivalent It is used as a standard unit measure for oil and natural gas. The latter is converted from standard cubic meters into barrels of oil equivalent using a coefficient equal to 0.00615. Concession contracts Contracts currently applied mainly in Western countries regulating relationships between States and oil companies with regards to hydrocarbon exploration and production. The company holding the mining concession has an exclusive on mining activities and for this reason it acquires a right on hydrocarbons extracted, against the payment of royalties to the State on production and taxes on oil revenues. Condensates These are light hydrocarbons produced along with gas, that condense to a liquid state at normal temperature and pressure for surface production facilities. Deep waters Waters deeper than 200 meters. Development Drilling and other post-exploration activities aimed at the production of oil and gas. Elastomers (or Rubber) Polymers, either natural or synthetic, which, unlike plastic, when stress is applied, return to their original shape, to a certain degree, once the stress ceases to be applied. The main synthetic elastomers are polybutadiene (BR), styrene-butadiene rubbers (SBR), ethylene-propylene rubbers (EPR), thermoplastic rubbers (TPR) and nitrylic rubbers (NBR). Enhanced recovery Techniques used to increase or stretch over time the production of wells. EPC (Engineering, Procurement, Commissioning) a contract typical of onshore construction of large plants in which the contractor supplies engineering, procurement and construction of the plant. The contract is defined turnkey when the plant is supplied for start-up. EPIC (Engineering, Procurement, Installation Commissioning) a contract typical of offshore construction of complex projects (such as the installation of production platforms or FPSO systems) in which the global or main contractor, usually a company or a consortium of companies, supplies engineering, procurement, construction of plant and infrastructure, transport to the site and all preparatory activities for the start-up of plants. Exploration Oil and natural gas exploration that includes land surveys, geological and geophysical studies, seismic data gathering and analysis, and well drilling. FPSO vessel Floating, Production, Storage and Offloading system made up of a large capacity oil tanker including a large hydrocarbon treatment plant. This system, moored at the bow in order to maintain a geostationary position, is in fact a temporary fixed platform linking by means of risers from the seabed the underwater wellheads to the treatment, storage and offloading systems onboard. Infilling wells Infilling wells are wells drilled in a producing area in order to improve the recovery of hydrocarbons from the field and to maintain and/or increase production levels. LNG Liquefied Natural Gas obtained through the cooling of natural gas to minus 160 °C at normal pressure. The gas is liquefied to allow transportation from the place of extraction to the sites at which it is transformed and consumed. One ton of LNG corresponds to 1,400 cubic meters of gas. LPG Liquefied Petroleum Gas, a mix of light petroleum fractions, gaseous at normal pressure and easily liquefied at room temperature through limited compression.

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Mineral Potential (Potentially recoverable hydrocarbon volumes) Estimated recoverable volumes which cannot be defined as reserves due to a number of reasons, such as the temporary lack of viable markets, a possible commercial recovery dependent on the development of new technologies, or for their location in accumulations yet to be developed or where evaluation of known accumulations is still at an early stage. Mineral Storage Volumes of natural gas required for allowing optimal operation of natural gas fields in Italy for technical and economic reasons. Modulation Storage Volumes of natural gas required for meeting hourly, daily and seasonal swings of demand. Natural gas liquids Liquid or liquefied hydrocarbons recovered from natural gas through separation equipment or natural gas treatment plants. Propane, normal-butane and isobutane, isopentane and pentane plus, that used to be defined natural gasoline, are natural gas liquids. Network Code A Code containing norms and regulations for access to, management and operation of natural gas pipelines. Offshore/Onshore The term offshore indicates a portion of open sea and, by induction, the activities carried out in such area, while onshore refers to land operations. Olefins (or Alkenes) Hydrocarbons that are particularly active chemically, used for this reason as raw materials in the synthesis of intermediate products and of polymers. Over/Under lifting Agreements stipulated between partners regulate the right of each to its share in the production of a set period of time. Amounts different from the agreed ones determine temporary Over/Under lifting situations. Possible reserves Amounts of hydrocarbons that have a lower degree of certainty than probable reserves and are estimated with lower certainty, for which it is not possible to foresee production. Probable reserves Amounts of hydrocarbons that are probably, but not certainly, expected to be extracted. They are estimated based on known geological conditions, similar characteristics of rock deposits and the interpretation of geophysical data. Further uncertainty elements may concern: (i) the extension or other features of the field; (ii) economic viability of extraction based on the terms of the development project; (iii) existence and adequacy of transmission infrastructure and/or markets; (iv) the regulatory framework. Production Sharing Agreement Contract in use in non OECD area countries, regulating relationships between State and oil companies with regards to the exploration and production of hydrocarbons. The mining concession is assigned to the national oil company jointly with the foreign oil company who has exclusive right to perform exploration, development and production activities and can enter agreements with other local or international entities. In this type of contract the national oil company assigns to the international contractor the task of performing exploration and production with the contractors equipment and financial resources. Exploration risks are borne by the contractor and production is divided into two portions: cost oil is used to recover costs borne by the contractor, profit oil is divided between contractor and national company according to variable schemes and represents the profit deriving from exploration and production. Further terms and conditions may vary from one country to the other. Proved reserves Proved reserves are estimated volumes of crude oil, natural gas and gas condensates, liquids and associated substances which are expected to be retrieved from deposits and used commercially, at the economic and technical conditions applicable at the time of the estimate and according to current legislation. Proved reserves include: (i) proved developed reserves: amounts of hydrocarbons that are expected to be retrieved through existing wells, facilities and operating methods; (ii) non developed proved reserves: amounts of hydrocarbons that are expected to be retrieved following new drilling, facilities and operating methods. On these amounts the company has already defined a clear development expenditure program which is expression of the companys determination. Recoverable reserves Amounts of hydrocarbons included in different categories of reserves (proved, probable and possible), without considering their different degree of uncertainty. Reserve replacement ratio Measure of the reserves produced replaced by proved reserves. Indicates the companys ability to add new reserves through exploration and purchase of property. A rate higher than 100% indicates that more reserves were added than produced in the period. The ratio should be averaged on a three-year period in order to reduce the distortion deriving from the purchase of property or upstream assets, the revision of

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previous estimates, enhanced recovery, improvement in recovery rates and changes in the value of reserves in PSAs due to changes in international oil prices. Ship-or-pay Clause included in natural gas transportation contracts according to which the customer for which the transportation is carried out is bound to pay for the transportation of the gas also in case the gas is not transported. Strategic Storage Volumes of natural gas required for covering lack or reduction of supplies from extra-European sources or crises in the natural gas system. Take-or-pay Clause included in natural gas transportation contracts according to which the purchaser is bound to pay the contractual price or a fraction of such price for a minimum quantity of the gas set in the contract also in case it is not collected by the customer. The customer has the option of collecting the gas paid and not delivered at a price equal to the residual fraction of the price set in the contract in subsequent contract years. Upstream/Downstream The term upstream refers to all hydrocarbon exploration and production activities. The term downstream includes all activities inherent to the oil sector that are downstream of exploration and production activities. Wholesale sales Domestic sales of refined products to wholesalers/distributors (mainly gasoil), public administrations and end consumers, such as industrial plants, power stations (fuel oil), airlines (jet fuel), transport companies, big buildings and households. Do not include distribution through the service station network, marine bunkering, sales to oil and petrochemical companies, importers and international organizations. Workover Intervention on a well for performing significant maintenance and substitution of basic equipment for the collection and transport to the surface of liquids contained in a field.

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Report of independent auditors

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Effects of the adoption of IFRS 1 Starting in 2005 companies with securities listed on a regulated stock market of a Member State of the European Union are required to prepare their consolidated financial statements in accordance with the international accounting principles (IFRS) approved by the European Commission. At 1 January 2004, date of the first application of the new accounting principles, which corresponds with the first period to be compared, Eni must present a balance sheet which: - reports all and only the assets and liabilities accounted under the new accounting principles; - accounts the assets and liabilities as if the new accounting principles had always been applied (retrospective method); - reclassifies the items indicated under different principles instead of IFRS. The effect of the adjustments of the initial balance of assets and liabilities to the new accounting principles has been accounted with a corresponding entry to shareholders equity, taking account of the relevant fiscal effects to be recognized as deferred tax liabilities or deferred tax assets. In application of IFRS 1, the following is the indication of: (i) balance sheet at 31 December 2004 restated under IFRS; (ii) profit and loss account of 2004 restated under IFRS; (iii) the reconciliation between shareholders equity, including minority interest, of 2003 and 2004 reported under Italian GAAP and shareholders equity under IFRS; (iv) the reconciliation between net profit of the Group at 31 December 2004 reported under Italian GAAP and net profit under IFRS. The reconciliation following the application of IFRS 1 underwent a full audit by PricewaterhouseCoopers SpA. The international accounting principles are reported in the section Principles of consolidation. The main options provided under IFRS 1 and adopted in the first time application of IFRS concern the non-reopening of the business combinations and the designation of 1 January 2005, as the date of the first application of IAS 32 and 39, concerning the valuation of financial instruments, including derivatives. Inclusion of Saipem in consolidation As regards to the information reported in the reports of the year 2005, the following restatements and reconciliations has been modified to include the recent guidelines of the International Accounting Standards Board (IASB), relating to the conception of de facto control and providing the inclusion in the scope of the consolidation of the Saipem SpA and its subsidiaries. Saipem SpA, in which Eni held a 43.26% share of voting stock as of 31 December 2005, was excluded from consolidation due to a restrictive interpretation of the provisions of IAS 27 Consolidated Financial Statements and Accounting for Investments in Subsidiaries, according to which full consolidation is admissible only if the parent company holds the majority of voting rights exercisable in ordinary shareholders meetings, or failing this, when there exists an agreement among shareholders or other situations that give to the parent company the power to appoint the majority of the Board of Directors. Under this interpretation Saipem SpA, despite being controlled by Eni in accordance with article 2359, paragraph 2 of the Italian Civil Code, was accounted for under the equity method. IASB is reviewing the requirements of IAS27; in October 2005, IASB Update published a statement indicating that the concept of control as defined by IAS 27 included the situation as described by article 2359, paragraph 2 of the Italian Civil Code, despite the fact that the lack of precise indications allows also for a different interpretation of this standard. IASB declared its intention to provide more detailed indications on the exercise of control in its new version of IAS 27. In consideration of the intention expressed by IASB, Eni included Saipem SpA and its subsidiaries in consolidation under IFRS starting 1 January 2004, with the aim of giving an economic and financial state of the Group more consistent with its commercial situation.

(1) Under the requirements of paragraph 5 of Preface to International Financial Reporting Standards, IFRS (International Financial Reporting Standards) represent the principles and the interpretations adopted by the International Accounting Standards Board (IASB), former International Accounting Standards Committee (IASC) and include: (i) International Financial Reporting Standards (IFRS); (ii) International Accounting Standards (IAS); (iii) the interpretations issued by International Financial Reporting Interpretation Committee (IFRIC) and by Standing Interpretation Committee (SIC) adopted by IASB. The name International Financial Reporting Standards (IFRS) has been adopted by IASB for the principles issued afterwards May 2003.

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Balance sheet at 31 December 2004 The following is the reconciliation to IFRS of balance sheet at 31 December 2004:

(million euro) 2004 Exclusion of joint venture Pro-forma Adjustments IFRS

ASSETS
Current
assets
Cash and cash equivalent	1,264	(261	)	1,003			1,003
Other
financial assets for trading or held for sale	1,292	(4	)	1,288	(22	)	1,266
Trade and other receivables	13,715	(95	)	13,620	114		13,734
Inventories	2,658	(135	)	2,523	324		2,847
Income tax receivables	702	(28	)	674			674
Other
current assets	629	(1	)	628	(40	)	588
Total current assets	20,260	(524	)	19,736	376		20,112
Non-current
assets
Property, plant and equipment	37,616	(293	)	37,323	3,263		40,586
Inventories
- compulsory stock	662			662	724		1,386
Intangible assets	3,190			3,190	123		3,313
Investments
accounted for using the equity method	2,753	313		3,066	90		3,156
Other investments	529			529			529
Other
financial assets	932	4		936			936
Deferred tax assets	2,203			2,203	(376	)	1,827
Other
non-current assets	967	(17	)	950	58		1,008
Total non-current assets	48,852	7		48,859	3,882		52,741
TOTAL
ASSETS	69,112	(517	)	68,595	4,258		72,853
LIABILITIES AND SHAREHOLDERS EQUITY
Current
liabilities
Current financial liabilities	4,115	35		4,150			4,150
Current
portion of long-term debt	936	(9	)	927			927
Trade and other payables	11,008	(469	)	10,539	(6	)	10,533
Taxes
payable	2,514	(16	)	2,498			2,498
Other current liabilities	517	(12	)	505			505
Total
current liabilities	19,090	(471	)	18,619	(6	)	18,613
Non-current liabilities
Long-term
debt	7,674	17		7,691	(84	)	7,607
Reserves for contingencies and charges	6,107	(4	)	6,103	(367	)	5,736
Provisions
for employee benefits	820	(5	)	815	167		982
Deferred tax liabilities	2,533	(59	)	2,474	1,474		3,948
Other
non-current liabilities	422	5		427			427
Total non-current liabilities	17,556	(46	)	17,510	1,190		18,700
TOTAL
LIABILITIES	36,646	(517	)	36,129	1,184		37,313
SHAREHOLDERS EQUITY
Minority
interests	2,128			2,128	1,038		3,166
Eni
shareholders equity	30,338	(1)		30,338	2,036		32,374
TOTAL
SHAREHOLDERS EQUITY	32,466			32,466	3,074		35,540
TOTAL LIABILITIES AND SHAREHOLDERS
EQUITY	69,112	(517	)	68,595	4,258		72,853

(1) Net of treasury shares in portfolio at the date for euro 3,229 million (IFRS require that treasury shares be deducted from shareholders equity).

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Profit and loss account at 31 December 2004 The following is the reconciliation to IFRS of profit and loss account of 2004:

(million euro) 2004 Exclusion of joint venture Restatement of extraordinary items Pro-forma Adjustments IFRS

| Net sales from operations — Other
income and revenues | 58,382 — 1,298 | | (916 — (12 | ) — ) | 79 | | 57,466 — 1,365 | | 79 — 12 | | 57,545 — 1,377 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Purchases, services and other | (39,092 | ) | 679 | | (623 | ) | (39,036 | ) | 689 | | (38,347 | ) |
| Payroll
and related costs | (3,264 | ) | 64 | | (54 | ) | (3,254 | ) | 9 | | (3,245 | ) |
| Depreciation, amortization and impairments | (4,861 | ) | 72 | | (18 | ) | (4,807 | ) | (124 | ) | (4,931 | ) |
| Operating
profit | 12,463 | | (113 | ) | (616 | ) | 11,734 | | 665 | | 12,399 | |
| Financial expense, net | (95 | ) | (6 | ) | | | (101 | ) | (55 | ) | (156 | ) |
| Other
income (expense) from investments | 229 | | 81 | | 608 | | 918 | | (98 | ) | 820 | |
| Profit before extraordinary items and income
taxes | 12,597 | | (38 | ) | (8 | ) | 12,551 | | 512 | | 13,063 | |
| Extraordinary
items | (56 | ) | | | 56 | | | | | | | |
| Profit before income taxes | 12,541 | | (38 | ) | 48 | | 12,551 | | 512 | | 13,063 | |
| Income
taxes | (4,653 | ) | 38 | | (48 | ) | (4,663 | ) | (859 | ) | (5,522 | ) |
| Profit before minority interest | 7,888 | | | | | | 7,888 | | (347 | ) | 7,541 | |
| Minority
interest in net profit | (614 | ) | | | | | (614 | ) | 132 | | (482 | ) |
| Net profit | 7,274 | | | | | | 7,274 | | (215 | ) | 7,059 | |

Reconciliation of shareholders equity at 31 December 2003 The following is the reconciliation of shareholders equity of 2003 Annual Report, including minority interest, determined under Italian GAAP to IFRS:

(million euro)

Items (*)	2003 Shareholders equity	28,318
1.	Different
useful lives of gas pipelines, compression stations,
distribution networks and other assets	1,570
2.	Different recognition of deferred tax	1,233
3.	Application
of the weighted-average cost method instead of LIFO in
inventory valuation	479
4.	Different criteria of capitalization of
financial charges	394
5.	Different
recognition of the reserve for contingencies	269
6.	Effect of the capitalization of estimated costs
for asset retirement obligations	152
7.	Underlifting	61
8.	Write-off of the difference between nominal and
present value of deferred taxation in business
combinations	(514	)
9.	Adjustment
of tangible and intangible assets	(189	)
10.	Employee benefits	(92	)
11.	Effects on
investments accounted for under the equity method	(43	)
	Other net adjustments	(121	)
	Net
changes	3,199
	Shareholders equity under IFRS	31,517

(*) Each number refers to the illustration provided in the next paragraph Description of main changes.

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Reconciliation of shareholders equity at 31 December 2004 The following is the reconciliation of shareholders equity of 2004 Annual Report, including minority interest, determined under Italian GAAP to IFRS:

(million euro)

Items (*)

| 1. | 2004
Shareholders equity — Different useful lives of gas pipelines,
compression stations, distribution networks and other
assets | 32,466 — 1,501 | |
| --- | --- | --- | --- |
| 2. | Different
recognition of deferred tax | 563 | |
| 3. | Application of the weighted-average cost method
instead of LIFO in inventory valuation | 677 | |
| 4. | Different
criteria of capitalization of financial charges | 393 | |
| 5. | Different recognition of the reserve for
contingencies | 295 | |
| 6. | Effect of
the capitalization of estimated costs for asset
retirement obligations | 215 | |
| 7. | Underlifting | 87 | |
| 8. | Write-off
of the difference between nominal and present value of
deferred taxation in business combinations | (470 | ) |
| 9. | Adjustment of tangible and intangible assets | (130 | ) |
| 10. | Employee
benefits | (81 | ) |
| 11. | Effects on investments accounted for under the
equity method | 79 | |
| 12.2 | Amortization
of goodwill | 102 | |
| | Other net adjustments | (157 | ) |
| | Net
changes | 3,074 | |
| | Shareholders equity under IFRS | 35,540 | |

(*) Each number refers to the illustration provided in the next paragraph Description of main changes.

Reconciliation of consolidated net profit at 31 December 2004 The following is the reconciliation of net profit of 2004 Annual Report determined under Italian GAAP to IFRS:

(million euro)

Items (*)

| 1. | 2004 consolidated net profit under
Italian GAAP — Different
useful lives of gas pipelines, compression stations,
distribution networks and other assets | 7,274 — (70 | ) |
| --- | --- | --- | --- |
| 2. | Different recognition of deferred tax | (671 | ) |
| 3. | Application
of the weighted-average cost method instead of LIFO in
inventory valuation | 199 | |
| 4. | Different criteria of capitalization of
financial charges | (3 | ) |
| 5. | Different
recognition of the reserve for contingencies | 31 | |
| 6. | Effect of the capitalization of estimated costs
for asset retirement obligations | 63 | |
| 7. | Underlifting | 33 | |
| 8. | Write-off of the difference between nominal and
present value of deferred taxation in business
combinations | 38 | |
| 9. | Adjustment
of tangible and intangible assets | 39 | |
| 10. | Employee benefits | 8 | |
| 11. | Effects on
investments accounted for under the equity method | 126 | |
| 12. | Other changes in 2004 results under IFRS | (109 | ) |
| 12.1 | Adjustment
on gain from sale of a 9.054% interest in Snam Rete Gas | (211 | ) |
| 12.2 | Amortization of goodwill | 102 | |
| | Other net
adjustments | (31 | ) |
| | Effect of IFRS adjustment on minority interest (1) | 132 | |
| | Net
changes | (215 | ) |
| | Shareholders
equity under IFRS | 7,059 | |

| (*) | Each number
refers to the illustration provided in the next paragraph
Description of main changes. |
| --- | --- |
| (1) | This adjustment derives
from the attribution of their share of IFRS adjustments
to minority interest. |

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Description of main changes The following is a description of the main changes introduced in the balance sheet of Eni for 2003, whose effects are reflected in the profit and loss account and balance sheet for the 2004 and in the balance sheet at 31 December 2004. 1. Different useful lives of gas pipelines, compression stations, distribution networks and other assets This change concerns essentially the natural gas transport pipelines, compression stations and distribution networks that until 1999 were depreciated in accordance with Italian practice applying rates established by tax authorities (10%, 10% and 8%, respectively) both in statutory and consolidated financial statements. In consolidated financial statements prepared in accordance with U.S. GAAP, these assets were depreciated at a 4% rate, based on the international estimate of a 25-year long useful life. The useful life of gas pipelines, compression stations and distribution networks was changed in 2000 following a determination of tariffs for natural gas sale by the Italian Authority for Electricity and Gas which set the useful life of gas pipelines at 40 years, that of compression stations at 25 years and that of distribution networks at 50 years. Therefore, considering this change as a revision of previous estimates, starting in 2000 the value of these assets, net of amortization reserves at 31 December 1999, was depreciated based on their residual useful life both under Italian and U.S. GAAP. For the first application of IFRS, the adoption of the retrospective method implies the adoption of the new principles as if they had always been applied using the best information available at each time frame. Therefore, the book value of gas pipelines, compression stations and distribution networks, at 1 January 2004 was restated by using until 1999 the internationally accepted rate of 25 years, from 2000 onwards the residual value was depreciated according to the useful lives estimated by the Authority. Consistent with this approach, the book value of tanker ships at 1 January 2004 was restated due to the revision of their useful life using until 2001 the internationally accepted rate of 20 years; from 2002 onwards their residual value was depreciated according to an estimated useful life of 30 years defined after their conferral from Snam SpA to LNG Shipping SpA. Under Italian GAAP the book value of complex assets is divided according to various tax categories on the basis of the depreciation rate tables contained in a Decree of the Ministry of Economy and Finance. Under IFRS the components of a complex asset, that have different useful lives, are recorded separately in order to be depreciated according to their useful life; land parcels, that cannot be depreciated, are recorded separately even when they are bought along with buildings. The restatement determined an increase in fixed assets of euro 2,563 million with a corresponding entry to shareholders equity (euro 1,570 million) and to deferred tax liabilities (euro 993 million). The adoption of IFRS determined a decrease in 2004 results of euro 70 million. 2. Different recognition of deferred tax Changes in shareholders equity of euro 1.233 were determined in particular by the following causes. 2.1 RECOGNITION OF DEFERRED TAX ASSETS ON THE REVALUATION OF ASSETS (LAW 342/2000) Under Italian GAAP deferred tax assets are recorded if recoverable with reasonable certainty. Under IFRS deferred tax assets are recorded if their recovery is more likely than not. In 2000 Snam SpA, now merged into Eni SpA, revalued its assets as permitted by Law 342/2000 aligning their book value to their fair value. On this revaluation of depreciable assets Eni paid a special rate tax (19% instead of the statutory 34% rate), thus recording a deferred tax asset. Enis transport assets were conferred in 2001 to Snam Rete Gas SpA. The revaluation carried out had no impact on Enis consolidated financial statements; but a temporary difference arose between the taxable value and the book value which led, in accordance with Italian GAAP, to the recognition of a provision for deferred tax assets that amounted to euro 629 million at 31 December 2003, corresponding to 19% 2 of depreciation estimated in the 2004-2007 plan on the deductible timing difference. Under IFRS, deferred taxes are to be recognized on the entire timing difference at the current statutory tax rate (37.25%). The application of this principle determined an increase in deferred tax assets of euro 828 million with a corresponding entry to shareholders equity. The adoption of IFRS determined a decrease in 2004 results of euro 266 million, following the reversal of taxes related to accelerated depreciations 3 .

| (2) | Taking
account the later conferral of assets to Enis
subsidiary Snam Rete Gas SpA, the timing difference was
considered analogous to that deriving from the
cancellation of intra-group profits; under Italian GAAP
the adopted 19% rate is equal to taxes paid by the
conferring entity, not to the taxes recoverable by the
receiving entity, Snam Rete Gas SpA. |
| --- | --- |
| (3) | Reversal
means the effect taken to profit or loss of deferred tax
assets and liabilities entered in previous years
following the effect of the annulment of the temporary
difference which generated them. |

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2.2 RECOGNITION OF DEFERRED TAX ASSETS ON STOGITS INVENTORIES In 2003 Stoccaggi Gas Italia SpA (Stogit), applying Law 448/2001, realigned the fiscal value to the higher book value of assets received upon contribution in kind. In the consolidated financial statements these assets were stated at their book value, this determined a timing difference over the fiscal values from which a deferred tax asset of euro 287 million was recognized in the consolidated financial statements. A portion of the timing difference concerns the inventories of natural gas; however, in 2003 consolidated financial statements the deferred tax asset related to the timing difference on natural gas inventories was not recognized on the assumption that its recoverability was not reasonably certain at the end of the concession, if not renewed. The application of IFRS determined the recognition of deferred tax assets of euro 259 million, with a corresponding entry to shareholders equity. In 2004 consolidated financial statements the deferred tax assets were recognized on the temporary difference related to inventories because Law 239/2001 (so called Marzano Law) permitted to set the year of recoverability 4 ; such effect determined the equivalent decrease in the 2004 result. 2.3 OTHER EFFECTS OF THE DIFFERENT RECOGNITION OF DEFERRED TAX ASSETS The application of the more likely than not criterion rather than that of the reasonable certainty of recoverability of other deductible temporary differences determined the recognition of deferred tax assets of euro 146 million with a corresponding entry to shareholders equity. Such deferred taxes were recognized in 2004 consolidated financial statements following the fulfillment of the conditions for their recognition; such effect resulted the equivalent decrease in the 2004 result. 3. Application of the weighted-average cost method instead of LIFO Under Italian GAAP the cost of inventories may be determined with the weighted-average cost method or with the FIFO or LIFO methods. Until 2004 Eni adopted the LIFO method, in its evaluation of crude oil, natural gas and oil products inventories applied on an annual basis. IFRS do not allow the use of the LIFO method; they allow the FIFO method and the weighted-average cost. The application of the weighted-average cost on a three-month basis in the evaluation of crude oil, natural gas and refined products inventories determined an increase in the value of inventories of euro 764 million 5 with a corresponding entry to shareholders equity (euro 479 million) and to deferred tax liabilities (euro 285 million). With the application of the LIFO method, changes in oil and refined products prices had no impact on the evaluation of inventories, that was affected only by declines in volumes. With the adoption of the weighted-average cost, changes in oil and refined products prices have a direct effect with the recognition of profit or loss on stock deriving from the difference between the current cost of products sold and the cost deriving from the application of the weighted-average cost method. The adoption of IFRS resulted an increase in the 2004 results of euro 199 million, because the higher prices. 4. Different criteria of capitalization of financial charges Under Italian GAAP financial charges are capitalized when incurred within the amount not financed by internally-generated funds or contribution by third parties. Under IFRS, when a relevant time interval is necessary until the capital asset is ready for use, finance charges can be capitalized as an increase of the asset book value for the amount of financial charges that could have been saved if capital expenditures had not been made. The application of this principle determined an increase in the book value of fixed assets of euro 615 million with a corresponding entry to shareholders equity (euro 394 million) and to deferred tax liabilities (euro 221 million). The adoption of IFRS determined a decrease in 2004 results of euro 3 million (the effect of higher amortization was partially offset by the increase of financial charges capitalized). 5. Different recognition of the reserve for contingencies Under Italian GAAP the reserve for contingencies concerns costs and charges of a determined nature, whose existence is certain or probable, but whose amounts or occurrence are not determinable at the period-end. The reserve for contingencies is stated on an undiscounted basis.

| (4) | In particular
article 1 paragraph 61 states: holders of natural
gas underground storage concessions are entitled to no
more than two renewals, each lasting ten years, on
condition that such persons carry out storage programs
and all other obligations arising from the
concession. Previous Law No. 170/1970 stated:
concessions can be renewed for ten years
periods. |
| --- | --- |
| (5) | Of which euro
30 million concern gas stored, recorded in fixed assets. |

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Under IFRS a provision is made only if there is a current obligation considered probable as a consequence of events occurred before period-end deriving from legal or contractual obligations or from behaviors or announcements of the company that determine valid expectations in third parties (implicit obligations), provided that the amount of the liability can be reasonably determined. When the financial effect of time is significant and the date of the expense to clear the relevant obligation can be reasonably determined, the estimated cost is discounted on the basis of the risk-free rate of interest and adjusted for the Companys credit cost. As for the provision to the reserve for redundancy incentives, IFRS require the preparation of a detailed formalized restructuring plan, indicating at least the activities, locations, categories and approximate number of employees affected by the restructuring. The plan must have commenced or be properly communicated to the parties involved before period-end, generating the expectation that the company will carry out the plan. As for provision for catastrophic risks, Padana Assicurazioni SpA, in application of rules imposed by the Minister of Industry on 15 June 1984, makes integrative provisions for the risk of earthquakes, seaquakes, volcanic eruptions and similar events. These integrative provisions are not allowed by IFRS in absence of a current obligation. No provision is made for periodic maintenance under IFRS. These costs are capitalized when incurred as a separate component of the asset and are depreciated according to their useful lives, as they do not represent a current obligation. As a consequence of the absence of a current obligation, the application of this principle determined a reversal of the reserve for contingencies of euro 327 million with a corresponding entry to shareholders equity (euro 269 million), to deferred tax liabilities (euro 36 million) and to a decrease in other assets (euro 22 million) referred to the portion of re-insured risks. The adoption of IFRS determined an increase in 2004 results of euro 31 million. 6. Effect of the capitalization of costs for asset retirement obligations Under Italian GAAP, site restoration and abandonment costs are allocated annually in a specific reserve so that the ratio of the allocations made and the amount of estimated costs equals the percentage of depreciation of the relevant asset. In particular in the Exploration & Production segment, the costs estimated to be incurred at the end of production activities for the site abandonment and restoration are accrued so that the ratio of the reserve and the amount of estimated costs correspond to the ratio of cumulative production at period-end and proved developed reserves at period-end plus cumulative production. Under IFRS, estimated site restoration and abandonment costs are recorded in a specific reserve with a corresponding entry to the relevant asset; when the financial effect of time is relevant, the estimated cost is recorded considering the present value of the costs to be incurred calculated using a rate representative of the Companys credit cost. The cost assigned to the different relevant components of the asset is recognized in profit and loss account through the amortization process. The reserve, and consequently the assets book value, is periodically adjusted to reflect the changes in the estimates of the costs, of the timing and of the discount rate. The application of this principle determined an increase in fixed assets of euro 254 million, in shareholders equity of euro 152 million and in deferred tax liabilities of euro 158 million, and a decrease in site abandonment and restoration reserve of euro 56 million. The adoption of IFRS determined an increase in 2004 results of euro 63 million. 7. Underlifting In the Exploration & Production segment joint venture agreements regulate, among other things, the right of each partner to withdraw its own share of production volumes available in the period. Higher production volumes withdrawn as compared to net working interest volume determine the recognition of a credit by a partner who has withdrawn lower production volumes as compared to its net working interest volume. Under Italian GAAP, this credit is evaluated on the basis of production costs; under IFRS it is evaluated at current prices at period end. The application of this principle determined an increase in other assets of euro 78 million with a corresponding entry to shareholders equity (euro 61 million) and to deferred tax liabilities (euro 17 million). The adoption of IFRS determined an increase in 2004 results of euro 33 million. 8. Write-off of the difference between nominal and present value of deferred taxation in business combinations Under Italian GAAP the difference between the present value of deferred taxes included in the determination of the fair value of net assets acquired as part of a business combination and related deferred tax liabilities recognized at nominal value (difference) is recognized under the item accrued assets. Under IFRS this difference is recognized under Goodwill; however, in the event of the first application goodwill can be adjusted only in case of specific circumstances that do not occur in this case. This difference is therefore written off because it cannot be considered an asset under IFRS.

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The application of this principle determined a decrease in shareholders equity of euro 514 million with a corresponding entry to deferred tax assets. The adoption of IFRS determined an increase in 2004 results of euro 38 million. 9. Adjustment of tangible and intangible assets The decrease in shareholders equity of euro 189 million related in particular to the following aspects. 9.1 INTANGIBLE ASSETS Under Italian GAAP costs for extraordinary company transactions, costs for the start-up or expansion of production activities and costs for the establishment of a company or for issuance of capital stock can be capitalized. IFRS require these costs to be charged against profit and loss account, except for establishment and issuance of capital stock of the parent company that are recognized as a decrease in shareholders equity net of the relevant fiscal effect. Under Italian GAAP costs for software development can be capitalized under certain circumstances. IFRS pose more stringent conditions for their capitalization. The application of these principles determined the write-off of intangible assets for euro 114 million with a corresponding entry to a decrease in shareholders equity (euro 81 million) and the recognition of deferred tax assets (euro 33 million). The adoption of IFRS determined an increase in 2004 results of euro 33 million. 9.2 REVALUATION OF ASSETS Under Italian GAAP revaluation of tangible assets is allowed under specific law provisions within the limit of their recovery value. IFRS prohibit this kind of tangible asset revaluation. The application of this principle determined a decrease in tangible assets of euro 75 million with a corresponding entry to a decrease in shareholders equity (euro 54 million) and the recognition of deferred tax assets (euro 21 million). The decrease in fixed assets takes into account the restatement of gains/losses on disposal on the basis of the historical cost and the recalculation of amortization until 31 December 2003. The adoption of IFRS determined an increase in 2004 results of euro 5 million. 9.3 PRE-DEVELOPMENT COSTS Under Italian GAAP costs related to preliminary studies, researches and surveys aimed at testing different options for development of hydrocarbon fields are recognized under tangible assets. Under IFRS these costs are considered exploration costs and are expensed when incurred. The application of this principle determined the write-off of capitalized pre-development costs for euro 71 million with a corresponding entry to a decrease in shareholders equity (euro 54 million) and the recognition of deferred tax liabilities (euro 17 million). The adoption of IFRS determined an increase in 2004 results of euro 1 million. 10. Employee benefits Under Italian GAAP employee termination benefits are accrued during the period of employment of employees, in accordance with the law and applicable collective labor contracts. Under IFRS employee termination benefits (e.g. pension payments, life insurance payments, medical assistance after retirement, etc.) are defined on the basis of post employment benefit plans that due to their mechanisms feature defined contributions plans or defined benefit plans. In the first case, the companys obligation consists in making payments to the state or to a trust or a fund. Plans with defined benefits are pension, insurance or healthcare plans which provide for the companys obligation, also in the form of implicit obligation (see item 5), to provide non formalized benefits to its former employees 6 . The related discounted charges, determined with actuarial assumptions 7 , are accrued annually on the basis of the employment periods required for the granting of such benefits.

| (6) | Given the
uncertainties related to their payment date, employee
termination indemnities are considered as a defined
benefit plan. |
| --- | --- |
| (7) | Actuarial
assumptions concern, among other things, the following
variables: (i) level of future salaries; (ii) death rates
of employees; (iii) turn-over rate of employees; (iv)
share of participants with successors entitled to
benefits (e.g. spouses and children); (v) for medical
assistance plans, frequency of requests for reimbursement
and future changes in medical costs; (vi) interest rates. |

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The application of this principle determined a decrease in shareholders equity of euro 92 million, the recognition of deferred tax assets (euro 54 million) with a corresponding entry to an increase in the reserve for contingent losses of euro 146 million, referred in particular to charges for medical assistance granted upon termination and to pension plans outside Italy. The adoption of IFRS determined an increase in 2004 results of euro 8 million. 11. Effects on investments accounted for under the equity method Joint ventures and affiliates are accounted for under the equity method. The application of IFRS to the initial balance at 1 January 2004 of assets and liabilities of these companies determined a decrease in investments of euro 43 million with a corresponding entry to shareholders equity. The adoption of IFRS determined an increase in 2004 results of euro 126 million, essentially related to the elimination of the amortization of goodwill (see item 12.2). 12. Other changes in 2004 result under IFRS The decrease in 2004 results of euro 109 million related in particular to the following aspects. 12.1 ADJUSTMENT ON GAIN FROM SALE OF A 9.054% INTEREST IN SNAM RETE GAS Due to the application of IFRS, net shareholders equity to be compared with the sale price for determining the gain on the sale of a 9.054% interest in Snam Rete Gas SpA carried out in 2004 increased by euro 2,335 million related essentially to an increase in the book value of natural gas pipelines (see item 1) and deferred tax assets (see item 2.1). The adoption of IFRS determined a decrease in 2004 results of euro 211 million. 12.2 AMORTIZATION OF GOODWILL Under Italian GAAP goodwill is amortized on a straight-line basis in the periods of its expected utilization, provided it is no longer than five years; in case of specific conditions related to the kind of company the goodwill refers to, goodwill can be amortized for a longer period not exceeding 20 years. Under IFRS goodwill cannot be amortized, but it is subject to a yearly evaluation in order to define the relevant impairment, if needed. The adoption of IFRS determined an increase in 2004 results of euro 102 million.

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Balance sheet

(million euro) Note 31.12.2004 31.12.2005

ASSETS
Current assets
Cash and
cash equivalent	1	1,003		1,333
Other financial assets for trading or held for
sale	2	1,266		1,368
Trade and
other receivables	3	13,734		17,902
Inventories	4	2,847		3,563
Income tax
receivables	5	674		697
Other current assets	6	588		369
Total
current assets		20,112		25,232
Non-current assets
Property,
plant and equipment	7	40,586		45,013
Inventories - compulsory stock	8	1,386		2,194
Intangible
assets	9	3,313		3,194
Investments accounted for using the equity
method	10	3,156		3,890
Other
investments	10	529		421
Other financial assets	11	936		1,050
Deferred
tax assets	12	1,827		1,861
Other non-current assets	13	1,008		995
Total
non-current assets		52,741		58,618
TOTAL ASSETS		72,853		83,850
LIABILITIES
AND SHAREHOLDERS EQUITY
Current liabilities
Current
financial liabilities	14	4,150		4,612
Current portion of long-term debt	18	927		733
Trade and
other payables	15	10,533		13,095
Taxes payable	16	2,498		3,430
Other
current liabilities	17	505		613
Total current liabilities		18,613		22,483
Non-current
liabilities
Long-term debt	18	7,607		7,653
Reserves
for contingencies and charges	19	5,736		7,679
Provisions for employee benefits	20	982		1,031
Deferred
tax liabilities	21	3,948		4,890
Other non-current liabilities	22	427		897
Total
non-current liabilities		18,700		22,150
TOTAL LIABILITIES		37,313		44,633
SHAREHOLDERS
EQUITY	23
Minority interests		3,166		2,349
Eni
shareholders equity:
Share capital: 4,005,358,876 fully paid shares
nominal value euro 1 each (4,004,424,476 shares at 31
December 2004)		4,004		4,005
Share
premium
Other reserves		9,629		10,893
Retained
earnings		14,911		17,398
Net profit		7,059		8,788
Treasury
shares		(3,229	)	(4,216	)
Total Eni shareholders equity		32,374		36,868
TOTAL
SHAREHOLDERS EQUITY		35,540		39,217
TOTAL LIABILITIES AND SHAREHOLDERS
EQUITY		72,853		83,850

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Profit and loss account

(million euro) Note 2004 2005

| REVENUES — Net sales
from operations | 25 | 57,545 | | 73,728 | |
| --- | --- | --- | --- | --- | --- |
| Other income and revenues | | 1,377 | | 798 | |
| TOTAL
REVENUES | | 58,922 | | 74,526 | |
| Operating expenses | 26 | | | | |
| Purchases,
services and other | | 38,347 | | 48,567 | |
| Payroll and related costs | | 3,245 | | 3,351 | |
| Depreciation,
amortization and impairments | | 4,931 | | 5,781 | |
| Operating profit | | 12,399 | | 16,827 | |
| Financial
income (expense) | 27 | | | | |
| Financial income | | 2,589 | | 3,131 | |
| Financial
expense | | (2,745 | ) | (3,497 | ) |
| | | (156 | ) | (366 | ) |
| Income
(expense) from investments | 28 | | | | |
| Effects of investments accounted for using the
equity method | | 332 | | 737 | |
| Other
income (expense) from investments | | 488 | | 177 | |
| | | 820 | | 914 | |
| Profit
before income taxes | | 13,063 | | 17,375 | |
| Income taxes | 29 | (5,522 | ) | (8,128 | ) |
| Net
profit | | 7,541 | | 9,247 | |
| Pertaining to: | | | | | |
| - Eni | | 7,059 | | 8,788 | |
| - minority interest | | 482 | | 459 | |
| | | 7,541 | | 9,247 | |
| Earnings per share pertaining to Eni (euro
per share) | 30 | | | | |
| - basic | | 1.87 | | 2.34 | |
| - diluted | | 1.87 | | 2.34 | |

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Statement of changes in shareholders equity

Eni shareholders equity

(million euro) Share capital Legal reserve of Eni SpA Reserve for treasury shares Other reserves Cumulative translation adjustment reserve Treasury shares Retained earnings Interim dividend Net profit for the period Total Minority interests Total shareholders equity

Balance at 31 December 2003	4,003	959	5,397		3,200		)	(3,164	)	13,221			26,696		1,622		28,318
Changes in accounting principles										2,234			2,234		965		3,199
Annulment
of exchanges differences						2,505				(2,505	)
Adjusted balance at 1 January 2004	4,003	959	5,397		3,200			(3,164	)	12,950	5,585		28,930		2,587		31,517
Net
profit for the year											7,059		7,059		482		7,541
Net income (expense) recognized directly in
equity
Exchange
differences from translation of financial statements
denominated in currencies other than euro						(750	)						(750	)	1		(749	)
						(750	)						(750	)	1		(749	)
Total
(expense) income for the period						(750	)				7,059		6,309		483		6,792
Transactions with shareholders
Dividend
distribution of Eni SpA (euro 0.75 per share)											(2,828	)	(2,828	)			(2,828	)
Dividend distribution of other companies															(248	)	(248	)
Allocation
of 2003 net profit					22					2,735	(2,757	)
Shares repurchased								(70	)				(70	)			(70	)
Shares
issued under stock grant plans	1				(1	)
Treasury shares sold under incentive plans for
Eni managers			(5	)	5			5					5				5
	1		(5	)	26			(65	)	2,735	(5,585	)	(2,893	)	(248	)	(3,141	)
Other changes in shareholders equity
Cost of
stock option					3								3				3
Former Italgas SpA reserves reconstituted					(43	)				43
Reserves
from merger of EniData SpA					4					(4	)
Reclassification					775					(775	)
Sale of
9.054% of Snam Rete Gas SpA share capital													326		326
Exchange differences arising on the distribution
of dividends and other changes						63				(38	)		25		18		43
					739	63				(774	)		28		344		372
Balance at 31 December 2004	4,004	959	5,392		3,965	(687	)	(3,229	)	14,911	7,059		32,374		3,166		35,540

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Statement of changes in shareholders equity (continued)

Eni shareholders equity

Balance at 31 December 2004	4,004	959	5,392		3,965		)	(3,229	)	14,911			7,059		32,374		3,166		35,540
Changes in
accounting principles (IAS 32 and 39)					13					(40	)				(27	)	12		(15	)
Adjusted balance at 1 January 2005	4,004	959	5,392		3,978	(687	)	(3,229	)	14,871			7,059		32,347		3,178		35,525
Net
profit for the year													8,788		8,788		459		9,247
Net income (expense) recognized directly in
equity
Variation
of the fair value of financial assets for trading					6										6				6
Variation of the fair value of cash flow hedge
derivative contracts					16										16				16
Exchange
differences from translation of financial statements
denominated in currencies other than euro						1,497									1,497		15		1,512
					22	1,497									1,519		15		1,534
Total
(expense) income for the period					22	1,497							8,788		10,307		474		10,781
Transactions with shareholders
Dividend
distribution of Eni SpA (euro 0.90 per share)													(3,384	)	(3,384	)			(3,384	)
Interim dividend (euro 0.45 per share)											(1,686	)			(1,686	)			(1,686	)
Dividend
distribution of other companies																	(1,218	)	(1,218	)
Allocation of 2004 net profit					1,300					2,375			(3,675	)
Shares
repurchased								(1,034	)						(1,034	)			(1,034	)
Shares issued under stock grant plans	1				(1	)
Treasury
shares sold under incentive plans for Eni managers			(47	)	47			47							47				47
	1		(47	)	1,346			(987	)	2,375	(1,686	)	(7,059	)	(6,057	)	(1,218	)	(7,275	)
Other
changes in shareholders equity
Cost of stock option					5										5				5
Sale of
consolidated companies																	(40	)	(40	)
Exchange differences arising on the distribution
of dividends and other changes						131				135					266		(45	)	221
					5	131				135					271		(85	)	186
Balance at 31 December 2005	4,005	959	5,345		5,351	941		(4,216	)	17,381	(1,686	)	8,788		36,868		2,349		39,217

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Statement of cash flows

(million euro) 2004 2005

Cash flow from operating activities — Net profit	7,541		9,247
Depreciation and amortization	4,598		5,509
Writedowns
(revaluations), net	27		(288	)
Net change in reserves for contingencies	418		1,279
Net change
in the reserve for employee benefits	49		18
Gain on disposal of assets, net	(793	)	(220	)
Dividend
income	(72	)	(33	)
Interest income	(198	)	(214	)
Interest
expense	567		654
Exchange differences	(79	)	(64	)
Current
and deferred income taxes	5,522		8,128
Cash generated from operating profit before
changes in working capital	17,580		24,016
(Increase)
decrease:
- inventories	(355	)	(1,402	)
- accounts
receivable	(1,241	)	(4,413	)
- other assets	43		351
- trade
and other accounts payable	727		3,030
- other liabilities	(83	)	12
Cash
from operations	16,671		21,594
Dividends received	394		366
Interest
received	167		214
Interest paid	(533	)	(619	)
Income
taxes paid	(4,199	)	(6,619	)
Net cash provided from operating activities	12,500		14,936
Cash
flow from investing activities
Investments:	(714	)	(856	)
-
intangible assets	(6,785	)	(6,558	)
- tangible assets			(73	)
-
consolidated subsidiaries and businesses	(316	)	(54	)
- investments	(675	)	(464	)
-
securities	(470	)	(683	)
- financing receivables
- change
in accounts payable and receivable in relation to
investments and capitalized depreciation	(13	)	149
Cash flow from investments	(8,973	)	(8,539	)
Disposals:
- intangible assets	13		13
- tangible
assets	279		99
- consolidated subsidiaries and businesses	538		252
-
investments	61		178
- securities	659		369
-
financing receivables	808		804
- change in accounts receivable in relation to
disposals	(1	)	9
Cash
flow from disposals	2,357		1,724
Net cash used in investing activities (*)	(6,616	)	(6,815	)

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(million euro) 2004 2005

| Proceeds
from long-term debt — Payments of long-term debt | 1,229 — (797 | ) | 2,755 — (2,978 | ) |
| --- | --- | --- | --- | --- |
| Reductions
of short-term debt | (4,175 | ) | (317 | ) |
| | (3,743 | ) | (540 | ) |
| Payments
by/to minority shareholders | 1 | | 24 | |
| Sale (acquisition) of additional interests in
subsidiaries | 621 | | (33 | ) |
| Dividends
to minority shareholders | (3,076 | ) | (6,288 | ) |
| Shares repurchased | (65 | ) | (987 | ) |
| Net
cash used in financing activities | (6,262 | ) | (7,824 | ) |
| Effect of change in consolidation area | 12 | | (38 | ) |
| Effect
of exchange differences | (67 | ) | 71 | |
| Net cash flow for the period | (433 | ) | 330 | |
| Cash
and cash equivalent at beginning of the year | 1,436 | | 1,003 | |
| Cash and cash equivalent at end of the year | 1,003 | | 1,333 | |

(*) Net cash used in investing activities includes some investments which Eni, due to their nature (i.e. temporary cash investments, securities held purely for investment purposes, etc.) considers as a reduction of net borrowings as defined in the Financial Review in the Report of the Directors. Cash flow of such investments are as follows:

(million euro) 2004 2005

| Financing investments: — -
securities | (38 | ) | (186 | ) |
| --- | --- | --- | --- | --- |
| - financing receivables | (15 | ) | (45 | ) |
| | (53 | ) | (231 | ) |
| Disposal of financing investments: | | | | |
| -
securities | 26 | | 60 | |
| - financing receivables | 238 | | 62 | |
| | 264 | | 122 | |
| Cash flows from financing activities | 211 | | (109 | ) |

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SUPPLEMENTAL INFORMATION

(million euro) 2004 2005

| Effect of investment of consolidated
subsidiaries and businesses — Non-current
assets | | | 122 | |
| --- | --- | --- | --- | --- |
| Net borrowings | | | (19 | ) |
| Current
and non-current liabilities | | | (22 | ) |
| Net effect of investment | | | 81 | |
| Fair value
of the participations held before the acquisition of
control | | | (8 | ) |
| Purchase price | | | 73 | |
| Cash
flow on investment | | | 73 | |
| Effect of disposal of consolidated
subsidiaries and businesses | | | | |
| Current
assets | 261 | | 204 | |
| Non-current assets | 285 | | 189 | |
| Net
borrowings | (138 | ) | 42 | |
| Current and non-current liabilities | (167 | ) | (217 | ) |
| Exchange
rate differences realized following disposal | 45 | | | |
| Net effect of disposal | 286 | | 218 | |
| Gain on
disposal | 304 | | 140 | |
| Minority interest | | | (43 | ) |
| Selling
price | 590 | | 315 | |
| less: | | | | |
| Cash
and cash equivalent | (52 | ) | (63 | ) |
| Cash flow on disposal | 538 | | 252 | |

Transactions that did not produce cash flows In the 2005 an acquisition of an investment throught a conferral of a business for euro 18 million.

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Basis of presentation In application of EC Regulation 1606/2002 approved by the European Parliament and Council on 19 July 2002, starting from 2005 companies with securities listed on a regulated stock market of a Member State of the European Union are required to prepare their consolidated financial statements in accordance with International Financial Reporting Standards (IFRS), as approved by the European Commission. The consolidated financial statements of Eni have been prepared in accordance with IFRS issued by the International Accounting Standards Board (IASB) and adopted by the European Commission following the procedure contained in article 6 of the EC Regulation No. 1606/2002 of the European Parliament and Council of 19 July 2002. For hydrocarbon exploration and production, accounting policies followed at an international level have been applied, with particular reference to amortization according to the Unit-Of-Production method, buy-back contracts and Production sharing Agreements 8 . The consolidated financial statements include the statutory accounts of Eni SpA and of all Italian and foreign companies on which Eni SpA holds the right to directly or indirectly exercise control, determining financial and management decisions, and obtain economic and financial benefits. Insignificant subsidiaries are not included in the scope of consolidation. A subsidiary is considered insignificant when it does not exceed two of these limits: (i) total assets or liabilities: euro 3,125 thousand; (ii) total revenues: euro 6,250 thousand; (iii) average number of employees: 50 units. Moreover, companies, for which the consolidation does not produce significant economic and financial effects, are not included in the scope of consolidation. Such companies generally represent subsidiaries that work on account of other companies as the sole operator in the management of upstream oil contracts; these companies are financed on a proportional basis according to budgets approved, by the companies involved in the project, to which the company periodically reports costs and receipts deriving from the contract. Costs and revenues and other operating data (production, reserves, etc.) of the project, as well as the obligations arising from the project, are recognized proportionally in the financial statements of the companies involved. The effects of these exclusions are not material 9 . Subsidiaries excluded from consolidation, joint ventures, affiliated companies and other interests are accounted for as described below under the heading Financial fixed assets. Financial statements of consolidated companies are audited by auditing companies that examine and certify the information required to be disclosed when preparing the consolidated financial statement. Considering their materiality, amounts are stated in millions of euro. Principles of consolidation Interests in companies included in the scope of consolidation Assets and liabilities, expense and income related to fully consolidated companies are wholly incorporated into the consolidated financial statements; the book value of these interests is eliminated against the corresponding fraction of the shareholders equity of the companies owned, attributing to each item of the balance sheet the current value at the date of acquisition of control. Any positive residual difference as regard to the acquisition cost is recognized as Goodwill. Negative residual differences are charged against the profit and loss account. Gains or losses on the sale of shares in consolidated subsidiaries are recorded in the profit and loss account for the amount corresponding to the difference between proceeds from the sale and the divested portion of net equity sold. Fractions of shareholders equity and of net profit of minority interest are recognized under specific items in the profit and loss account. Minority interest is determined based on the current value attributed to assets and liabilities at the date of the acquisition of control, excluding any related goodwill.

| (8) | International
accounting principles do not establish specific criteria
for hydrocarbon exploration and production activities.
Eni continued to use the existing accounting policies for
exploration and evaluation assets previously applied
before the introduction of IFRS, as permitted by IFRS 6
Exploration for and evaluation of mineral
resources. |
| --- | --- |
| (9) | According to
the requirements of the Framework of international
accounting standards, Information is material if its
omission or misstatement could influence the economic
decisions that users make on the basis of the financial
statements. |

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Inter-company transactions Income deriving from inter-company transactions unrealized towards third parties is eliminated. Receivables, payables, revenues and costs, guarantees, commitments and risks among consolidated companies are eliminated, as well. Inter-company losses are not eliminated, since they reflect an actual decrease in the value of divested assets. Foreign currency translation Financial statements of consolidated companies denominated in currencies other than the euro are converted into euro applying exchange rates prevailing at year-end to assets and liabilities, the historical exchange rates to equity accounts and the average rates for the period to profit and loss account (source: Ufficio Italiano Cambi). Exchange rate differences from the conversion deriving from the application of different exchange rates for assets and liabilities, shareholders equity and profit and loss account are recognized under the item Other reserves within shareholders equity for the portion relating to the Group and under the item Minority interest for the portion related to minority shareholders. Financial statements of foreign subsidiaries which are translated into euro are denominated in the functional currencies of the country where the enterprise operates. Evaluation criteria The most significant evaluation criteria used for the preparation of the consolidated financial statements are shown below. Current assets Financial assets held for trading and financial assets available for sale are stated at fair value and the economic effects are charged, to the profit and loss account item Financial Income (Expense) and under shareholders equity within Other reserves. The fair value of financial instruments is represented by market quotations or, in their absence, by the value resulting from the adoption of suitable financial valuation models which take into account all the factors adopted by the market operators and the prices obtained in similar actual transactions in the market. When the conditions for the purchase or sale of financial assets provide for the settlement of the transaction and the delivery of the assets within a given number of days determined by entities controlling the market or by agreements (e.g. purchase of securities on regulated markets), the transaction is entered at the date of settlement. Receivables are stated at their amortized cost (see below Financial fixed assets). Transferred financial assets are eliminated when the transaction, together with the cash flows deriving from it, lead to the substantial transfer of all risks and benefits associated to the property. Inventories, excluding contract work in progress and including compulsory stocks, are stated at the lower of purchase or production cost and market value represented by the proceeds the company expects to collect from the sale of the inventories in the normal course of business. The cost for inventories of hydrocarbons (crude oil, condensates and natural gas) and petroleum products is determined by applying the weighted-average cost method on a three-month basis; the cost for inventories of the Petrochemical segment is determined by applying the weighted-average cost on an annual basis. Contract work in progress is recorded on the basis of contractual considerations by reference to the stage of completion of a contract measured on a cost-to-cost basis. Advances are deducted from inventories within the limits of contractual considerations; any excess of such advances over the value of the work performed is recorded as a liability. Losses related to construction contracts are accrued for as soon as the company becomes aware of such losses. Contract work in progress not yet invoiced, whose payment is agreed in a foreign currency, is translated to euro using the current exchange rates at year-end and effects are reflected in the profit and loss account. Hedging instruments are described in the section Derivative Instruments.

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Non-current assets Property, plant and equipment 10 Tangible assets, including investment properties, are recognized using the cost model and stated at their purchase or production cost including ancillary costs which can be directly attributed to them as are required to make the asset ready for use. In addition, when a substantial amount of time is required to make the asset ready for use, the purchase price or production cost includes the financial expenses incurred that would have theoretically been saved had the investment not been made. In the case of current obligations for the dismantling and removal of assets and the reclamation of sites, the carrying value includes, with a corresponding entry to a specific reserve, the estimated (discounted) costs to be borne at the moment the asset is retired. Revisions of estimates for these provisions, for the passage of time and for changes in the discount rate are recognized under Reserves for contingencies. No revaluation is made even in application of specific laws. Assets carried under financial leasing are included within the tangible assets, with a corresponding entry to the financial payable to the lessor, and depreciated using the criteria detailed below. When the renewal is not reasonably certain, assets carried under financial leasing are depreciated over the period of the lease if shorter than the useful life of the asset. Tangible assets are depreciated systematically over the duration of their useful life taken as an estimate of the period for which the assets will be used by the company. When the tangible asset comprises more than one significant element with different useful lives, the depreciation is carried out for each component. The amount to be depreciated is represented by the book value reduced by the presumable net realizable value at the end of the useful life, if it is significant and can be reasonably determined. Land is not depreciated, even if bought together with a building. Tangible assets held for sales are not depreciated but are valued at the lower of the book value and fair value less costs of disposal. Assets that can be used free of charge are depreciated over the shorter of the duration of the concession and the useful life of the asset. Renewals, improvements and transformations which extend asset lives are capitalized. The costs for the substitution of identifiable components in complex assets are capitalized and depreciated over their useful life; the residual book value of the component that has been substituted is charged to the profit and loss account. Ordinary maintenance and repair costs are expensed when incurred. When events occur that lead to a presumable reduction in the book value of tangible assets, their recoverability is checked by comparing their book value with the realizable value, represented by the greater of fair value less costs of disposal and replacement cost. In the absence of a binding sales agreement, fair value is estimated on the basis of market values, of recent transactions, or of the best available information that shows the proceeds that the company could reasonably expect to collect from the disposal of asset. Replacement cost is determined by discounting the expected cash flows deriving from the use of the asset and, if significant and reasonably determinable, the cash flows deriving from its disposal at the end of its useful life, net of disposal costs. Cash flows are determined on the basis of reasonable and documented assumptions that represent the best estimate of the future economic conditions during the remaining useful life of the asset, giving more importance to independent assumptions. The discounting is carried out at a rate that takes into account the implicit risk in the sectors where the entity operates. Valuation is carried out for each single asset or, if the realizable value of a single assets cannot be determined, for the smallest identifiable group of assets that generates independent cash inflows from their continuous use, so called cash generating unit. When the reasons for their impairment cease to exist, Eni reverses previously recorded impairment charges and records an income as asset revaluation in the profit and loss account of the relevant year. This asset revaluation is the lower of the fair value and the book value increased by the amount of previously incurred impairments net of related amortization that would have been made had the impairment not been made. Intangible assets Intangible assets include assets which lack physical consistence that are identifiable, controlled by the company and able to produce future economic benefits, and goodwill acquired in business combinations. An asset is identifiable to distinguish it clearly from goodwill. This condition is normally met when: (i) the intangible asset can be traced back to a legal or contractual right, or (ii) the asset is separable, i.e. can be sold, transferred, licensed, rented or exchanged, either individually or as an integral part of other assets. An entity controls an asset if it has the power to obtain the future economic benefits flowing from the underlying resource and to restrict the access of others to those benefits.

(10) Recognition and evaluation criteria of exploration and production activities are described in the section Exploration and production activities below.

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Intangible assets are stated at cost as determined with the criteria used for tangible assets. No revaluation is made even in application of specific laws. Intangible assets with a defined useful life are amortized systematically over the duration of their useful life taken as an estimate of the period for which the assets will be used by the company; the recoverability of their book value is checked using the criteria described in the section Tangible Assets. Goodwill and other intangible assets with an indefinite useful life are not amortized. The recoverability of their carrying value is checked at least annually and whenever events or changes in circumstances indicate that the carrying value may not be recoverable. With reference to goodwill, this check is performed at the level of the smallest aggregate on which the company, directly or indirectly, evaluates the return on the capital expenditure that included said goodwill. Impairment charges against goodwill may not be revalued. Costs of technological development activities are capitalized when: (i) the cost attributable to the intangible asset can be reasonably determined; (ii) there is the intention, the availability of funding and the technical capacity to make the asset available for use or sale; (iii) it can be shown that the asset is able to produce future economic benefits. Exploration and production activities ACQUISITION OF MINERAL RIGHTS Costs associated with the acquisition of mineral rights are capitalized in connection with the assets acquired (exploratory potential, probable and possible reserves, proved reserves). When the acquisition is related to a set of exploratory potential and reserves, the cost is allocated to the different assets acquired on the basis of the value of the relevant discounted cash flow. Expenditure for the exploratory potential, represented by the costs for the acquisition of the exploration permits and for the extension of existing permits, is recognized under Intangible assets and is amortized on a straight-line basis over the period of the exploration as contractually established. If the exploration is abandoned, the residual expenditure is charged to the profit and loss account. Acquisition costs for proved reserves and for possible and probable reserves are recognized under Intangible assets or Tangible assets depending on the nature of the underlying assets. Costs associated with proved reserves are amortized on a Unit-Of-Production (UOP) basis, as detailed in the section Development, considering both developed and undeveloped reserves. Expenditures associated with possible and probable reserves are not amortized until classified as proved reserves; in case of negative result the costs are charged to the profit and loss account. EXPLORATION Costs associated with exploratory activities for oil and gas producing properties incurred both before and after the acquisition of mineral rights (such as acquisition of seismic data from third parties, test wells and geophysical surveys) are capitalized, to reflect their nature of investment, and amortized in full when incurred. DEVELOPMENT Development costs are those costs incurred to obtain access to proved reserves and to provide facilities for extracting, gathering and storing oil and gas and are capitalized and amortized generally on a UOP basis, as their useful life is closely related to the availability of feasible reserves. This method provides for residual costs to be amortized through a rate representing the ratio between the volumes extracted during the period and the proved developed reserves existing at the end of the period, increased by the volumes extracted during the period. This method is applied with reference to the smallest aggregate representing a direct correlation between investment and proved developed reserves. Costs related to unsuccessful development wells or damaged wells are expensed immediately as loss on disposal. Impairments and revaluations of development costs are made on the same basis as those for tangible assets. PRODUCTION Production costs are costs to operate and maintain wells and field equipment and are expensed as incurred. PRODUCTION SHARING AGREEMENTS AND BUY-BACK CONTRACTS Revenues and reserves related to production sharing agreements and buy-back contracts are settled on the basis of contractual clauses related to the repayment of costs incurred following the exploration, development and operating activities (cost oil) and to the relevant amount of realized productions (profit oil).

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RETIREMENT Costs expected to be incurred with respect to the retirement of the well, including costs associated with removal of production facilities, dismantlement and site restoration, are capitalized and amortized on a Unit-of-Production basis, consistent with the policy described under tangible assets. Grants Grants are recorded in a contra asset account when authorized, if all the required conditions have been met and as a reduction of purchase price or production cost of the relevant assets. Grants of the year are recognized in the profit and loss account. Financial fixed assets INVESTMENTS Investments in subsidiaries excluded from consolidation, joint ventures and affiliates are accounted for using the equity method. If it does not result in a misrepresentation of the companys financial condition and consolidated results, subsidiaries, joint ventures and affiliates excluded from consolidation may be accounted for at cost, adjusted for permanent impairment of value. When the reasons for their impairment cease to exist, investments accounted for at cost are revalued within the limit of the impairment made and their effects are charged to the profit and loss account item Other income (expense) from investments. Other investments are recognized at their fair value and their effects are included in shareholders equity under Other reserves. When fair value cannot be reasonably ascertained, investments are accounted for at cost, adjusted for permanent impairment of value; impairment of value may not be revalued. The risk deriving from losses exceeding shareholders equity is recognized in a specific reserve to the extent the parent company is required to fulfill legal or implicit obligations towards the subsidiary or to cover its losses. RECEIVABLES AND FINANCIAL ASSETS TO BE HELD TO MATURITY Receivables and financial assets that must be held to maturity are stated at cost represented by the fair value of the initial exchanged amount adjusted to take into account direct external costs related to the transaction (e.g. fees of agents or consultants, etc.). The initial carrying value is then corrected to take into account capital repayments, devaluations and amortization of the difference between the reimbursement value and the initial carrying value; amortization is carried out on the basis of the effective internal rate of return represented by the rate that equalizes, at the moment of the initial revaluation, the current value of expected cash flows to the initial carrying value (so-called amortized cost method). The economic effects of the valuation according to the amortized cost method are charged as Financial income (expense). Financial liabilities Debt is carried at amortized cost (see item Financial fixed assets above). Provisions for contingencies Provisions for contingencies concern risks and charges of a definite nature and whose existence is certain or probable but for which at year-end the amount or date of occurrence remains uncertain. Provisions are made when: (i) it is probable the existence of a current obligation, either legal or implicit, deriving from a past event; (ii) it is probable that the fulfillment of that obligation will be expensive; (iii) the amount of the obligation can be accurately estimated. Provisions are stated at the value that represents the best estimate of the amount that the company would reasonably pay to fulfill the obligation or to transfer it to third parties at year-end. When the financial effect of time is significant and the payment date of the obligations can be reasonably estimated, the provisions are discounted back at the companys average rate of indebtedness. The increase in the provision due to the passing of time is charged to the profit and loss account in the item Financial Income (Expense). When the liability regards a tangible asset (e.g. site restoration and abandonment), the provision is stated with a corresponding entry to the asset to which it refers; profit and loss account charge is made with the amortization process. The costs that the company expects to bear to carry out restructuring plans are recognized in the year in which the company formally defines the plan and the interested parties have developed the reasonable expectation that the restructuring will happen. The provisions are periodically updated to show the variations of estimates of costs, production times and actuarial rates; the estimated revisions to the provisions are recognized in the same profit and loss account item that had previously held the provision, or, when the liability regards tangible assets (i.e. site restoration and abandonment) with a corresponding entry to the assets to which they refer.

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In the Notes to the Financial Statements the following potential liabilities are described: (i) possible, but not probable obligations deriving from past events, whose existence will be confirmed only when one or more future events beyond the companys control occur; (ii) current obligations deriving from past events whose amount cannot be reasonably estimated or whose fulfillment will probably be not expensive. Employee post-employment benefits Post employment benefit plans are defined on the basis of plans, even if not formalized ones, that due to their mechanisms feature defined contributions plans or defined benefit plans. In the first case, the companys obligation, consisting in making payments to the State or to a trust or a fund, is determined on the basis of contributions due. The liabilities related to defined benefit plans 11 , net of any plan assets, are determined on the basis of actuarial assumptions 12 and charged to the relevant year consistently with the employment period required to obtain the benefits; the evaluation of liabilities is made by independent actuaries. The actuarial gains and losses of defined benefit plans, deriving from a change in the actuarial assumptions used or from a change in the conditions of the plan, are charged to the profit and loss account, proportionally through the residual average working life of the employees participating to the plan, in the limits of the share of the discounted profit/loss not charged beforehand, that exceeds the greater of 10% of liabilities and 10% of the fair value of the plan assets (corridor method). Treasury shares Treasury shares are recorded at cost and as a reduction of shareholders equity. Gains following subsequent sales are recorded as an increase in shareholders equity. Revenues and costs Revenues from sales of products and services rendered are recognized upon transfer of risks and advantages associated to the property or upon settlement of the transaction. In particular, revenues are recognized: - for crude oil, generally upon shipment; - for natural gas, when the natural gas is delivered to the customer; - for petroleum products sold to retail distribution networks, generally upon delivery to the service stations, whereas all other sales are generally recognized upon shipment; - for petrochemical products and other products, generally upon shipment. Revenues are recognized upon shipment when, at that, date the risks of loss are transferred to the acquirer. Revenues from the sale of crude oil and natural gas produced in properties in which Eni has an interest together with other producers are recognized on the basis of Enis working interest in those properties (entitlement method). Differences between Enis net working interest volume and actual production volumes are recognized at current prices at period-end. Income related to partially rendered services are recognized with respect to the accrued revenues, if it is possible to reasonably determine the state of completion and there are no relevant uncertainties concerning the amounts and the existence of the revenue and related costs; otherwise they are recognized within the limits of the recoverable costs incurred. The revenues accrued in the period related to construction contracts are recognized on the basis of contractual revenues by reference to the stage of completion of a contract measured on the cost-to-cost basis. The requests of additional revenues, deriving from a change in the scope of the work, are included in the total amount of revenues when it is probable that the customer will approve the variation and the relevant amount; claims deriving for instance from additional costs incurred for reasons attributable to the client are included in the total amount of revenues when it is probable that the counterpart will accept them. Revenues are stated net of returns, discounts, rebates and bonuses, as well as directly related taxation. Exchanges of goods and services with similar nature and value do not give rise to revenues and costs as they do not represent sale transactions. Costs are recognized when the related goods and services are sold, consumed or allocated, or when their future useful lives cannot be determined. Costs related to the amount of emissions, determined on the basis of the average prices of the main European markets at the end of the period, are reported in relation to the amount of the carbon dioxide emissions that exceed the amount assigned; revenues are related to the amount of emissions are reported when are recognized following the sale.

| (11) | Given the
uncertainties related to their payment date, employees
termination indemnities are considered as a defined
benefit plan. |
| --- | --- |
| (12) | Actuarial
assumptions relate to, inter alia, the following
variables: (i) future salary levels; (ii) the mortality
rate of employees; (iii) personnel turnover; (iv) the
percentage of plan participants with dependents who are
eligible to receive benefits (e.g. spouses and dependent
children); (v) for medical plans, the frequency of claims
and future medical costs; (vi) interest rates. |

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Operating lease payments are recognized in the profit and loss account over the length of the contract. Labor costs include stock grants and stock options granted to managers, consistent with their actual remunerative nature. The cost is determined based on the fair value of the rights awarded to the employee; the portion relevant to the year is calculated pro rata over the period to which the incentive refers (vesting period) 13 . The fair value of stock grants is represented by the current value of the shares at the date of the award, reduced by the current value of the expected dividends in the vesting period. The fair value of stock options is the value of the option calculated with the Black-Scholes method that takes into account the exercise conditions, current price of the shares, expected volatility and the risk-free interest rate. The fair value of the stock grants and stock options is shown as a contra-entry to Other reserves. The costs for the acquisition of new knowledge or discoveries, the study of products or alternative processes, new techniques or models, the planning and construction of prototypes or, in any case, costs borne for other scientific research activities or technological development, are generally considered current costs and expensed as incurred. Exchange rate differences Revenues and costs concerning transactions in currencies other than functional currency are stated at the exchange rate on the date that the transaction is completed. Monetary assets and liabilities in currencies other than functional currency are converted by applying the year-end exchange rate and the effect is stated in the profit and loss account. Non-monetary assets and liabilities in currencies other than functional currency valued at cost are stated at the initial exchange rate; when they are evaluated at recoverable value or realizable value, the exchange rate applied is that of the day of recognition. Dividends Dividends are recognized at the date of the general shareholders meeting in which they were declared, except when the sale of shares before the ex-dividend date is certain. Income taxes Current income taxes are determined on the basis of estimated taxable income; the estimated liability is recognized in the item Income tax liabilities. Current tax assets and liabilities are measured at the amount expected to be paid to (recovered from) the tax authorities, using the tax rates (and tax laws) that have been enacted or substantively enacted at the balance sheet date. Deferred tax assets or liabilities are provided on temporary differences arising between the carrying amounts of the assets and liabilities in the financial statements and their tax bases. Deferred tax assets are recognized when their realization is considered probable. Deferred tax assets and liabilities are recorded under non-current assets and liabilities and are offset at single entity level if related to offsettable taxes. The balance of the offset, if positive is recognized in the item Deferred tax assets and if negative in the item Deferred tax liabilities. When the results of transactions are recognized directly in the shareholders equity, current taxes, deferred tax assets and liabilities are also charged to the shareholders equity. Derivatives Derivatives, including embedded derivatives which are separated from the host contract, are assets and liabilities recognized at their fair value. Derivatives are classified as hedging instruments when the relationship between the derivative and the subject of the hedge is formally documented and the effectiveness of the hedge is high and is checked periodically. When hedging instruments cover the risk of variation of the fair value of the hedged item (fair value hedge; e.g. hedging of the variability on the fair value of fixed interest rate assets/liabilities), the derivatives are stated at fair value and the effects charged to the profit and loss account; consistently the hedged items are adjusted to reflect the variability of fair value associated with the hedged risk. When derivatives hedge the cash flow variation risk of the hedged item (cash flow hedge; e.g. hedging the variability on the cash flows of assets/liabilities as a result of the fluctuations of exchange rate), changes in the fair value of the derivatives are initially stated in net equity and then recognized in the profit and loss account consistent with the economic effects produced by the hedged transaction. The change in the fair value of derivatives that do not meet the conditions required to qualify as hedging instruments are shown in the profit and loss account.

(13) For stock grants, the period between the date of the award and the date of assignation of stock; for stock options, period between the date of the award and the date on which the option can be exercised.

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Use of accounting estimates The preparation of these consolidated financial statements requires Management to apply accounting methods and policies that are based on difficult or subjective judgments, estimates based on past experience and assumptions determined to be reasonable and realistic based on the related circumstances. The application of these estimates and assumptions affects the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the balance sheet date and the reported amounts of income and expenses during the reporting period. Actual results may differ from these estimates given the uncertainty surrounding the assumptions and conditions upon which the estimates are based. Summarized below are the accounting estimates that require the more subjective judgment of our management. Such assumptions or estimates regard the effects of matters that are inherently uncertain and for which changes in conditions may significantly affect future results. Oil and gas activities Engineering estimates of the Companys oil and gas reserves are inherently uncertain. Proved reserves are the estimated volumes of crude oil, natural gas and gas condensates, liquids and associated substances which geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions. Although there are authoritative guidelines regarding the engineering criteria that have to be met before estimated oil and gas reserves can be designated as proved, the accuracy of any reserve estimate is a function of the quality of available data and engineering and geological interpretation and judgement. Results of drilling, testing and production after the date of the estimate may require substantial upward and downward revision. In addition changes in oil and natural gas prices could have an effect on the value of Enis proved reserves as regards the initial estimate and, in the case of Production Sharing Agreements and buy-back contracts, on the relevant production and reserves. Accordingly, the estimated reserves could be materially different from the quantities of oil and natural gas that ultimately will be recorded. Estimated proved reserves are used in determining depreciation and depletion expenses and impairment expense. Depreciation rates on oil and gas assets using the UOP basis are determined from the ratio between the amount of hydrocarbons extracted in the year and proved developed reserves existing at the year-end increased by the amounts extracted during the year. Assuming all other variables are held constant, an increase in estimated proved reserves decreases depreciation, depletion and amortization expense. On the contrary, a decrease in estimated proved reserves increases depreciation, depletion and amortization expense. Also, estimated proved reserves are used to calculate future cash flows from oil and gas properties, which serve as an indicator in determining whether a property impairment is to be carried out or not. The larger the volumes of estimated reserves, the less likely the property is impaired. Impairment of assets Fixed assets and intangible assets are written down whenever events and changes in circumstances indicate that the carrying amount may not be recoverable. The amount of an impairment charge is determined by comparing the book value of an asset with its recoverable amount. The recoverable amount is the greater of fair value, net of disposal costs and value in use, net of disposal costs. The estimated fair value usually is based on the present values of expected future cash flows using assumptions commensurate with the risks involved in the asset group. The expected future cash flows used for impairment reviews are based on judgmental assessments of future production volumes, prices and costs, considering available information at the date of review and are discounted by using a rate related to the activity involved. For oil and natural gas properties, the expected future cash flows are estimated based on developed and non developed proved reserves including, among other elements, production taxes and the costs to be incurred for the reserves yet to be developed. The estimated future level of production is based on assumptions about future commodity prices, lifting and development costs, field decline rates, market demand and supply, economic regulatory climates and other factors. Asset retirement obligation Obligations related to the removal of tangible equipment and the restoration of land or seabed once operations are terminated imply the recognition of significant obligations. Estimating the future asset removal costs is difficult and requires Management to make estimates and judgements because most of the removal obligations are many years in the future and contracts and regulations often have vague descriptions of what constitutes removal. Asset removal technologies and costs are constantly changing, as well as political, environmental, safety and public relations considerations. The criticality of these estimates is also increased by the accounting method used that requires entities to record the fair value of a liability for an asset retirement

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obligations in the period when it is incurred (typically at the time the asset is installed at the productions location). When the liability is initially recorded, the related fixed assets is increased by an equal corresponding amount. Over time, the liabilities are increased for the provisions due to reflect the passage of time and any change of the estimates following the modification of the future cash flows, the discounting rate or the discount rate adopted. The recognized asset retirement obligations liability amounts are based upon future retirement cost estimates and incorporate many assumptions such as expected recoverable quantities of crude oil and natural gas, time to abandonment, future inflation rates and the risk-free rate of interest adjusted for the Companys credit costs. Business combinations Accounting for the acquisition of a business requires the allocation of the difference between the purchase price and the book value to various assets and liabilities of the acquired business. For most assets and liabilities, the allocation of such difference is accomplished by recording the asset or liability at its estimated fair value. Any positive residual difference is recognized as Goodwill. Negative residual differences are charged against profit and loss account. Management uses all available information to make these fair value determinations and, for major business acquisitions, typically engage an outside appraisal firm to assist in the fair value determination of the acquired long-lived assets. Environmental liabilities Together with other companies in the industries in which it operates, Eni is subject to numerous EU, national, regional and local environmental laws and regulations concerning its oil and gas operations, productions and other activities, including legislation that implements international conventions or protocols. Environmental costs are made when it becomes probable or certain that a liability has been incurred and the amount can be reasonably estimated. Although management, considering the actions already taken, the insurance policies to cover environmental risks and provision for risks accrued, does not expect any material adverse effect upon Enis consolidated results of operations and financial position as a result of its compliance with such laws and regulations, there can be no assurance that there will not be a material adverse impact on Enis consolidated results of operations and financial position due to: (i) the possibility of as yet unknown contamination; (ii) the results of the on-going surveys and the other possible effects of statements required by Decree No. 471/1999 of the Ministry of Environment concerning the remediation of contaminated sites; (iii) the possible effect of future environmental legislation and rules, like the Decree No. 367 of the Ministry of Environment, published on 8 January 2004, that introduces new quality standards for aquatic environment and dangerous substances and those that may derive from the legislative decree that the Italian Government will have to enact in order to implement Directive 2000/60/EC creating a framework for joint European action in the area of water; (iv) the effect of possible technological changes relating to future remediation; and (v) the possibility of litigation and the difficulty of determining Enis liability, if any, as against other potentially responsible parties with respect to such litigation and the possible insurance recoveries. Contingencies In addition to accruing the estimated costs for asset retirement obligation and environmental liabilities, Eni accrues for all contingencies that are both probable and estimable. These other contingencies are primarily related to employee benefits, litigation and tax issues. Determining appropriate amounts for accrual is a complex estimation process that includes subjective judgements. Recent accounting principles With the regulations No. 1910/2005, 2106/2005 and 108/2006 issued between November 2005 and January 2006 the European Commission approved some modifications and integrations to the international accounting standards. In particular the main modifications/integrations concern the following standards: IAS 19 EMPLOYEE BENEFITS Amendments to IAS 19 essentially concern the approval of the option related to the recognition in the period when they incur of the total amount of actuarial gains and losses with a corresponding entry to a specific reserve in shareholders equity.

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IAS 39 FINANCIAL INSTRUMENTS: RECOGNITION AND MEASUREMENT In relation to cash flow hedge operations on exchange rate risk, IAS 39 has been integrated with the aim of qualifying as hedging instruments the intercompany transactions expected and with an high probability, on condition that: (i) these transactions are denominated in a functional currency other than the currency of the entity that carries out the operation; (ii) the exposure to the exchange rate risk determines some effects in consolidated profit and loss account. Amendments to IAS 39 also concerned the recognition and measurement of financial guarantees. In particular, financial guarantees are recorded when they are issued, as liability valued at the market value and, then, in relation to the execution risk, at the greater between: (i) the best estimate of the charge to be sustained to fulfill the obligation; (ii) the initial amount reduced of premiums collected. IFRS 7 FINANCIAL INSTRUMENTS: DISCLOSURES AND IAS 1, PRESENTATION OF FINANCIAL STATEMENTS IFRS 7 establishes the disclosures to be given about financial instruments and the about the exposure and management of financial risks. The requirements of IFRS 7 include some disclosures currently contained in IAS 32 Financial instruments: exposures and additional disclosures. Also by the amendment of IAS 1, it is requested to give disclosure of objectives, policies and processes for managing capital. IFRIC 4 DETERMINING WHETHER AN ARRANGEMENT CONTAINS A LEASE Requirements of IFRIC 4 provide guidance for determining whether arrangements that do not take the legal form of a lease but which convey rights to use assets in return for a payment or series of payments. In particular, for determining whether an arrangement is, or contains a lease, an entity should consider the purposes of the operation and verify if the arrangement: (i) provides, explicitly or implicitly, the use of an asset (or a group of assets) and the fulfillment of the arrangement depends upon such specific assets; (ii) transfers the right to use such assets. IFRIC 5 RIGHTS TO INTERESTS ARISING FROM DECOMMISSIONING, RESTORATION AND ENVIRONMENTAL FUNDS Requirements of IFRIC 5 provide guidance for determining the recognition and measurement for the contribution to decommissioning, restoration and environmental rehabilitation funds that have the following features: (i) the assets are held or administered by a separate legal entity; (ii) contributors right to access the assets of the fund is restricted. The contributor recognizes its obligation to pay decommissioning costs as a liability and its interest in the fund separately. In the case that the interest means a control, a joint control or a significant influence over the fund, the contributor must recognize the interest in the fund as an investment in a subsidiary, associate, or a jointly controlled. Modifications and integrations to international accounting principles will be effective starting from 1 January 2006 and from 31 January 2007 for IFRS 7. Eni presently is analyzing the statements and, at the moment, cannot determine if their adoption will have a significant effect on Enis consolidated financial position or operating results.

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Notes to the consolidated financial statements Current activities 1 Cash and cash equivalent Cash and cash equivalent of euro 1,333 million (euro 1,003 million at 31 December 2004) include financing receivables due within 90 days for euro 122 million (euro 167 million at 31 December 2004) and include deposits with financial institutions with a notice greater than 48 hours and securities held for sale with a maturity date within 90 days.

2 Other financial assets for trading or held for sale Other financial assets for trading or held for sale of euro 1,368 million (euro 1,266 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Listed
Italian treasury bonds | 980 | 1,088 |
| --- | --- | --- |
| Listed securities issued by Italian and foreign
merchant banks | 255 | 243 |
| Not quoted
securities | 31 | 37 |
| | 1,266 | 1,368 |

Securities of euro 1,368 million (euro 1,266 million at 31 December 2004) are available for sale. At 31 December 2004 and 31 December 2005 Eni did not own financial assets held for trading. Valuation at fair value determined an increase for securities of euro 8 million recorded with a corresponding entry to the shareholders equity (euro 6 million) and deferred tax liabilities (euro 2 million). At 1 January 2005 the first application of IAS 32 and 39 determined an increase of euro 19 million with a corresponding entry to the shareholders equity (euro 13 million) and to deferred tax liabilities (euro 6 million). Securities for euro 465 million (euro 474 million at 31 December 2004) are made for operating purposes and concern coverage securities of technical reserves of Padana Assicurazioni SpA for euro 453 million (euro 474 million at 31 December 2004). 3 Trade and other receivables Trade and other receivables of euro 17,902 million (euro 13,734 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Trade
receivables | 10,525 | 14,101 |
| --- | --- | --- |
| Financing receivables | 521 | 492 |
| Other
receivables | 2,688 | 3,309 |
| | 13,734 | 17,902 |

Receivables are recorded net of the allowance for doubtful accounts of euro 891 million (euro 755 million at 31 December 2004):

(million euro) Value at 31.12.2004 Additions Deductions Other changes Value at 31.12.2005

Trade receivables	570	119	(22	)	(24	)	643
Other
receivables	185	123	(10	)	(50	)	248
	755	242	(32	)	(74	)	891

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Trade receivables of euro 14,101 increased by euro 3,576 million. This increase relates primarily to the Gas & Power segment (euro 1,671 million), Refining & Marketing (euro 1,010 million) and Exploration & Production (euro 806 million) and concern exchange rate differences due to the translation of financial statements prepared in currencies other than euro for euro 216 million. Trade receivables concern advances paid as a guarantee of contract work in progress for euro 101 million (euro 95 million at 31 December 2004). Financing receivables of euro 492 million (euro 521 million) concern receivables made for operating purposes for euro 480 million (euro 510 million at 31 December 2004). Other receivables of euro 3,309 million (euro 2,688 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Accounts receivable from: — - joint
venture operators in exploration and production | 784 | 1,123 |
| --- | --- | --- |
| - insurance companies | 322 | 539 |
| - Italian
governmental entities | 216 | 228 |
| | 1,322 | 1,890 |
| Receivables
relating to factoring activities | 347 | 324 |
| Prepayments for services | 204 | 259 |
| Other
receivables | 815 | 836 |
| | 2,688 | 3,309 |

Receivables relating to factoring activities for euro 324 million (euro 347 million at 31 December 2004) relate to Serfactoring SpA and concern essentially advances for factoring activities with recourse and receivables for factoring activities without recourse. Receivables with related parties are described in note 32. 4 Inventories Inventories of euro 3,563 million (euro 2,847 million at 31 December 2004) consist of the following:

31.12.2004 31.12.2005

(million euro) Crude oil, gas and petroleum products Chemical products Work in progress long-term contracts Other Total Crude oil, gas and petroleum products Chemical products Work in progress long-term contracts Other Total

| Raw and
auxiliary materials and consumables | 303 | 199 | | 394 | 896 | 210 | 217 | | 645 | 1,072 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Products being processed and semi finished
products | 37 | 19 | | 2 | 58 | 59 | 18 | | 1 | 78 |
| Work in
progress long-term contracts | | | 399 | | 399 | | | 418 | | 418 |
| Finished products and goods | 891 | 482 | | 37 | 1,410 | 1,222 | 572 | | 20 | 1,814 |
| Advances | | | 84 | | 84 | | | 181 | | 181 |
| | 1,231 | 700 | 483 | 433 | 2,847 | 1,491 | 807 | 599 | 666 | 3,563 |

Inventories are net of the valuation allowance of euro 93 million (euro 129 million at 31 December 2004):

(million euro) Value at 31.12.2004 Additions Deductions Other changes Value at 31.12.2005

129 19 (82 ) 27 93

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Work in progress long-term contracts of euro 418 million (euro 399 million at 31 December 2004) are net of the payments received in advance of euro 5,180 million (euro 5,156 million at 31 December 2004). At 1 January 2005, date of the first application of IAS 32 and 39, inventories for work in progress long-term contracts were restated by excluding from the valuation the effects related to derivatives that do not meet the conditions required to qualify as hedging instruments. The exclusion of the effects related to derivatives determined a decrease for work in progress long-term contracts of euro 38 million with a corresponding entry to the shareholders equity (euro 24 million) and to deferred tax assets (euro 14 million). 5 Income tax receivables Income tax receivables of euro 697 million (euro 674 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

Italian tax authorities	466	422
Foreign
tax authorities	208	275
	674	697

Income tax receivables of euro 697 million (euro 674 million at 31 December 2004) concern value added tax credits for euro 406 million (euro 459 million at 31 December 2004) and excise taxes customs duties natural gas and customs expenses for euro 60 million (euro 29 million at 31 December 2004). 6 Other assets Other assets of euro 369 million (euro 588 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Fair value
of non-hedging derivatives | | 117 |
| --- | --- | --- |
| Fair value of cash flow hedge derivatives | | 32 |
| Other
assets | 588 | 220 |
| | 588 | 369 |

At 1 January 2005 the first application of IAS 32 and 39 determined the accounting at the fair value of derivatives that do not meet the conditions required to qualify as hedging instruments for an amount, net of differentials on derivative contracts (Italian GAAP), of euro 76 million with a corresponding entry to the shareholders equity (euro 32 million) and to deferred tax liabilities (euro 44 million). Commitments concerning non-hedging derivatives amounted to euro 5,367 million and concern commitments on exchange rate for euro 3,681 million (fair value of euro 73 million), on interest rate for euro 1,281 million (fair value of euro 14 million) and on commodities for euro 405 million (fair value of euro 30 million). Commitments concerning cash flow hedge derivatives amounted to euro 176 million and concern for euro 171 million hedging derivatives contracts related to the purchase of electricity. Other assets of euro 220 million (euro 588 million at 31 December 2004) include accrued income and prepaid expenses for anticipated provision of service of euro 49 million (euro 91 million at 31 December 2004), for rentals and fees of euro 16 million (euro 22 million at 31 December 2004) and for premiums due to insurance companies euro 12 million (euro 18 million at 31 December 2004). At 31 December 2004 other assets include differentials on derivative contracts for euro 316 million, of which euro 242 million relating to financing receivables and liabilities.

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Non-current activities 7 Fixed assets Fixed assets of euro 45,013 million (euro 40,586 million at 31 December 2004) consist of the following:

(million euro) Net value at the beginning of the year Investments Depreciation Impairment Exchange rate differences Other changes Net value at the end of the year Gross value at the end of the year Reserve for amortization and writedown

31.12.2004 — Land	1,185	7			(8	)			(987	)	197	274	77
Buildings	608	45	(97	)	(4	)	5		1,021		1,578	3,159	1,581
Plant and machinery	28,246	2,878	(3,349	)	(149	)	(769	)	3,992		30,849	66,312	35,463
Industrial
and commercial equipment	517	159	(120	)	(1	)	(6	)	(127	)	422	1,622	1,200
Other assets	286	91	(104	)	(1	)	(7	)	64		329	1,149	820
Fixed
assets in progress and advances	8,501	3,605			(166	)	(305	)	(4,424	)	7,211	7,762	551
	39,343	6,785	(3,670	)	(329	)	(1,082	)	(461	)	40,586	80,278	39,692
31.12.2005
Land	197	5			(4	)			175		373	421	48
Buildings	1,578	41	(108	)	(8	)	12		(62	)	1,453	3,152	1,699
Plant and machinery	30,849	2,443	(4,240	)	(192	)	1,827		5,881		36,568	77,806	41,238
Industrial
and commercial equipment	422	113	(126	)			10		(47	)	372	1,623	1,251
Other assets	329	65	(102	)			12		14		318	1,182	864
Fixed
assets in progress and advances	7,211	3,891			(60	)	590		(5,703	)	5,929	6,526	597
	40,586	6,558	(4,576	)	(264	)	2,451		258		45,013	90,710	45,697

Capital expenditures of euro 6,558 million (euro 6,785 million at 31 December 2004) primarily relate to the Exploration & Production segment (euro 4,269 million), Gas & Power segment (euro 1,079 million), Refining & Marketing segment (euro 642 million) and Oilfield Services Construction and Engineering segment (euro 343 million, of which euro 340 million related to the construction and drilling activity). Capital expenditures include financial expense for euro 159 million essentially relating to the Exploration & Production segment (euro 97 million), Refining & Marketing segment (euro 31 million) and Gas & Power segment (euro 29 million). The interest rate used for the capitalization of finance expense was between 2.2% and 6.1%. Additional information on capital expenditures is included in the Operating Review of the Report of the Directors. Depreciation rates used, with the exclusion of tangible assets depreciated on Unit-Of-Production (UOP) basis, are as follows:

(%) — Buildings	2	-	10
Plant and machinery	2	-	10
Industrial and commercial equipment	4	-	33
Other assets	6	-	33

Exchange rate differences due to the translation of financial statements prepared in currencies other than euro of euro 2,451 million relate to companies whose functional currency is the US dollar (euro 2,300 million). Impairments of euro 264 million concern primarily mineral assets of the Exploration & Production segment (euro 156 million) and petrochemical assets of Syndial SpA (euro 75 million). The recoverable amount considered in determining the impairment was calculated by discounting the future cash flows using a rate included between 6.5% and 9.8%. Other changes of euro 258 million include the initial recognition and the reviews to the estimate of dismantling and restoration of sites for euro 576 million essentially related to the Exploration & Production segment (euro 562 million); this increase was partially

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offset by the change in scope of consolidation of euro 122 million following essentially the sale of Società Azionaria per la Condotta di Acque Potabili SpA (euro 82 million), Acquedotto Vesuviano SpA (euro 20 million) and Acquedotto di Savona SpA (euro 20 million) and the sale of businesses and the elimination of fixed assets of euro 97 million primarily related to the Exploration & Production segment (euro 37 million). The gross carrying amount of fully depreciated property, plant and equipment that is still in use amount to euro 11,076 million and primarily concern the gasline network of Snam Rete Gas SpA (euro 3,692 million), refineries and oil deposits of Refining & Marketing segment (euro 2,639 million) and petrochemical plants of Polimeri Europa SpA (euro 1,901 million) and Syndial SpA (euro 1,598 million). Government grants recorded as decrease of property, plant and equipment amount to euro 965 million (euro 910 million at 31 December 2004). At 31 December 2005 fixed assets have been pledged for euro 475 million primarily as collateral on debt incurred by Eni (euro 482 million at 31 December 2004). Assets acquired under financial lease amount to euro 134 million and concern for euro 72 million FPSO ships used by the Exploration & Production segment as support of oil production and treatment activities.

Fixed assets by segment

(million euro) 31.12.2004 31.12.2005

| Fixed
assets, gross: — - Exploration & Production | 40,322 | 49,120 | |
| --- | --- | --- | --- |
| - Gas
& Power | 20,680 | 21,517 | |
| - Refining & Marketing | 8,947 | 9,420 | |
| -
Petrochemicals | 4,311 | 4,402 | |
| - Oilfield Services Construction and Engineering | 3,524 | 3,878 | |
| - Other
activities | 2,300 | 2,248 | |
| - Corporate and financial companies | 194 | 213 | |
| -
Elimination of intra-group profits | | (88 | ) |
| | 80,278 | 90,710 | |
| Accumulated
depreciation, amortization and writedowns: | | | |
| - Exploration & Production | 19,561 | 24,640 | |
| - Gas
& Power | 7,445 | 7,757 | |
| - Refining & Marketing | 5,586 | 5,864 | |
| -
Petrochemicals | 3,130 | 3,263 | |
| - Oilfield Services Construction and Engineering | 1,878 | 2,031 | |
| - Other
activities | 2,007 | 2,054 | |
| - Corporate and financial companies | 85 | 92 | |
| -
Elimination of intra-group profits | | (4 | ) |
| | 39,692 | 45,697 | |
| Fixed
assets, net: | | | |
| - Exploration & Production | 20,761 | 24,480 | |
| - Gas
& Power | 13,235 | 13,760 | |
| - Refining & Marketing | 3,361 | 3,556 | |
| -
Petrochemicals | 1,181 | 1,139 | |
| - Oilfield Services Construction and Engineering | 1,646 | 1,847 | |
| - Other
activities | 293 | 194 | |
| - Corporate and financial companies | 109 | 121 | |
| -
Elimination of intra-group profits | | (84 | ) |
| | 40,586 | 45,013 | |

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8 Inventories - compulsory stock Inventories - compulsory stocks of euro 2,194 million (euro 1,386 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

Crude oil and petroleum products	1,229	2,037
Natural
gas	157	157
	1,386	2,194

Compulsory stocks, are primarily held by Italian companies (euro 1,286 and euro 2,057 million at 31 December 2004 and at 31 December 2005, respectively) and represent certain minimum quantities required by Italian law. 9 Intangible assets Intangible assets of euro 3,194 million (euro 3,313 million at 31 December 2004) consist of the following:

(million euro) Net value at the beginning of the year Investments Amortization Other changes Net value at the end of the year Gross value at the end of the year Reserve for amortization and writedown

31.12.2004
Intangible assets with a definite life
Costs for
research and development	167	549	(634	)	25		107	843	736
Industrial patent rights and intellectual
property rights	162	60	(137	)	89		174	977	803
Concessions,
licenses, trademarks and similar items	934	10	(106	)	(22	)	816	2,154	1,338
Intangible assets in progress and advances	133	71			(145	)	59	64	5
Other
intangible assets	203	11	(54	)	64		224	549	325
	1,599	701	(931	)	11		1,380	4,587	3,207
Intangible
assets with a indefinite life
Goodwill	1,982	13			(62	)	1,933
	3,581	714	(931	)	(51	)	3,313
31.12.2005
Intangible
assets with a definite life
Costs for research and development	107	699	(683	)	41		164	1,059	895
Industrial
patent rights and intellectual property rights	174	37	(122	)	48		137	1,056	919
Concessions, licenses, trademarks and similar
items	816	31	(101	)			746	2,205	1,459
Intangible
assets in progress and advances	59	74			(57	)	76	81	5
Other intangible assets	224	13	(30	)	(50	)	157	470	313
	1,380	854	(936	)	(18	)	1,280	4,871	3,591
Intangible assets with a indefinite life
Goodwill	1,933	2			(21	)	1,914
	3,313	856	(936	)	(39	)	3,194

Costs for research and development for euro 164 million mainly concern the purchase of mineral rights (euro 157 million). This item also includes exploration expenditures amortized in the year for euro 565 million (euro 491 million in the year 2004). Concessions, licenses, trademarks and similar items for euro 746 million primarily concern the transmission rights for natural gas imported from Algeria (euro 618 million) and concessions for mineral exploration (euro 67 million). Other intangible assets with a definite life of euro 157 million include royalties for the use of licenses by Polimeri Europa SpA (euro 86 million) and the estimated expenditures for social projects to be incurred following contractual commitments with the Basilicata Region related to mineral development programs in Val dAgri (euro 32 million).

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Depreciation rates used are as follows:

| (%) — Costs for research and
development | 10 | - | 33 |
| --- | --- | --- | --- |
| Industrial patent rights and
intellectual property rights | 20 | - | 33 |
| Concessions, licenses, trademarks and similar
items | 7 | - | 33 |
| Other intangible assets | 4 | - | 25 |

The gross carrying amount of fully depreciated intangible assets that is still in use amount to euro 9,311 million and primarily concern costs for mineral research of Exploration & Production segment (euro 8,738 million). Goodwill for euro 1,914 million concerns primarily the Oilfield Services Construction and Engineering segment (euro 823 million, of which euro 805 million relates to the purchase of Bouygues Offshore SA, now Saipem SA), the Gas & Power segment (euro 817 million, of which euro 803 million relates to the Public Offering for Italgas SpA shares during 2003), the Exploration & Production segment (euro 220 million, of which euro 215 million relates to the purchase of Lasmo Plc, now Eni Lasmo Plc) and the Refining & Marketing segment (euro 51 million). In order to determine the recoverable amount, goodwill related to the acquisition of Bouygues Offshore SA and Italgas SpA has been allocated to the following cash generating units:

(million euro) 31.12.2005

| Bouygues
Offshore SA | |
| --- | --- |
| Offshore constructions | 403 |
| Onshore
constructions | 165 |
| LNG | 159 |
| MMO -
Maintenance Modification and Operation | 78 |
| | 805 |
| Italgas
SpA | |
| Domestic gas market | 706 |
| Foreign
gas market | 97 |
| | 803 |

The recoverable amount of cash generating units is determined based on expected cash flow estimated by using the strategic lines of Enis 2006-2009 plan and discounted by using a rate included between 5.6% and 7%. For the years not included in the strategic lines plan, has been used an incremental rate included between 0% and 3%. Key assumptions are based on past experience and take into account the current level of interest rate. Other changes of euro 39 million primarily relate to the sale of Società Azionaria per la Condotta di Acque Potabili SpA (euro 18 million) and Acquedotto Vesuviano SpA (euro 3 million).

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10 Investments Investments accounted for using the equity method Investments accounted for using the equity method of euro 3,890 million (euro 3,156 million at 31 December 2004) consist of the following:

(million euro) Value of the beginning of the year Acquisitions and subscriptions Gain from the valuation of investments accounted for using the equity method Loss from the valuation of investments accounted for using the equity method Deduction for dividends Exchange rate differences Other changes Value of the end of the year

31.12.2004 — Investments in unconsolidated subsidiaries	106	11	6	(6	)			(4	)	(4	)	109
Investments
in joint ventures	1,851	119	215	(6	)	(276	)	(47	)	90		1,946
Investments in affiliates	947	119	180	(57	)	(71	)	(19	)	2		1,101
	2,904	249	401	(69	)	(347	)	(70	)	88		3,156
31.12.2005
Investments
in unconsolidated subsidiaries	109	30	6	(2	)	(3	)	10		(4	)	146
Investments in joint ventures	1,946	12	375	(27	)	(202	)	98		120		2,322
Investments
in affiliates	1,101	6	389	(4	)	(96	)	34		(8	)	1,422
	3,156	48	770	(33	)	(301	)	142		108		3,890

Acquisitions and subscriptions for euro 48 million concerned mainly the subscriptions of capital increase of Servizi Porto Marghera Scrl (euro 17 million), Enirepsa Gas Ltd (euro 12 million) and Lasmo Petroleum Development BV (euro 10 million) and the acquisition of Acam Clienti SpA by Eni SpA (euro 6 million). Gains from the valuation of investments using the equity method of euro 770 million primarily relate to Galp Energia SGPS SA (euro 280 million), Trans Austria Gasleitung GmbH (euro 54 million), Lipardiz Construçao de Estruturas Maritimas Lda (euro 46 million), UniÓn Fenosa Gas SA (euro 44 million) and Blue Stream Pipeline Co BV (euro 30 million). Losses from the valuation of investments using the equity method of euro 33 million primarily relate to Geopromtrans Llc (euro 11 million) and Enirepsa Gas Ltd (euro 11 million). Deduction following the distribution of dividends of euro 301 million primarily relates to Galp Energia SGPS SA (euro 56 million), Trans Europa Naturgas Pipeline GmbH (euro 29 million) and Trans Austria Gasleitung GmbH (euro 28 million) and Supermetanol CA (euro 28 million).

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The net carrying value of euro 3,890 million (euro 3,156 million at 31 December 2004) consists of the following companies:

(million euro) 31.12.2004 31.12.2005

Net value Enis interest Net value Enis interest

| Unconsolidated
subsidiaries: — - Eni Btc Ltd | 48 | 100.00 | 55 | 100.00 |
| --- | --- | --- | --- | --- |
| - Others () | 61 | | 91 | |
| | 109 | | 146 | |
| Joint
ventures: | | | | |
| - UniÓn Fenosa Gas SA | 404 | 50.00 | 459 | 50.00 |
| - Blue
Stream Pipeline Co BV | 116 | 50.00 | 280 | 50.00 |
| - Raffineria di Milazzo ScpA | 168 | 50.00 | 172 | 50.00 |
| - EnBW -
Eni Verwaltungsgesellschaft mbH | 150 | 50.00 | 168 | 50.00 |
| - Azienda Energia e Servizi Torino SpA | 171 | 49.00 | 165 | 49.00 |
| - Eteria
Parohis Aeriou Thessalonikis AE | 151 | 49.00 | 152 | 49.00 |
| - Super Octanos CA | 82 | 49.00 | 113 | 49.00 |
| - Trans
Austria Gasleitung GmbH | 60 | 89.00 | 88 | 89.00 |
| - Supermetanol CA | 59 | 34.51 | 88 | 35.20 |
| - Unimar
Llc | 97 | 50.00 | 84 | 50.00 |
| - FPSO Mystras - Produção de Petroleo Lda | 75 | 50.00 | 73 | 50.00 |
| - Lipardiz
Construção de Estruturas Maritimas Lda | 20 | 50.00 | 66 | 50.00 |
| - Transmediterranean Pipeline Co Ltd | 57 | 50.00 | 63 | 50.00 |
| -
Siciliana Gas SpA | 52 | 50.00 | 60 | 50.00 |
| - Toscana Gas SpA | 56 | 46.10 | 55 | 46.10 |
| - Eteria
Parohis Aeriou Thessalias EA | 41 | 49.00 | 39 | 49.00 |
| - Transitgas AG | 32 | 46.00 | 32 | 46.00 |
| -
CMS&A Wll | 15 | 20.00 | 31 | 20.00 |
| - Others () | 140 | | 134 | |
| | 1,946 | | 2,322 | |
| Affiliates: | | | | |
| - Galp
Energia SGPS SA | 670 | 33.34 | 896 | 33.34 |
| - United Gas Derivatives Co (UGDG) | 97 | 33.33 | 128 | 33.33 |
| -
Fertilizantes Nitrogenados de Oriente CEC | 75 | 20.00 | 92 | 20.00 |
| - Haldor Topsøe AS | 39 | 50.00 | 62 | 50.00 |
| - Acam Gas
SpA | 44 | 49.00 | 45 | 49.00 |
| - Distribuidora de Gas del Centro SA | 37 | 31.35 | 41 | 31.35 |
| - Termica
Milazzo Srl | 27 | 40.00 | 21 | 40.00 |
| - Others (*) | 112 | | 137 | |
| | 1,101 | | 1,422 | |
| | 3,156 | | 3,890 | |

(*) Each individual amount included herein does not exceed euro 25 million.

The net value of investments in unconsolidated subsidiaries and affiliates include the differences between purchase price and Enis equity in the investments of euro 553 million. Such differences relate to UniÓn Fenosa Gas SA (euro 195 million), EnBW - Eni Verwaltungsgesellschaft mbH (euro 180 million), Galp Energia SGPS SA (euro 107 million) and Azienda Energia e Servizi Torino SpA (euro 71 million). The reserve for losses related to investments of euro 21 million (euro 30 million at 31 December 2004), included in the reserve for contingencies, relates essentially to Geopromtrans Llc (euro 19 million).

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Other investments Other investments of euro 421 million (euro 529 million at 31 December 2004) consist of the following:

(million euro) Net value at the beginning of the year Acquisitions and subscriptions Sales Exchange rate differences Other changes Net value at the end of the year Gross value at the end of the year Accumulated impairment charges

31.12.2004 — Unconsolidated subsidiaries	79						(1	)	78	86	8
Affiliates	106	2					(1	)	107	117	10
Other investments	316	65	(18	)	(20	)	1		344	398	54
	501	67	(18	)	(20	)	(1	)	529	601	72
31.12.2005
Unconsolidated
subsidiaries	78	1					(38	)	41	68	27
Affiliates	107		(100	)			2		9	9
Other
investments	344	23	(30	)	41		(7	)	371	375	4
	529	24	(130	)	41		(43	)	421	452	31

Other investments related to unconsolidated subsidiaries and affiliates are valued at cost adjusted for impairment. Investments in other companies are essentially valued at cost adjusted for impairment. Acquisitions and subscriptions for euro 24 million essentially concern the subscriptions of capital increase of Darwin LNG Pty Ltd (euro 22 million). Sales of euro 130 million essentially relate to the sale of Erg Raffinerie Mediterranee SpA (euro 100 million) and Discovery Producer Services Llc (euro 20 million). The net carrying amount of Other investments of euro 421 million (euro 529 million at 31 December 2004) concern the following companies:

(million euro) 31.12.2004 31.12.2005

Net value Enis interest Net value Enis interest

| Unconsolidated
subsidiaries () | 78 | | 41 | |
| --- | --- | --- | --- | --- |
| Affiliates: | | | | |
| - Erg
Raffinerie Mediterranee SpA | 100 | 28.00 | | |
| - Others () | 7 | | 9 | |
| | 107 | | 9 | |
| Other investments: | | | | |
| - Nigeria
LNG Ltd | 86 | 10.40 | 100 | 10.40 |
| - Darwin LNG Pty Ltd | 89 | 12.04 | 126 | 12.04 |
| - Ceska
Rafinerska AS | 30 | 16.33 | 35 | 16.33 |
| - Discovery Producer Services Llc | 19 | 16.67 | | |
| -
Interconnector (UK) Ltd | 23 | 4.62 | 27 | 5.00 |
| - Others (*) | 97 | | 83 | |
| | 344 | | 371 | |
| | 529 | | 421 | |

(*) Each individual amount included herein does not exceed euro 25 million.

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The reserve for losses related to investments of euro 64 million (euro 61 million at 31 December 2004), included in the reserves for contingencies and charges, concern the following companies:

(million euro) 31.12.2004 31.12.2005

| Industria
Siciliana Acido Fosforico - ISAF SpA (in liquidation) | 39 | 35 |
| --- | --- | --- |
| Caspian Pipeline Consortium R - Closed Joint
Stock Co | 16 | 21 |
| Other
investments | 6 | 8 |
| | 61 | 64 |

The following are the amounts, according to Enis interest, from the last available financial statements of unconsolidated subsidiaries, joint ventures and affiliates:

(million euro) 31.12.2004 31.12.2005

Unconsolidated subsidiaries Joint ventures Affiliates Unconsolidated subsidiaries Joint ventures Affiliates

Total assets	1,341		6,699	3,603	1,404		7,423	2,763
Total
liabilities	1,227		4,755	2,530	1,263		5,161	1,295
Net sales from operations	63		4,361	4,250	63		4,617	1,560
Operating
profit	(4	)	318	115	(1	)	609	176
Net profit	(1	)	172	38	(2	)	328	371

Total assets and total liabilities relating to unconsolidated companies of euro 1,404 and euro 1,263 million (euro 1,341 and euro 1,227 million at 31 December 2004) concern for euro 1,004 and euro 1,004 (euro 935 and euro 935 million at 31 December 2004) companies for which the consolidation does not produce significant effects. 11 Other financial assets Other financial receivables of euro 1,050 million (euro 936 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

Financial receivables	913	1,001
Securities	23	49
	936	1,050

Financial receivables are presented net of an impairment charge of euro 26 million (euro 21 million at 31 December 2004). Financial receivables of euro 1,001 million (euro 913 million at 31 December 2004) concern receivables made for operating purposes for euro 754 million (euro 673 million at 31 December 2004) and non-operating financial receivables for euro 247 million (euro 240 million at 31 December 2004), of which euro 241 million related to a fixed deposit held by Eni Lasmo Plc as a guarantee of a debt issue (euro 234 million at 31 December 2004). Financial receivables made for operating purposes primarily concern the Gas & Power segment (euro 499 million) and the Exploration & Production segment (euro 170 million). The increase in financial receivables made for operating purposes of euro 81 million primarily concern the exchange rate differences related to the translation of financial statements prepared in currencies other than euro (euro 96 million). Receivables in currency other than euro amount to euro 845 million (euro 712 million at 31 December 2004). Receivables due beyond 5 years amount to euro 625 million (euro 402 million at 31 December 2004). Securities of euro 49 million are considered held-to-maturity investments and concern securities issued by the Italian Government for euro 22 million and securities issued by Italian and foreign financial entities for euro 27 million. At 1 January 2005, date of the first application of IAS 32 and 39, securities for euro 50 million have been reclassified as held-to-maturity. Securities for euro 21 million concern securities made for operating purposes (euro 22 million at 31 December 2004).

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12 Deferred tax assets Deferred tax assets of euro 1,861 million (euro 1,827 million at 31 December 2004) are net of deferred tax liabilities for which Eni possesses the legal right of offset of euro 3,347 million (euro 2,346 million at 31 December 2004).

(million euro) Value at 31.12.2004 Additions Deductions Exchange rate differences Other changes Value at 31.12.2005

1,827 1,778 (927 ) 158 (975 ) 1,861

Other changes of euro 975 million primarily concern the set-off, for each company, of deferred tax assets with deferred tax liabilities (euro 1,035 million). Such decrease has been partially offset by provisions to the reserves of the shareholders equity following the first application of IAS 32 and 39 (euro 60 million). Deferred tax assets are described in Note 21. 13 Other non-current assets Other non-current assets of euro 995 million (euro 1,008 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Accounts
receivable from: | | |
| --- | --- | --- |
| - Italian tax authorities | | |
| .
income tax credits | 506 | 508 |
| . interest on tax credits | 294 | 309 |
| .
value added tax (VAT) | 55 | 37 |
| . other | 8 | 7 |
| | 863 | 861 |
| - foreign tax authorities | 49 | 44 |
| | 912 | 905 |
| Other receivables | 32 | 79 |
| Other
non-current assets | 64 | 11 |
| | 1,008 | 995 |

Current liabilities 14 Current financial liabilities Current financial liabilities of euro 4,612 million (euro 4,150 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

Banks	2,189	3,894
Financial liabilities represented by commercial
papers	1,540	60
Other
financing institutions	421	658
	4,150	4,612

The increase of current financial liabilities of euro 462 million is primarily due to the exchange rate differences related to the translation of financial statements prepared in currencies other than euro (euro 595 million). Such increase has been partially offset by the balance of payments and new proceeds of liabilities (euro 144 million).

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Short-term debt by currency is as follows:

(million euro) 31.12.2004 31.12.2005

Euro	2,393	4,029
US Dollar	1,329	323
British Pound	253	4
Other
currencies	175	256
	4,150	4,612

The weighted average interest rate of Enis short-term debt was 2.5% and 2.8% for the years ended 31 December 2004 and 2005, respectively. On 31 December 2005 Eni maintained committed and uncommitted unused lines of credit for euro 5,855 and euro 4,783 million, respectively (euro 5,304 million and euro 7,771 million, respectively, at 31 December 2004). These agreements provide for interest charges based on prevailing market conditions. Commission fees on unused lines of credit are not significant. 15 Trade and other payables Trade and other payables of euro 13,095 million (euro 10,533 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Trade
payables | 5,837 | 8,170 |
| --- | --- | --- |
| Advances | 1,211 | 1,184 |
| Other
payables | 3,485 | 3,741 |
| | 10,533 | 13,095 |

Trade payables of euro 8,170 million increase of euro 2,333 million. Such increase primarily concerns the Gas & Power segment (euro 969 million), Refining & Marketing segment (euro 577 million) and Exploration & Production segment (euro 334 million) and includes the exchange rate differences related to the translation of financial statements prepared in currencies other than euro (euro 137 million). Advances of euro 1,184 million (euro 1,211 million at 31 December 2004) concern payments received in excess of the value of the work in progress performed for euro 550 million (euro 554 million at 31 December 2004), advances on contract work in progress for euro 309 million (euro 47 million at 31 December 2004) and other advances for euro 325 million (euro 610 million 31 December 2004). Advances on contract work in progress of euro 859 million (euro 601 million at 31 December 2004) concern the Oilfield Services Construction and Engineering segment. Other payables of euro 3,741 million (euro 3,485 million at 31 December 2004) include the following:

(million euro) 31.12.2004 31.12.2005

| Payables
due to: — - joint venture operators in exploration and
production | 655 | 1,264 |
| --- | --- | --- |
| -
suppliers in relation to investments | 996 | 951 |
| - Italian governmental entities | 240 | 298 |
| -
employees | 264 | 282 |
| - social security entities | 232 | 223 |
| | 2,387 | 3,018 |
| Cautionary deposit | 20 | 5 |
| Other
payables | 1,078 | 718 |
| | 3,485 | 3,741 |

Payables with related parties are described in Note 32.

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16 Taxes payable Taxes payable of euro 3,430 million (euro 2,498 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Income
taxes payable | 1,200 | 1,742 |
| --- | --- | --- |
| Customs and excise duties | 793 | 896 |
| Other | 505 | 792 |
| | 2,498 | 3,430 |

Taxes payable of euro 1,742 million increase by euro 542 million. The increase concern foreign companies for euro 622 million primarily following the increase of profit before income taxes and the exchange rate differences related to the translation of financial statements prepared in currencies other than euro (euro 69 million); such increase was partially offset by the decrease of the income taxes of Italian companies (euro 80 million). 17 Other current liabilities Other current liabilities of euro 613 million (euro 505 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Fair value
of non-hedging derivatives | | 378 |
| --- | --- | --- |
| Fair value of cash flow hedge derivatives | | 5 |
| Other
liabilities | 505 | 230 |
| | 505 | 613 |

At 1 January 2005, the first application of IAS 32 and 39, determined the accounting at the fair value of derivatives that do not meet the conditions required to qualify as hedging instruments for an amount, net of differentials on derivative contracts, of euro 82 million with a corresponding entry to the shareholders equity (euro 36 million) and to deferred tax assets (euro 46 million). Commitments concerning non-hedging derivative contracts amounted to euro 14,305 million and concern commitments on exchange rate for euro 8,743 million (fair value of euro 214 million), on interest rate for euro 5,145 million (fair value of euro 101 million) and on commodities for euro 417 million (fair value of euro 63 million). Commitments concerning cash flow hedge derivatives amounted to euro 42 million and concern commitments on exchange rate. At 31 December 2004 other liabilities of euro 505 million include differentials on derivative contracts for euro 141 million, of which euro 46 million relating to financing receivables and liabilities.

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Non-current liabilities 18 Long-term debt and current portion of long-term debt Long-term debt and the current portion of long-term debt, including the relevant expiration dates, are as follows:

(million euro) 31 December Long-term maturity

Type of debt instrument	Maturity range	2004	2005	Current maturity 2006	2007	2008	2009	2010	After	Total
Banks:
- ordinary
loans	2006-2017	2,166	2,174	261	493	150	272	248	750	1,913
- interest rate assisted loans	2006-2013	101	45	32	4	3	2	2	2	13
- other
financings	2006	9	3	3
Ordinary bonds	2006-2027	5,331	5,339	391	705	471	126	939	2,707	4,948
Other
financing institutions	2006-2019	927	825	46	137	37	124	181	300	779
		8,534	8,386	733	1,339	661	524	1,370	3,759	7,653

Long-term debt of euro 8,386 million including the current portion of long-term debt, decreased by euro 148 million. Such decrease is primarily due to the balance of payments and new proceeds of liabilities (euro 376 million) and to the effect of exchange rate differences on the alignment to the year-end exchange rate of debts denominated in currencies other than functional currency (euro 309 million) and, as increase, to the effect of exchange rate differences on the translation of financial statements prepared in currencies other than euro (euro 478 million). Eni entered into financing arrangements with the European Investment Bank, relating to bank debt that requires maintenance of certain financial ratios generally based on Enis consolidated financial statements or of a rating not inferior to A - (S&P) and A3 (Moodys). At 31 December 2004 and 2005, the amount of short and long-term debt subject to restrictive covenants was euro 1,104 million and euro 1,258 million, respectively. Furthermore, Saipem SpA entered into financing arrangements with banks for euro 275 million (euro 300 million), that require maintenance of certain financial ratios generally based on Saipems consolidated financial statements. Eni and Saipem are in compliance with the covenants contained in its financing arrangements. Bonds of euro 5,339 million concern bonds issued within the Medium Term Notes Program for a total of euro 4,365 million and other bonds for a total of euro 974 million.

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Bonds, including the issuing entity, the expiration dates and the interest rates, by currency, are as follows:

Amount Discount on bond issue and accrued expense Total Value Maturity % rate

(million euro) from to from to

| Issuing
entity | | | | | | | | | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Euro Medium Term Notes: | | | | | | | | | |
| - Eni SpA | 1,500 | 41 | | 1,541 | Euro | | 2013 | | 4.625 |
| - Eni Coordination Center SA | 876 | (2 | ) | 874 | British pound | 2007 | 2019 | 4.875 | 5.250 |
| - Eni
Coordination Center SA | 516 | 5 | | 521 | Euro | 2007 | 2015 | variable | |
| - Eni SpA | 500 | 16 | | 516 | Euro | | 2010 | | 6.125 |
| - Eni
Coordination Center SA | 274 | 5 | | 279 | Euro | 2008 | 2024 | 2.876 | 5.050 |
| - Eni Coordination Center SA | 216 | 3 | | 219 | US dollar | 2013 | 2015 | 4.450 | 4.800 |
| - Eni
Coordination Center SA | 161 | 4 | | 165 | US dollar | 2006 | 2007 | variable | |
| - Eni Coordination Center SA | 152 | | | 152 | Japanese yen | 2008 | 2021 | 0.810 | 2.320 |
| - Eni
Coordination Center SA | 83 | 1 | | 84 | Swiss franc | 2006 | 2010 | 1.750 | 2.043 |
| - Eni Coordination Center SA | 14 | | | 14 | Swiss franc | | 2007 | variable | |
| | 4,292 | 73 | | 4,365 | | | | | |
| Other bonds: | | | | | | | | | |
| - Eni USA
Inc | 339 | 2 | | 341 | US dollar | | 2027 | | 7.300 |
| - Eni USA Inc | 254 | 1 | | 255 | US dollar | | 2006 | | 7.500 |
| - Eni
Lasmo Plc (*) | 219 | (11 | ) | 208 | British pound | | 2009 | | 10.375 |
| - Eni USA Inc | 170 | | | 170 | US dollar | | 2007 | | 6.750 |
| | 982 | (8 | ) | 974 | | | | | |
| | 5,274 | 65 | | 5,339 | | | | | |

(*) The bond is guaranteed by a fixed deposit recorded under non-current financial assets (euro 241 million).

Bonds due within 18 months amount to euro 435 million and concern Eni USA Inc (euro 255 million) and Eni Coordination Center SA (euro 180 million). During the 2005 Eni issued bonds for euro 441 million through Eni Coordination Center SA. Long-term debt and the current portion of long-term debt, including the weighted average interest rates, by currency, is as follows:

31.12.2004 (million euro ) Average rate 31.12.2005 (million euro ) Average rate

Euro	5,704	3.3	5,344	3.6
US dollar	1,476	6.4	1,709	7.0
British pound	1,082	6.1	1,082	5.3
Japanese
yen	96	1.4	153	1.4
Swiss franc	146	1.1	98	2.6
Other
currencies	30	8.7
	8,534		8,386

On 31 December 2005 Eni maintained committed unused lines of credit for euro 1,070 million (euro 710 million at 31 December 2004). These agreements provide for interest charges based on prevailing market conditions. Commission fees on unused lines of credit are not significant. Financial liabilities for euro 251 million are guaranteed by mortgages and liens on fixed assets of consolidated companies and by pledges on securities and fixed deposits (euro 274 million at 31 December 2004). Fair value of long-term debt, including the current portion of long-term debt, amounts to euro 8,466 million (euro 8,748 million at 31 December 2004) and was calculated by discounting the future cash flows using rates between 2.8% and 5% (2.4% and 5.2% at 31 December 2004).

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Net borrowings, as defined in the Financial Review in the Report of the Directors, consist of the following:

(million euro) 31.12.2004 31.12.2005

Current Non-current Total Current Non-current Total

| Short-term financial liabilities — Long-term
financial liabilities | 4,150 — 927 | | 7,607 | | 4,150 — 8,534 | | 4,612 — 733 | | 7,653 | | 4,612 — 8,386 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Cash and cash equivalent | (1,003 | ) | | | (1,003 | ) | (1,333 | ) | | | (1,333 | ) |
| Non-operating
securities | (792 | ) | (1 | ) | (793 | ) | (903 | ) | (28 | ) | (931 | ) |
| Non-operating financial receivables | (11 | ) | (240 | ) | (251 | ) | (12 | ) | (247 | ) | (259 | ) |
| Other | (194 | ) | | | (194 | ) | | | | | | |
| | 3,077 | | 7,366 | | 10,443 | | 3,097 | | 7,378 | | 10,475 | |

19 Reserves for contingencies and charges Reserves for contingencies and charges of euro 7,679 million (euro 5,736 million at 31 December 2004) consist of the following:

(million euro) Value at 31.12.2004 Additions Deductions Other changes Value at 31.12.2005

Site restoration and abandonment reserve	1,967	694	(108	)	95		2,648
Environmental
risks reserve	1,649	522	(157	)	89		2,103
Loss adjustments and actuarial reserves for
Enis insurance companies	573	100	(18	)	52		707
Contract
penalties and disputes reserve	208	359	(36	)	3		534
Revision of selling prices reserve		321					321
Tax
reserve	235	87	(38	)	25		309
Restructuring or decommissioning of production
facilities reserve	214	94	(113	)			195
OIL
insurance reserve	91	36					127
Reserve for losses related to investments	91	24	(3	)	(27	)	85
Onerous
contracts reserve		71	(6	)	15		80
Prize promotion reserve	63	52	(57	)	(6	)	52
Other (*)	645	264	(173	)	(218	)	518
	5,736	2,624	(709	)	28		7,679

(*) Each individual amount included herein does not exceed euro 50 million.

The site restoration and abandonment reserve of euro 2,648 million represents primarily the estimated costs for well-plugging, abandonment and site restoration (euro 2,613 million). The provisions of euro 694 million include the initial recognition and the reviews to the estimate of dismantling and restoration of sites recognized as a balancing entry to the asset to which they refers (euro 592 million) and financial expense due to the passage of time charged to the profit and loss account (euro 102 million); the discount rate used is included between 3% and 5.4%. Other changes of euro 95 million include exchange rate differences on the translation of financial statements prepared in currencies other than euro (euro 109 million). The environmental risks reserve of euro 2,103 million represents, primarily, the estimated costs of remediation in accordance with existing laws and regulations, of active production facilities for Syndial SpA (euro 1,445 million), the Refining & Marketing segment (euro 405 million), the Corporate and financial companies aggregate, relating to guarantees issued in relation to properties sold (euro 122 million) and the Gas & Power segment (euro 61 million). Provisions of euro 522 million primarily concern the Refining & Marketing segment (euro 282 million), Syndial SpA (euro 170 million) and the Corporate and financial companies aggregate (euro 50 million). The loss adjustment and actuarial reserves for Enis insurance companies of euro 707 million represents the liabilities accrued for claims on insurance policies underwritten by Enis captive insurance company. Deductions of euro 18 million concern deductions not corresponding to cash expenditures as regards to the reported accidents.

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Contract penalties and disputes reserve of euro 534 million is based on Enis best estimate of the expected probable liability. Provisions for euro 359 million primarily concern the fine imposed on 15 February 2006 by the Antitrust Authority to Eni (euro 290 million). Deductions of euro 36 million concern deductions not corresponding to cash expenditures for euro 23 million. The revision of selling prices reserve of euro 321 million primarily concern the provision for the estimated adverse impact of the application the Decision 248/2004 by the Italian Authority for Gas and Electricity from 1 January 2005 affecting the parameters for the upgrading of the raw material component in price formulas for end users (euro 225 million). The tax reserve of euro 309 million primarily includes charges for unsettled tax claims to uncertain application of the tax regulation for foreign companies of the Exploration & Production segment (euro 268 million). Deductions of euro 38 million concern deductions not corresponding to cash expenditures for euro 30 million. The restructuring or decommissioning of production facilities reserve of euro 195 million mainly represents the estimated costs related to divestments and facilities closures of the Refining & Marketing segment (euro 156 million). Deductions of euro 113 million concern deductions not corresponding to cash expenditures for euro 28 million. The OIL insurance reserve of euro 127 million includes the provision related to the increase of charges that will be paid in the next 5 years period, due by Eni for the participation in the mutual insurance of Oil Insurance Ltd, following to the greater number of accidents occurred in 2004 and 2005. The reserve for losses on investments of euro 85 million represents losses incurred to date in excess of the carrying value of investments (see Note 10). Onerous contracts reserve of euro 80 million concerns Syndial SpA and relates to contracts for which the termination or execution costs exceed the benefits arising from that contract. The prize promotion reserve of euro 52 million includes the provisions of the Refining & Marketing segment in relation to promotions directed towards the attainment of an increase on sales volumes on the Agip branded network and intended for station operators, for truckers and motorists that perform the fuel fill-up at the Isole Fai da Te. Deductions of other reserves of euro 173 million include deductions not corresponding to cash expenditures for euro 53 million, of which euro 27 million concern provisions for long-term construction contracts. Other changes of euro 28 million include exchange differences due to the translation of financial statements prepared in currencies other than euro of euro 159 million; such increase has been partially offset by reclassifications essentially to Social Projects and financial receivables (euro 140 million). 20 Provisions for employee benefits Provisions for employee benefits of Eni Group concern indemnities upon termination of employment, pension plans with benefits measured in consideration of the employees year compensation preceding the retirement and other long-term benefits. Provisions for indemnities upon termination of employment essentially concern the reserve for employee termination indemnities (TFR), regulated by article 2120 of the Italian Civil Code. The indemnity is paid out as capital and is determined by the total of the provisions set aside, calculated in consideration of the employees compensation during the service period, and revalued until the retirement. Provisions to TFR, considered for the determination of liabilities and costs, are net of the amounts paid to pension funds. Pension funds concern defined benefit plans of foreign companies located, primarily, in United Kingdom, Nigeria and Germany. Benefits consist of a return on capital determined on the basis of the length of service and the compensation paid in the last year of service or an average annual compensation paid in a determined period preceding the retirement. Other long-term benefits essentially concern the Supplementary medical reserve for Eni managers (FISDE) and jubilee awards. Liability and costs related to FISDE are calculated on the basis of the contributions paid by the company for the retired managers. Jubilee awards are benefits due following the attainment of a minimum period of service and, regarding to the Italian companies, they consist of a remuneration in kind.

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Current value of employee long-term benefits consist of the following:

Pension plans with plan assets

(million euro) TFR Gross liability Plan assets Net liability Other long-term benefit Total

| 31.12.2004 — Current
value of benefit obligation at beginning of year | 521 | | 483 | | (224 | ) | 259 | | 130 | | 910 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Current cost | 54 | | 17 | | | | 17 | | 3 | | 74 | |
| Interest
cost | 25 | | 25 | | | | 25 | | 6 | | 56 | |
| Expected return on plan assets | | | | | (14 | ) | (14 | ) | | | (14 | ) |
| Contributions
paid | | | 1 | | (21 | ) | (20 | ) | | | (20 | ) |
| Actuarial gains/losses | 29 | | 46 | | (7 | ) | 39 | | 8 | | 76 | |
| Benefits
paid | (52 | ) | (18 | ) | 11 | | (7 | ) | (9 | ) | (68 | ) |
| Amendments | | | 11 | | | | 11 | | | | 11 | |
| Exchange
rate differences and other changes | | | 11 | | (2 | ) | 9 | | | | 9 | |
| Current value of benefit obligation at
end of year | 577 | | 576 | | (257 | ) | 319 | | 138 | | 1.034 | |
| 31.12.2005 | | | | | | | | | | | | |
| Current value of benefit obligation at
beginning of year | 577 | | 576 | | (257 | ) | 319 | | 138 | | 1.034 | |
| Current
cost | 59 | | 18 | | | | 18 | | 5 | | 82 | |
| Interest cost | 25 | | 30 | | | | 30 | | 6 | | 61 | |
| Expected
return on plan assets | | | | | (16 | ) | (16 | ) | | | (16 | ) |
| Contributions paid | | | 1 | | (46 | ) | (45 | ) | | | (45 | ) |
| Actuarial
gains/losses | 47 | | 66 | | (24 | ) | 42 | | (6 | ) | 83 | |
| Benefits paid | (49 | ) | (19 | ) | 11 | | (8 | ) | (10 | ) | (67 | ) |
| Amendments | | | 3 | | | | 3 | | | | 3 | |
| Economic effect of curtailment or settlement of
the plan | (6 | ) | (5 | ) | | | (5 | ) | | | (11 | ) |
| Exchange
rate differences and other changes | | | 87 | | (27 | ) | 60 | | | | 60 | |
| Current value of benefit obligation at end of
year | 653 | | 757 | | (359 | ) | 398 | | 133 | | 1,184 | |

Current value of the obligation relating other long-term benefits of euro 133 million (euro 138 million at 31 December 2004) concern primarily FISDE for euro 96 million and jubilee awards for euro 29 million (euro 106 and 26 million at 31 December 2004, respectively). Current value of benefit obligation of pension plans with plan assets includes liabilities of joint ventures operating in exploration and production activities. Reconciliation of net liabilities for long-term benefits recorded in the balance sheets is as follows:

(million euro) TFR Pension plans with plan assets Other long-term benefit Total

31.12.2004 — Current value of the benefit obligation	577		319		138		1,034
Actuarial
gains/losses not recognized	(18	)	(16	)	(7	)	(41	)
Past service cost not recognized			(11	)			(11	)
Provisions
for employee benefits	559		292		131		982
31.12.2005
Current
value of the benefit obligation	653		398		133		1,184
Actuarial gains/losses not recognized	(76	)	(71	)	3		(144	)
Past
service cost not recognized			(9	)			(9	)
Provisions for employee benefits	577		318		136		1,031

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Fund for other long-term benefits of euro 136 million (euro 131 million at 31 December 2004) concern primarily FISDE for euro 99 million and jubilee awards for euro 29 million (euro 99 million and euro 26 million at 31 December 2004, respectively). Fund for employee benefits of pensions plan with plan assets includes liabilities of joint ventures operating in exploration and production activities for euro 95 and euro 130 million at 31 December 2004 and 2005, respectively; a receivable was recorded against such liability. Costs for long-term employee benefits recorded in the profit and loss account consist of the following:

(million euro) TFR Pension plans with plan assets Other long-term benefit Total

| 2004 — Current
cost | 54 | | 17 | | 3 | | 74 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Interest cost | 25 | | 25 | | 6 | | 56 | |
| Expected
return rate on plan assets | | | (14 | ) | | | (14 | ) |
| Amortization of past service cost | | | 1 | | | | 1 | |
| Amortization
of actuarial gains/losses | | | | | 1 | | 1 | |
| Total cost | 79 | | 29 | | 10 | | 118 | |
| 2005 | | | | | | | | |
| Current cost | 59 | | 18 | | 5 | | 82 | |
| Interest
cost | 25 | | 30 | | 6 | | 61 | |
| Expected return rate on plan assets | | | (16 | ) | | | (16 | ) |
| Amortization
of past service cost | | | 3 | | 1 | | 4 | |
| Amortization of actuarial gains/losses | | | | | 6 | | 6 | |
| Economic
effect of curtailment or settlement of the plan | (6 | ) | (4 | ) | (1 | ) | (11 | ) |
| Total cost | 78 | | 31 | | 17 | | 126 | |

Costs for other long-term benefits of euro 17 million (euro 10 million at 31 December 2004) concern FISDE for euro 7 million and jubilee awards for euro 7 million (euro 6 and 3 at 31 December 2004, respectively). Principal actuarial assumptions used for the valuation of long-term employee benefits consist of the following:

(%) TFR Pension plans with plan assets Other long-term benefit

2004
Principal actuarial assumptions
Discount
rate	4.0	5.0-8.0	4.0-6.0
Rate of compensation increase	2.7-4.5	3.0-6.8
Expected
return rate on plan assets		7.0
Rate of price inflation	2.0	2.0-4.6	2.0-2.3
2005
Principal actuarial assumptions
Discount
rate	4.5	4.7-7.9	4.5-6.0
Rate of compensation increase	2.7-4.5	3.0-6.8
Expected
return rate on plan assets		7.2
Rate of price inflation	2.3	2.0-4.9	2.0-2.3

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Plan assets consist of the following:

(%) Plan assets Expected return

31.12.2005 — Securities	50.2	7.4
Bonds	35.0	4.9
Investment property	1.7	8.1
Other	13.1	10.5
Total	100.0

21 Deferred tax liabilities Deferred tax liabilities of euro 4,890 million (euro 3,948 million at 31 December 2004) are net of deferred tax assets for which Eni possesses the legal right of offset.

(million euro) Value at 31.12.2004 Additions Deductions Exchange rate differences Other changes Value at 31.12.2005

3,948 2,136 (484 ) 331 (1,041 ) 4,890

Other changes of euro 1,041 million primarily concern the set-off, for each company, of tax assets and deferred tax liabilities (euro 1,035 million). Such change has been partially offset by provisions to the reserves of the shareholders equity following the first application of IAS 32 and 39 (euro 50 million) and valuation at fair value of financial instruments (euro 2 million). Deferred tax liabilities consist of the following:

(million euro) 31.12.2004 31.12.2005

| Deferred income taxes — Deferred
income taxes available to be offset | 6,002 — (2,054 | ) | 8,237 — (3,347 | ) |
| --- | --- | --- | --- | --- |
| | 3,948 | | 4,890 | |
| Deferred
income taxes not available to be offset | (1,827 | ) | (1,861 | ) |
| Net deferred tax liabilities | 2,121 | | 3,029 | |

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The most significant temporary differences giving rise to net deferred tax liabilities are as follows:

(million euro) Value at 31.12.2004 Additions Deductions Exchange rate differences Other changes Value at 31.12.2005

| Deferred tax liabilities: — -
accelerated tax depreciation on fixed assets | 3,885 | | 1,378 | | (235 | ) | 274 | | 553 | | 5,855 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| - application of the weighted average cost
method in evaluation of inventories | 300 | | 351 | | (2 | ) | | | | | 649 | |
| - site
restoration and abandonment costs | 104 | | 234 | | (35 | ) | 8 | | 38 | | 349 | |
| - capitalized interest expense | 219 | | 12 | | (12 | ) | | | 26 | | 245 | |
| - other | 1,494 | | 161 | | (200 | ) | 49 | | (365 | ) | 1,139 | |
| | 6,002 | | 2,136 | | (484 | ) | 331 | | 252 | | 8,237 | |
| Deferred
tax assets: | | | | | | | | | | | | |
| - accruals for doubtful accounts and reserve for
contingencies | (1,383 | ) | (842 | ) | 289 | | (37 | ) | 96 | | (1,877 | ) |
| - assets
revaluation as per Law 342/2000 and 448/2001 | (1,177 | ) | | | 79 | | | | 2 | | (1,096 | ) |
| - non deductible amortization | (324 | ) | (401 | ) | 178 | | (77 | ) | (244 | ) | (868 | ) |
| - tax loss
carryforwards | (102 | ) | (59 | ) | 58 | | (15 | ) | (42 | ) | (160 | ) |
| - other | (895 | ) | (476 | ) | 323 | | (29 | ) | (130 | ) | (1,207 | ) |
| | (3,881 | ) | (1,778 | ) | 927 | | (158 | ) | (318 | ) | (5,208 | ) |
| Net deferred tax liabilities | 2,121 | | 358 | | 443 | | 173 | | (66 | ) | 3,029 | |

Deferred tax assets are net of the valuation allowance of consolidated companies whose expected future fiscal profits are not considered sufficient for the utilization of these assets. No deferred tax liabilities have been recognized in relation to the reserves of consolidated subsidiaries because such reserves are not expected to be distributed (euro 269 million). Under the Italian fiscal laws, tax losses can be carried forward in the five subsequent periods, excepting losses suffered in the first three periods of life of the company that can be carried forward without limit. Tax losses of foreign companies can be carry forward on average for more than five periods and for a considerable part can be carried forward without limit. Tax recover correspond to a tax rate of 33% for Italian companies and to an average tax rate of 30% for foreign companies. Tax losses amount to euro 1,818 million and can be used in the following periods:

(million euro) Italian companies Foreign companies

2006		10
2007		7
2008	11	66
2009	8	43
2010		46
Over 2010		234
Without
limit		1,393
	19	1,799

Tax losses for which is expected the utilization amount to euro 547 million and essentially concern foreign companies (euro 536 million); the relevant deferred tax assets amount to euro 160 million, of which euro 158 million concern foreign companies.

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22 Other non-current liabilities Other non-current liabilities of euro 897 million (euro 427 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Income tax
liabilities | 23 | |
| --- | --- | --- |
| Other payables | 204 | 767 |
| Other
liabilities | 200 | 130 |
| | 427 | 897 |

Other payables of euro 767 million (euro 204 million at 31 December 2004) concern payables related to capital expenditures for euro 597 million. Other liabilities at 31 December 2004 of euro 200 million include the fair value of fixed interest rate financial liabilities of Lasmo Plc (now Eni Lasmo Plc) for euro 2 million. 23 Shareholders equity Minority interest Minority interest in profit and shareholders equity relate to the following consolidated subsidiaries:

(million euro) Net profit Shareholders equity

2004 2005 31.12.2004 31.12.2005

Snam Rete Gas SpA	331	321	2,025	1,158
Saipem SpA	133	115	846	915
Tigáz Tiszántúli GázszolgáltatÓ
Részvénytársaság	4	6	78	82
Others	14	17	217	194
	482	459	3,166	2,349

The decrease in the shareholders equity of Snam Rete Gas SpA of euro 867 million concern the distribution of an extraordinary dividend to the minority interest of euro 1,171 million. Eni shareholders equity

(million euro) Value at 31.12.2004 Value at 31.12.2005

| Share
capital — Legal reserve | 4,004 — 959 | | 4,005 — 959 | |
| --- | --- | --- | --- | --- |
| Cumulative
translation adjustment reserve | (687 | ) | 941 | |
| Reserve for treasury shares | 5,392 | | 5,345 | |
| Treasury
shares | (3,229 | ) | (4,216 | ) |
| Other reserves | 3,965 | | 5,351 | |
| Retained
earnings | 14,911 | | 17,381 | |
| Net profit for the period | 7,059 | | 8,788 | |
| Interim
dividend | | | (1,686 | ) |
| | 32,374 | | 36,868 | |

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Share capital At 31 December 2005 Eni SpA had 4,005,358,876 shares (nominal value euro 1 each) fully paid-up (4,004,424,476 shares at 31 December 2004). The increase concerns the issuing under the stock grant plan of 934,400 shares with a nominal value of euro 1 each subscribed by managers following the expiration of the plan issued in 2002 (883,300 shares) and the agreed termination of employment (51,100 shares). On 27 May 2005 Enis Shareholders Meeting decided a dividend distribution of euro 0.90 per share, with the exclusion of treasury shares. The cash dividend was made available for payment on 23 June 2005 and the ex-dividend date was 20 June 2005. Legal reserve The legal reserve of Eni SpA represents earnings restricted from the payment of dividends pursuant to Article 2430 of the Civil Code. Cumulative translation adjustment reserve The cumulative translation adjustment reserve represents exchange differences due to the translation of financial statements prepared in currencies other than euro. Reserve for treasury shares The reserve for treasury shares of euro 5,345 million (euro 5,392 million at 31 December 2004) contains earnings destined to purchase shares in accordance with the decisions of Enis Shareholders Meetings. The decrease of euro 47 million concern the sale and the grant of treasury shares to the Group managers following the stock option and stock grant plans. Treasury shares Treasury shares amount to euro 4,216 million (euro 3,229 million at 31 December 2004) and consist of 278,013,975 ordinary shares nominal value euro 1 owned by Eni SpA (234,394,888 ordinary shares nominal value euro 1 at 31 December 2004). Treasury shares of euro 237 million (euro 286 million at 31 December 2004), are represented by 17,428,300 shares (21,006,600 shares at 31 December 2004) and are destined to 2002-2004 and 2005 stock option plans (14,004,500 shares) and 2003-2005 stock grant plans (3,423,800 shares). The decrease of 3,578,300 shares consist of the following:

(million euro) Stock option Stock grant Total

| Number of shares at 31 December 2004 — -
reclassifications (*) | 14,574,000 — 2,658,400 | | 6,432,600 — (2,658,400 | ) | 21,006,600 | |
| --- | --- | --- | --- | --- | --- | --- |
| | 17,232,400 | | 3,774,200 | | 21,006,600 | |
| - rights
exercised | (3,106,400 | ) | (339,100 | ) | (3,445,500 | ) |
| - rights cancelled | (121,500 | ) | (11,300 | ) | (132,800 | ) |
| | (3,227,900 | ) | (350,400 | ) | (3,578,300 | ) |
| Number of shares at 31 December 2005 | 14,004,500 | | 3,423,800 | | 17,428,300 | |

(*) The reclassifications have been decided in accordance with the decision of Enis Shareholders Meeting of 27 May 2005.

At 31 December 2005 options and grants outstanding are 13,379,600 shares and 3,127,200 shares, respectively. Options refer to the 2002 stock plan for 903,100 shares with an exercise price of euro 15.216 per share, to the 2003 stock plan for 4,106,500 shares with an exercise price of euro 13.743 per share, to the 2004 stock plan for 3,659,000 shares with an exercise price of euro 16.576 per share and to the 2005 stock plan for 4,711,000 shares with an exercise price of euro 22.512 per share. Information about stock grant and stock option plans is included in the paragraph Incentive plans for Eni managers with Eni stock, section Other information of the Report of the Directors which is considered an integral part of these Notes. Other reserves Other reserves of euro 5,351 million (euro 3,965 million at 31 December 2004) refer to Eni distributable reserve for euro 5,219 million (euro 3,896 million at 31 December 2004). The increase of euro 1,386 million primarily concern the destination of the residual income for 2004 (euro 1,300 million), in accordance with the decisions of Enis Shareholders Meetings of 27 May 2005.

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Interim dividend Interim dividend of euro 1,686 million concern the interim dividend of the year 2005 for euro 0.45 per share, with the exclusion of treasury shares, as decided by Enis Shareholders Meetings in accordance with article 2433-bis, paragraph 5 of the Italian Civil Code; the dividend was paid on 27 October 2005. Distributable reserves At 31 December 2005 Eni shareholders equity approximately includes distributable reserves for euro 28,900 million, a portion of which is subjected to taxation upon distribution. Deferred tax liabilities have been recorded in relation to the reserves expected to be distributed (euro 32 million). Reconciliation of statutory net profit and shareholders equity to consolidated net profit and shareholders equity

(million euro) Net profit Shareholders equity

2004 2005 31.12.2004 31.12.2005

| As
recorded in Eni SpAs financial statements — Treasury shares | 4,684 | | 5,288 | | 29,433 — (3,229 | ) | 29,656 — (4,216 | ) |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Difference
between the equity value and result of consolidated
companies and the equity value and result of consolidated
companies as accounted for in Eni SpA financial
statements | 4,444 | | 2,718 | | 9,470 | | 13,483 | |
| Consolidation adjustments: | | | | | | | | |
| -
difference between cost and underlying value of equity | (112 | ) | (44 | ) | 2,592 | | 2,558 | |
| - elimination of tax adjustments and compliance
with accounting policies | (2,197 | ) | 1,617 | | (244 | ) | 313 | |
| -
elimination of unrealized intercompany profits | (235 | ) | (40 | ) | (2,498 | ) | (2,677 | ) |
| - deferred taxation | 612 | | (313 | ) | (133 | ) | 2 | |
| - other
adjustments | 345 | | 21 | | 149 | | 98 | |
| | 7,541 | | 9,247 | | 35,540 | | 39,217 | |
| Minority
interest | (482 | ) | (459 | ) | (3,166 | ) | (2,349 | ) |
| As recorded in consolidated financial
statements | 7,059 | | 8,788 | | 32,374 | | 36,868 | |

24 Guarantees, commitments and risks Guarantees Guarantees of euro 22,294 million (euro 19,066 million at 31 December 2004) consist of the following:

31.12.2004 31.12.2005

(million euro) Unsecured guarantees Other guarantees Secured guarantees Total Unsecured guarantees Other guarantees Secured guarantees Total

| Consolidated companies — Unconsolidated
subsidiaries | 7 | 3,228 — 532 | | 3,228 — 539 | 4 | 5,839 — 203 | | 5,839 — 207 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Affiliated companies and Joint Ventures | 4,901 | 1,922 | 40 | 6,863 | 4,900 | 1,772 | 40 | 6,712 |
| Others | 70 | 169 | | 239 | 64 | 40 | | 104 |
| | 4,978 | 5,851 | 40 | 10,869 | 4,968 | 7,854 | 40 | 12,862 |

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Guarantees given on behalf of consolidated companies of euro 5,839 million (euro 3,228 million at 31 December 2004) consist primarily of: (i) guarantees given to third parties relating to bid bonds and performance bonds for euro 3,057 million (euro 2,929 million at 31 December 2004), of which euro 2,397 million related to the Oilfield Services Construction and Engineering segment (euro 2,296 million at 31 December 2004); (ii) VAT recoverable from tax authorities for euro 1,386 million (euro 1,156 million at 31 December 2004); (iii) insurance risk for euro 298 million reinsured by Eni (euro 396 million at 31 December 2004). At 31 December 2005 the underlying commitment covered by such guarantees was euro 5,491 million (euro 4,521 million at 31 December 2004). Unsecured guarantees, other guarantees and secured guarantees given on behalf of unconsolidated subsidiaries of euro 207 million (euro 539 million at 31 December 2004) consisted of unsecured guarantees and letters of patronage given to commissioning entities relating to bid bonds and performance bonds for euro 165 million (euro 144 million at 31 December 2004). The decrease of euro 332 million essentially concern the reclassification to consolidated subsidiaries of the guarantees given on behalf of Eni Middle East BV (euro 367 million at 31 December 2004). At 31 December 2005, the underlying commitment covered by such guarantees was euro 145 million (euro 467 million at 31 December 2004). Unsecured guarantees, other guarantees and secured guarantees given on behalf of joint ventures and affiliated companies of euro 6,712 million (euro 6,863 million at 31 December 2004) primarily concern: (i) a guarantee of euro 4,894 million (the same amount as of 31 December 2004) given by Eni SpA to Treno Alta Velocità - TAV - SpA for the proper and timely completion of a project relating to the Milano-Bologna train link by the Consorzio Eni per lAlta Velocità - Cepav Uno (Eni 50.4%); consortium members, excluding unconsolidated subsidiaries, gave Eni liability of surety letters and bank guarantees amounting to 10% of their respective portion of the work; (ii) unsecured guarantees, letters of patronage and other given to banks in relation to loans and lines of credit received for euro 1,360 million (euro 1,633 million at 31 December 2004), of which euro 844 million related to a contract released by Snam SpA (now merged into Eni SpA) on behalf of Blue Stream Pipeline Co BV (Eni 50%) to a consortium of financing institutions (euro 731 million at 31 December 2004). The decrease of euro 273 million primarily concerns to the extinguishment of a guarantee of euro 250 million given on behalf of EnBW - Eni Verwaltungsgesellschaft mbH (Eni 50%) and Albacom SpA (euro 88 million), partially offset by the increase of the guarantee given on behalf of Blue Stream Pipeline Co BV (euro 113 million); (iii) unsecured guarantees, letters of patronage and other given to commissioning entities relating to bid bonds and performance bonds for euro 274 million (euro 118 million at 31 December 2004). The increase of euro 156 million essentially regarded guarantees on behalf of the Oilfield Services Construction and Engineering segment; (iv) performance guarantees of euro 62 million given on behalf of UniÓn Fenosa SA and UniÓn Fenosa Gas SA (Eni 50%) in relation to contractual commitments related to the results of operations of subsidiaries of UniÓn Fenosa Gas SA (euro 111 million at 31 December 2004); (v) secured guarantees of euro 40 million (the same amount as of 31 December 2004), relate to mortgages, liens and privileges granted to banks in connection with loans. At 31 December 2005, the underlying commitment covered by such guarantees was euro 2,938 million (euro 3,500 million at 31 December 2004). Other guarantees given on behalf of third parties of euro 104 million (euro 239 million at 31 December 2004) consist primarily of guarantees given by Eni SpA to banks and other financing institutions in relation to loans and lines of credit for euro 92 million on behalf of minor investments or companies sold (euro 160 million at 31 December 2004). At 31 December 2005 the underlying commitment covered by such guarantees was euro 75 million (euro 103 million at 31 December 2004).

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Commitments and contingencies Commitments and contingencies euro 1,655 million (euro 1,620 million at 31 December 2004) consist of the following:

(million euro) 31.12.2004 31.12.2005

| Commitments — Purchase
of assets | 200 | 219 |
| --- | --- | --- |
| Sale of assets | 124 | |
| Other | 319 | 220 |
| | 643 | 439 |
| Risks | 977 | 1,216 |
| | 1,620 | 1,655 |

Obligations for purchases and sales of assets of euro 219 million (euro 324 million at 31 December 2004) concern securities for euro 116 million (euro 183 million at 31 December 2004) and investments for euro 103 million (euro 141 million at 31 December 2004). Obligations relating to marketable securities concern the placement on the market of securities managed by Sofid Sim SpA. This company sold Italian Government bonds to investors, primarily employees, and simultaneously entered into interest rate swaps with such investors wherein it receives the rate of interest on such Italian Government bonds and pays a floating rate of interest linked to Euribor. Such investors may sell their securities back to Sofid Sim SpA at any time at par value plus related interest with the simultaneous cancellation of the related swaps. Against the commitment related to interest rate swaps Sofid Sim SpA entered into derivatives for which Sofid Sim SpA receives a variable rate more profitable than the one renown by the shareholders. The operation ended on 1 January 2006 following the expiry of the government bonds. The decrease in obligations related to investments of euro 38 million primarily concerns the exercise by Erg SpA of a call option for the purchase of a 28% shares of Erg Raffinerie Mediterranee SpA (euro 100 million) and the expiry of obligations for purchases and sales of the shares of Nuovo Pignone SpA following the sale of the investment (euro 31 million); such decrease was partially offset by the obligation assumed by Eni SpA related to the acquisition from ESPI - Ente Siciliano per la Promozione Industriale (in liquidation) of 50% of the capital share of Siciliana Gas SpA and 1 share of Siciliana Gas Vendite SpA (euro 98 million). Other commitments of euro 220 million (euro 319 million at 31 December 2004) are essentially related to a memorandum of intent signed with the Basilicata Region, whereby Eni has agreed to invest, also on account of Shell Italia E&P SpA, euro 193 million in the future in connection with Enis development plan of oil fields in Val dAgri (euro 206 million at 31 December 2004). The agreements between Syndial SpA and various government entities, employee and trade groups whereby Syndial SpA in order to further develop the chemical segment and protect the environment with respect to the Porto Marghera plant of euro 90 million at 31 December 2004, expired following the subscription of a new agreement that determined a provision in the reserves for contingencies. Risks of euro 1,216 million (euro 977 million at 31 December 2004) primarily concern potential risks associated with the value of assets of third parties under the custody of Eni for euro 794 million (euro 551 million at 31 December 2004) and contractual assurances given to acquirors of certain investments and businesses of Eni for euro 402 million (euro 406 million at 31 December 2004). Management of risks FOREWORD The main risks identified and managed by Eni are the following: (i) market risks deriving from the exposure to the fluctuations of interest rates, of exchange rates between the euro and the US dollar and the other currencies used by the company, as wells as the volatility of commodity prices; (ii) the credit risk deriving from the possible default of a counterparty; (iii) the liquidity risk deriving from the lack of financial resources to face short time commitments; (iv) the operation risk deriving from the occurrence of accidents, malfunctioning, failures with damage to persons and the environment affecting operating and financial results; (v) country risk in oil & gas activities.

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MARKET RISK Market risks include exchange rate risk, interest rate risk, commodity risk. Their management follows a set of guidelines and procedures that concentrate the treasury function in two captive finance companies operating in the Italian and international financial markets. In particular, the financial company operating on the domestic market (Enifin) manages all the transactions concerning currency exchange and derivatives. The risk of commodity prices is managed by each business unit while Enifin manages the negotiation of hedging derivatives. In order to minimize market risk related to changes in interest rates, exchange rates and commodity prices, Eni enters into financial and commodity hedging contracts for the purpose of reducing its exposure to market risk. Eni does not enter into derivative transactions on a speculative basis. Enis Board of Directors has defined a policy that requires the Treasury Department of Eni SpA to determine the maximum level of foreign exchange rate and interest rate risks that can be assumed by Enis finance companies. Such policy also defines the eligible counterparties in derivative transactions. Enis Treasury Department is responsible for monitoring compliance with Enis policy, as well as the correlation between the indicators adopted for measuring of the tolerable risk level, the portfolio of financial instruments and market conditions. Enis operating subsidiaries are required to reduce foreign exchange rate risk to a minimum level by coordinating their operations with such finance companies. As far as interest rate and foreign exchange rate risks are concerned, the calculation and measurement techniques followed by Enis finance companies are in accordance with established banking standards (such standards are established by the Basel Committee). However, the tolerable level of risk adopted by such companies is more conservative than that defined by the Basel Committee. Enis guidelines for the management of commodity risk contain maximum limits to the price risk deriving from trading activities. Directions in this area are entrusted to a commodity risk assessment team, while the treasury department controls the respect of said limits and the development and updating of methodologies followed. EXCHANGE RATE RISK Exchange rate risk derives from the fact that Enis operations are conducted in currencies other than the euro (in particular the US dollar) and by the time lag existing between the recording of costs and revenues denominated in currencies other than the functional currency and their realization (transaction exchange rate risk). An appreciation of the US dollar versus the euro generally has a positive impact on Enis results of operations. INTEREST RATE RISK Variations in interest rates affect the market value of assets and liabilities of the company and its net borrowings. COMMODITY RISK Enis results of operations are affected by changes in the prices of products and services sold. A decrease in oil prices generally has a negative impact on Enis results of operations and vice versa. CREDIT RISK Credit risk is the potential exposure of the Group to loss in the event of non-performance by a counterparty. The credit risk arising from the Groups normal commercial operations is controlled by individual operating units within Group-approved guidelines. Enis financial companies follow guidelines approved by Enis treasury department on the choice of highly credit-rated counterparties in their use of financial and commodity instruments, including derivatives. Eni has not experienced material non-performance by any counterparty. As of 31 December 2005 Eni has no significant concentrations at credit risk. LIQUIDITY RISK Liquidity risk is the risk that suitable sources of funding for the Groups business activities may not be available. The Group has access to a wide range of funding at competitive rates through the capital markets and banks. The Group believes it has access to sufficient funding and has also both committed and uncommitted borrowing facilities to meet currently foreseeable borrowing requirements. OPERATION RISKS Enis activities present industrial and environmental risks and are therefore subject to extensive government regulations concerning environmental protection and industrial security in most countries. For example, in Europe, Eni operates industrial

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plants such as refineries and petrochemical complexes that meet the criteria of the European Union Seveso II directive for classification as high risk sites. The broad scope of Enis activities involves a wide range of operational risks such as those of explosion, fire or leakage of toxic products, production of non biodegradable waste. All these events could possibly damage or even destroy wells as well as related equipment and other property, cause injury or even death to persons or cause environmental damage. In addition, since exploration and production activities may take place on sites that are ecologically sensitive (tropical forest, marine environment, etc.), each site requires a specific approach to minimize the impact on the related ecosystem, biodiversity and human health. Eni adopted the most stringent standards for the evaluation and management of industrial and environmental risks, complying with local and international rules and standards. Business units evaluate through specific procedures the related industrial and environmental risks in addition to taking account the regulatory requirements of the countries where these activities are located. Since 2003, Eni has introduced a Model of management system, a general procedure to be applied in all its operating sites, based on an annual cycle of planning, implementation, control, review of results and definition of new objectives. The model is directed towards the prevention of risks, the systematic monitoring and control of HSE performance in a continuous improvement cycle subject also to audits by internal and independent experts. At 31 December 2005 six system audits had been performed and four are planned for 2006. Any environmental emergency is managed by business units locally with their own organization under preset reaction plans to foreseeable events aimed at limiting damage and at activating adequate responses. Eni has two emergency rooms (at Milan and Rome) provided with real time monitoring systems for the collection of data on georeferenced maps for all Eni sites and logistics worldwide. In addition to its own emergency teams, Eni entered agreements with international agencies in order to maximize its ability to react in all its operating sites. At year-end 2005 Eni employed over 2,000 full time equivalent employees in HSE activities, prevention of environmental risk, safety and health. COUNTRY RISK Substantial portions of Enis hydrocarbons reserves are located in countries outside the EU and North America, certain of which may be politically or economically less stable than EU or North American countries. At 31 December 2005, approximately 73% of Enis proved hydrocarbons reserves were located in such countries. Similarly, a substantial portion of Enis natural gas supply comes from countries outside the EU and North America. In 2005, approximately 60% of Enis domestic supply of natural gas came from such countries. Negative developments in the economic and political framework of these countries can compromise temporarily or permanently Enis ability to operate economically and to have access to said reserves. Eni monitors constantly the political, social and economic risk of the approximately 100 countries where it invested or intends to invest with special attention to the evaluation of upstream investments. Country risks are mitigated by means of appropriate guidelines for risk management that Eni defined in its procedure for project risk assessment and management. Legal proceedings Eni is a party to a number of civil actions and administrative proceedings arising in the ordinary course of business. Based on information available to date, and taking account of the existing risk reserves, Eni believes that the foregoing will not have an adverse effect on Enis consolidated financial statements. Following is a description of the most significant proceedings currently pending; unless otherwise indicated below, no provisions have been made for these legal proceedings as Eni believes that negative outcomes are not probable or because the amount of the provision can not be estimated reliably. Environment ENI SPA In 1999, the public prosecutor of Gela started an investigation in order to ascertain alleged soil and sea pollution caused by the discharge of pollutants by Enis Gela refinery. In November 2002, Italia Nostra and the association Amici della Terra filed civil claims related to this proceeding and requested the payment of damage claims for a total of euro 15,050 million. In July 2003, the

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relevant Court decided for the transmission of the inquiries to the public prosecutor, recognizing a violation of Article 440 of the penal code (water and food substances corruption). Three environmental organizations act as plaintiffs and requested damage payment for euro 551 million. Two of these organizations are acting also against the Gela refinery. In 2000, the public prosecutor of Gela started an investigation on alleged prohibited emissions from the refinery of Gela, which are purported to have had negative effects on the health of a number of citizens of Gela, and on a lack of declaration of such emissions in violation of Presidential Decree No. 203 of 1988. The investigation ended with an action for events occurred from 1997. The Municipality of Gela, the Province of Caltanissetta and others filed civil claims in this proceeding and requested the payment of compensatory damages for a total of euro 878 million. The judgment of first degree before the Court of Gela is pending. In 2002, the public prosecutor of Gela started an investigation in order to ascertain alleged pollution caused by emissions of the Gela plant, owned by Polimeri Europa SpA, Syndial SpA (former EniChem SpA) and Raffineria di Gela SpA. Some local public entities, environmental NGOs and landowners will act as plaintiffs. On 17 January 2005, a second inquiry phase aimed at ascertaining which sort of emissions had eventually produced the alleged pollution caused by the refinery of Gela, was completed. On 3 February 2006 the parties were informed of the conclusion of the preliminary inquiry. In June 2002, in connection with a fire in the refinery of Gela, a penal investigation began concerning arson, environmental crimes and crimes against natural heritage. On 12 May 2004 the first hearing was held for an immediate decision. In 2002, the public prosecutor of Gela started a penal investigation concerning the refinery of Gela to ascertain the quality of ground water in the area of the refinery. The investigation concerns the environmental rules about the pollution of water and soil and illegal disposal of liquid and solid waste materials. On 7 November 2003 the judge for preliminary investigations accepted to continue the inquiries as requested by the public prosecutor to ascertain the state of the refinerys storage tanks and the presence of infiltrations of refinery products into the deep water-bearing stratum, due to a breakage in some tanks. With a decision of 3 November 2003, the Court for preliminary investigation, in agreement with a request of the public prosecutor of Gela, had already ordered the preventive seizure of 92 storage tanks, later reopened except for 9 tanks that remained under seizure but do not prevent full operations at the refinery. The report filed by experts of the public prosecutor is currently under scrutiny. In March 2002 the public prosecutor of Siracusa started an investigation concerning the activity of the refinery of Priolo for intentional pollution of water used for human consumption and requested a technical opinion, not yet concluded, to ascertain alleged infiltrations of refinery products into the deep water-bearing stratum used for human consumption purposes in the Priolo area. The proceeding is still in the preliminary investigation phase. A qualified company has been given the task to verify the cause, the origin and the extension of the alleged infiltration. For protective purposes, actions have been taken to: (i) create safety measures and clean-up all of the polluted area; (ii) reallocate wells for drinking water in an area farther from and higher than the industrial site; and (iii) install a purification system for drinkable water. With a decision of 1 June 2004 the seizure was lifted on the storage tanks that had been seized on 17 April 2003, except for five storage tanks that are still under seizure. The report of experts has been deposited, after this the defendants can file opposition. In relation to the investigations concerning a subsidence phenomenon allegedly caused by hydrocarbon exploration, on 21 May 2004, following the decision of the Court of Rovigo, the Nucleo Operativo Ecologico dei Carabinieri of Venice placed under preliminary seizure the Dosso degli Angeli, Angela/Angelina - Ravenna Mare Sud fields and the related wells and platforms. On 10 June 2004 the Court responded to the claim filed by Eni and lifted the seizure of the Angela/Angelina - Ravenna Mare Sud fields and related wells and platforms. On 10 March 2005, the Court of Cassation confirmed this decision. On 5 February 2003, a seizure had already been applied to the Naomi/Pandora platform, the Naomi 4 Dir, Naomi 2 Dir and 3 Dir - Pandora 2 Dir wells, and the underwater pipeline for the transportation of gas to the Casalborsetti facility. Eni believes it has always acted in full compliance with existing laws under the required authorizations. Taking account of the observations of the consultants of the Court of Rovigo on which the Public Prosecutor based his case, Eni constituted an independent and interdisciplinary scientific commission, chaired by Prof. Enzo Boschi, professor of seismology at the Università degli Studi di Bologna and chairman of the Istituto nazionale di geofisica e vulcanologia, composed of prominent and highly qualified international experts of subsidence caused by hydrocarbon exploration, with the aim of verifying the size and the effects and any appropriate actions to reduce or to neutralize any subsidence phenomenon in the Ravenna and North Adriatic area both on land and in the sea. The commission produced a study which denies the possibility for any risk for human health and for damage to the environment. It also states that no example is known anywhere in the world of accidents that caused harm to the public safety caused by subsidence induced by hydrocarbon

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production. The study also shows that Eni employs the most advanced techniques for the monitoring, measuring and control of the soil. The action is being carried out. The Veneto region and the Province of Ravenna will act as plaintiffs. ENIPOWER SPA In autumn 2004 the Public Prosecutor of Rovigo started an investigation for alleged crimes related to unauthorized waste management activities in Loreo relating to samples of the soil used in the construction of the new EniPowers power station in Mantova. On 11 November 2005 EniPower requested the closing of the investigation. POLIMERI EUROPA SPA Before the Court of Gela two criminal actions took place, one in relation to the activity of the F3001 furnace and the other concerning the ACN plant (disposal of FOK residue). In both cases the accused were found guilty. Eni appealed the Courts decision. For the proceeding concerning the F3001 furnace the sentence was passed to the civil court for the quantification of the damage to be paid to the Caltanissetta Province. SYNDIAL SPA (FORMER ENICHEM SPA) In 1992, the Ministry of Environment summoned EniChem SpA and Montecatini SpA before the Court of Brescia. The Ministry requested, primarily, to require environmental remediation for the alleged pollution caused by the Mantova plant from 1976 until 1990, and provisionally, in case there was no possibility to remediate, require them to pay environmental damages. The amount is going to be determined during the proceeding, but it will not be lower than euro 136 million, or determined by the judge as compensatory liquidation. EniChem acquired the Mantova plant in June 1989, as part of the Enimont deal. Edison SpA must hold Eni harmless or pay compensatory damage for any damage caused to third parties by plant operations before Montedisons sale, even if the damage occurred later. Edison agreed on a settlement that quantified damage to be paid covering also Syndial. The proceeding continues for the alleged damage in the 1989-1990 period. In 1997, an action was commenced before the Court of Venice concerning the criminal charges brought by the Venice public prosecutor for alleged mismanagement of the Porto Marghera plant starting in the 1970s until 1995 and for the alleged pollution and health damage resulting therefrom. On 2 November 2001 the Court of Venice acquitted all defendants. The appeal against the decision was presented by the public prosecutor, the State Attorney on behalf of the Ministry of Environment and the Council of Ministers, 5 public entities, 12 associations and other entities and 48 individual persons. On 15 December 2004 the Venice Court of Appeals confirmed the preceding judgment, changing only some marginal parts. As concerns some defendants of Eni and Syndial, the Court of Appeals decided not to proceed due to the statute of limitations for some crimes, while it confirmed the preceding judgment for the other matters. All plaintiffs appealed this decision before the court of final instance. In January 2006 Eni and Syndial reached a settlement agreement with the Council of Ministers and the Ministry for the Environment under which after the payment of euro 40 million the latter will abstain from the recourse to the Court of final instance and will not act on any other environmental damage concerning the management of Porto Marghera until the date of the settlement. Eni had already recorded a provision to the risk reserve for this matter. In 2000, the Public Prosecutor of Brindisi started a criminal action against 68 persons who are employees or former employees of companies that owned and managed plants for the manufacture of dichloroethane, vinyl chloride monomer and vinyl polychloride from the early 1960s to date, some of which were managed by EniChem from 1983 to 1993. At the end of the preliminary investigation phase, the Public Prosecutor asked the dismissal of the case in respect of the employees and the managers of EniChem. Plaintiffs presented oppositions while the prosecutor confirmed his request for dismissal of the case. On 18 December 2002 EniChem SpA, jointly with Ambiente SpA (now merged in Syndial SpA) and European Vinyls Corporation Italia SpA, was summoned before the Court of Venice by the Province of Venice. The province requested compensation for environmental damages, not quantified, caused to the lagoon of Venice by the Porto Marghera plants, which were already the subject of two previous proceedings against employees and managers. In a related action, European Vinyls Corporation Italia presented an action for recourse against EniChem and Ambiente. The requests for damage of the Province of Venice and that of EVC Italia to EniChem and Ambiente have not been quantified. The final judgment is pending. On 16 January 2003 the Court of Siracusa issued personal cautionary measures against some employees of EniChem SpA and Polimeri Europa SpA. They are accused of illicit management relating to the production, disposal and treatment of liquid and solid waste materials and of obtaining illicit income. Polimeri Europa and EniChem, will act as plaintiffs. The collection of evidence

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effected before the hearing starts in Court has been concluded and preliminary investigations have ended with the confirmation of accusations. During the inquiries traces of mercury were found in the sea. The Public Prosecutor of Siracusa started an inquiry for ascertaining the conditions of sediments and marine fauna in the bay of Augusta. According to the plaintiffs, mercury would have been spilled into the sea and poisoned the marine fauna and therefore fetal malformations and abortions due to the consumption of contaminated seafood fished in this area. The chlorine soda plant, built in the late 50s was conferred to Syndial in 1989 when the Enimont joint venture was formed. It was therefore easy to prove that Eni holds no responsibility for the crimes it was accused of. On 15 March 2006 the judge for preliminary investigations decided the dismissal of the case against Syndial employees. On 14 April 2003 the President of the Regional Council of Calabria, as Delegated Commissioner for Environmental Emergency in the Calabria Region, started an action against EniChem SpA related to environmental damages for about euro 129 million and to financial and non-financial damages for euro 250 million (plus interest and compensation) allegedly caused by Pertusola Sud SpA (merged into EniChem) in the area of Crotone. On 6 June 2003 EniChem appeared before the court and requested the rejection of the damages and, as counterclaim, the payment of the total costs for the remediation works already underway. The Province of Crotone entered the proceeding, claiming environmental damages for euro 300 million. Technical aspects concerning the role of the delegated commissioner make it necessary to decide on this aspect. Syndial was notified on 21 October 2004 of the request of the Calabria Region to appear before the Court of Milan in order to obtain a preliminary damage payment, in anticipation of the expiration of the special office for managing emergency events in Calabria. The Region requested payments for over euro 800 million. The hearing is set on 30 March 2006. On 28 February 2006 the Council of Ministers, the Ministry for the Environment and the Delegated Commissioner for environmental emergency in the Calabria Region represented by the State Lawyer requested Syndial to appear before the Court of Milan in order to obtain the ascertainment, quantification and payment of damage (in the form of pollution of land, air and water and therefore of the general condition of the population) caused by the operations of Pertusola Sud SpA in the municipality of Crotone and in surrounding municipalities. The local authorities request the ascertainment of Syndials responsibility as concerns expenses borne and to be borne for the cleanup and reclamation of sites, currently quantified at euro 129 million. This proceeding concerns the same company and damages as indicated in the previous two paragraphs. In March 2004, Sitindustrie SpA, which in 1996 purchased a plant in Paderno Dugnano from Enirisorse (now merged into Syndial SpA), summoned Syndial SpA before the Court of Milan, requesting to establish the responsibility of Syndial SpA in the alleged pollution of soils around the plant and to require it to pay environmental damages necessary for remediation. Syndial opposed the claim based on an absence of the right of action of the plaintiff. The judge has not yet decided on Syndials opposition. A hearing for presenting the conclusions has been set on 5 April 2006. In October 2004, Sitindustrie SpA started an analogous proceeding against Syndial concerning the plant for the manufacture of products in copper and copper alloy at Pieve Vergonte. The next hearing has been scheduled for 5 April 2006. In May 2003 the Minister of the Environment summoned Syndial SpA before the Court of Turin and requested environmental damages for euro 2,396 million in relation to alleged DDT pollution in the Lake Maggiore caused by the Pieve Vergonte plant. On 1 March 2006 the State Lawyer in an attempt to settle the case proposed that Syndial pay 10% of the requested damage corresponding to euro 239 million. The municipality of Carrara started an action at the Court of Genova requesting to Syndial SpA the remediation and reestablishment of the previous environmental conditions at the Avenza site and the payment of environmental damage. This request is related to an accident occurred in 1984, as a consequence of which EniChem Agricoltura SpA (later merged into Syndial SpA), at the time owner of the site, had carried out safety and remediation works. The Ministry of the Environment joined the action and requested the environmental damage payment from a minimum of euro 53.5 million to a maximum of euro 78.5 million to be broken down among the various companies that managed the plant in the past. Previous managers include Syndial, called into the action as a guarantor, Rumianca SpA, Sir Finanziaria SpA and Sogemo SpA. The judge requested an expert report to be prepared in order to ascertain what damage has been remediated and what remains to be cleaned up after the interventions started by Agricoltura and continued by EniChem/Syndial. The expert report quantifies the damage still to be remediated in euro 15 million. The proceeding needs to be assigned to another judge as the preceding ones duties expired.

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Tax Proceedings ENI SPA With a decree dated 6 December 2000 the Lombardia Region decided that natural gas used for electricity generation is subject to an additional regional excise tax in relation to which Snam SpA (merged into Eni SpA in 2002) should substitute for the tax authorities in its collection from customers. Given interpretive uncertainties, the same decree provides the terms within which distributing companies are expected to pay this excise tax without paying any penalty. Snam SpA and the other distributing companies of Eni believe that natural gas used for electricity generation is not subject to this additional excise tax. For this reason, an official interpretation has been requested from the Ministry of Finance and Economy. With a decision of 29 May 2001, the Ministry confirmed that this additional excise tax cannot be applied. The Region decided not to revoke its decree and Snam took appropriate legal action. On the basis of action carried out by Snam, the Council of State decided on 18 March 2002 that the jurisdiction of the Administrative court did not apply to this case. In case the Region should request payment, Eni will challenge this request in the relevant Court. The Lombardia Region decided with regional Law No. 27/2001 that no additional tax is due from 1 January 2002 onwards, but still requested the payment of the additional taxes due before that date. The statute of limitations applies after a period of five years, it will therefore be possible to further the claims until 16 July 2007. During 2003, the Customs District of Taranto sent 147 formal assessments and amendments to bills of entry for finished products and goods and semi finished products produced by Enis Taranto refinery in 2000, 2001 and 2002 to Eni SpA, as the successor entity of AgipPetroli SpA following its merger into Eni. The notification regards about euro 24 million of customs duties not paid by the company because the imported products were not yet finished goods, but were destined to processing, for which ordinary customs tariffs allow exemption. The formal assessment did not contain the determination of any administrative penalties provided for by customs rules. The penalty can be from one to ten times the amount of taxes not paid. The notification was based on the fact that the company did not have the administrative authorization to utilize the customs exemption. The company, believing it acted properly pursuant to Circular 20/D/2003, started a proceeding for an administrative resolution, according to the customs rules. The company asked the Regional Director of Customs of Puglia for the annulment of the received assessments as a measure of self-protection. With a decision of 26 November 2004 the Regional Director accepted Enis appeal and ended the litigation by cancelling the 147 formal assessments. On 12 March 2004 the Comando Nucleo Regionale Polizia Tributaria Puglia notified a verbal action of observation to the company. In this action there is an alleged offense of smuggling and falsification of accounts for the same imports, already subjected to the previous assessments of the Customs District of Taranto and other occurrences between January 1999 and February 2003. The verbal action made by a Fiscal Officer, sent to the Public Prosecutor in the Court of Taranto, reclaims the omitted payment of customs for about euro 26 million. The notification was based on the same lack of administrative authorization, already contested by the Customs District of Taranto, that was concluded in favor of Eni by the Regional Director. On 26 January 2006 the judge for preliminary investigation of the Court of Taranto dismissed the accusations and closed the assessment. With a formal assessment presented by the municipality of Pineto (Teramo) Eni SpA has been accused of not having paid a municipal tax on real estate for the period from 1993 to 1998 on four oil platforms located in the Adriatic Sea territorial waters in front of the coast of Pineto. Eni has been requested to pay a total of approximately euro 17 million also including interest and a fine for lacking declaration. Eni filed a claim against this request stating that the sea where the platforms are located is not part of the municipal territory and the application of the tax at requested by the municipality lacked objective fundamentals. The claim has been accepted in the first two degrees of judgment at the Provincial and Regional Tax Commissions. But the Court of Cassation cancelled both judgments declaring that a municipality can consider requesting a tax on real estate also in the sea facing its territory and with a decision of 21 February 2005 sent the proceeding to another section of the Regional Tax Commission in order to judge on the other reason opposed by Eni. On 28 December 2005 the municipality of Pineto presented the same request for the same platforms for the years 1999 to 2004. The total amount requested to Eni is of euro 24 million. Eni intends to file a claim against this request. ENI DACIÓN BV In August 2005, the internal revenue service of Venezuela served to Eni DaciÓn BV four formal assessment on income taxes for the years 2001 to 2004 that, by excluding the deductibility of certain costs: (i) annul the losses recorded for the periods amounting to a total of bolivar 910 billion (corresponding to US dollar 425 million); (ii) determine for the same periods a taxable income amounting to a total of bolivar 115 billion (corresponding to US dollar 54 million); (iii) request a tax amounting to bolivar 52 billion (corresponding to US dollar 24 million) determined by applying a 50% tax rate rather than the 34% rate applied to other companies performing activities analogous to those of Eni DaciÓn BV. In particular it excluded the deductibility of : (i) interest

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charges due to other Eni Group companies that provided loans denominated in US dollars; (ii) exchange rate losses recorded in the financial statements and related to such loans resulting from the devaluation of the Venezuelan currency. The formal assessments served have a preliminary nature and do not request immediate payment nor do they specify the amount of a fine (from 10 to 250%) and of interest (average rate for the period approximately 23%). Eni DaciÓn filed a claim for the cancellation of the assessment. The tax administration will express its final position before the end of October 2006. If the assessments are confirmed payment requests will served to Eni DaciÓn BV containing amounts due tax claim or a recourse before the Judicial Authority can be filed against a payment request. Eni recorded a provision to the risk reserve for this matter. AGIP KARACHAGANAK BV In July 2004 relevant Kazakh authorities informed Agip Karachaganak BV and Agip Karachaganak Petroleum Operating BV, shareholder and operator of the Karachaganak contract, respectively, the final outcome of the tax audits performed for fiscal years 2000 to 2003. Claims by the Kazakh authorities concern unpaid taxes for a total of dollar 43 million, net to Eni, and the anticipated offsetting of VAT credits for dollar 140 million, net to Eni, as well as the payment of interest and penalties for a total of dollar 128 million. Both companies filed a counterclaim. With an agreement reached on 18 November 2004, the original amounts were reduced to dollar 26 million net to Eni that includes taxes, surcharges and interest. Meetings continue. Eni recorded a provision to the risk reserve for this matter. SNAM RETE GAS SPA With Regional Law No. 2 of 26 March 2002, the Sicilia Region introduced an environmental tax upon the owners of primary pipelines in Sicily (i.e. pipelines operating at a maximum pressure of over 24 bar). The tax was payable as of April 2002. In order to protect its interests, Snam Rete Gas filed a claim with the European Commission, aimed at opening a proceeding against the Italian Government and the Tax Commission of Palermo. The Authority for Electricity and Gas, although acknowledging that the tax burden is an operating cost for the transport activity, subjected inclusion of the environment tax in tariffs to the final ruling on its legitimacy by relevant authorities. With the ruling of 20 December 2002, the Court judged the tax at variance with European rules. In December 2002, Snam Rete Gas suspended payments based on the above Court ruling. Payments effected until November 2002 totaled euro 86.1 million. In January 2003 the Sicilia Region presented an appeal to the Council of State against the ruling of the Regional Administrative Court of Lombardia for the part that states the variance of the regional law with European rules. On 16 December 2003, the European Commission judged the tax instituted by the Republic of Italy, through the Sicilia Region, to be in contrast with European rules and with the cooperation agreement between the European Economic Community and the Peoples Democratic Republic of Algeria; the European Commission also stated that such environmental tax is in contrast with the common customs tariff because it modifies the equality of customs expenses on commodities imported from third countries and could create a deviation in trade with such countries and a distortion in access and competition rules. The Commission with its opinion presented on 7 July 2004 formally requested Italy to cancel the tax. The Italian Government must conform within two months from the reception of the opinion. As it did not conform, on 20 December 2004 the European Commission passed the case to the Court of Justice requesting a ruling. With a decision dated 5 January 2004, and confirmed on 4 March 2005 by the Regional Tax Commission, the Provincial Tax Commission of Palermo declared the environmental tax of the Sicilia Region illegitimate because it is in contrast with European rules and therefore accepted Snam Rete Gass claim for the repayment of the first installment of euro 10.8 million, already paid in April 2002 to the Sicilia Region. On 4 May 2004, the Sicilia Region repaid the first installment. As for the seven remaining installments paid after April 2002 (euro 75.3 million) the Provincial Tax Commission of Palermo with decision of 5 January 2005 confirmed the illegitimacy of the tax condemning the Region to repay the amounts paid and interest accrued to Snam Rete Gas. The Sicilia Region presented recourse to the Regional Tax Commission at Palermo, a hearing has been scheduled for 5 April 2006. On 3 November 2003, the Sicilia Region, following the procedure presented by Snam Rete Gas concerning the yearly liquidation of the tax for 2002, requested liquidation of tax, fines and interest (euro 14.2 million) relating to the unpaid December 2002 installment. On 30 December 2003 Snam Rete Gas filed a claim with request of suspension of payment as a result of the liquidation notice received from the Sicilia Region with the Provincial Tax Commission of Palermo, that, on 25 June 2004 accepted Snam Rete Gass claim and decided the cancellation of the liquidation notice served by the Sicilia Region, confirmed by the Regional Tax Commission on 7 March 2005. In any case Snam Rete Gas will not have to pay the tax: if the tax is considered illegitimate in other Courts of law, the company will have the right to the restitution of the money. If, to the contrary, the tax is considered legitimate by the other Courts, the Authority for Electricity and Gas will include the tax (Decision No. 146/2002 and No. 71/2003) in tariff with automatic and retroactive effects.

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Other judicial or arbitration proceedings SYNDIAL SPA (FORMER ENICHEM SPA) - SERFACTORING SPA In 1991, Agrifactoring SpA commenced proceedings against Serfactoring SpA, a company 49% owned by Sofid SpA which is controlled by Eni SpA. The claim relates to an amount receivable of euro 182 million for fertilizer sales (plus interest and compensation for inflation), originally owed by Federconsorzi to EniChem Agricoltura SpA (later Agricoltura SpA - in liquidation), and Terni Industrie Chimiche SpA (merged into Agricoltura SpA - in liquidation), that has been merged into EniChem SpA (now Syndial SpA). Such receivables were transferred by Agricoltura and Terni Industrie Chimiche to Serfactoring, which appointed Agrifactoring as its agent to collect payments. Agrifactoring guaranteed to pay the amount of such receivables to Serfactoring, regardless of whether or not it received payment at the due date. Following payment by Agrifactoring to Serfactoring, Agrifactoring was placed in liquidation and the liquidator of Agrifactoring commenced proceedings in 1991 against Serfactoring to recover such payments (equal to euro 182 million) made to Serfactoring based on the claim that the foregoing guarantee became invalid when Federconsorzi was itself placed in liquidation. Agricoltura and Terni Industrie Chimiche brought counterclaims against Agrifactoring (in liquidation) for damages amounting to euro 97 million relating to acts carried out by Agrifactoring SpA as agent. The amount of these counterclaims has subsequently been reduced to euro 46 million following partial payment of the original receivables by the liquidator of Federconsorzi and various setoffs. These proceedings, which have all been joined, were decided with a partial judgment, deposited on 24 February 2004: the request of Agrifactoring has been rejected and the company has been ordered to pay the sum requested by Serfactoring and damages in favor of Agricoltura, to be determined following the decision. Agrifactoring appealed against this partial decision, requesting in particular the annulment of the first step judgement, the reimbursement of the euro 180 million amount from Serfactoring along with the rejection of all its claims and the payment of all expense of the proceeding. The appeal pending was set to be discussed in a hearing set for 16 March 2007 but was anticipated at 27 October 2006 upon request of Agrifactoring. The judge of the Court of Rome, responsible for the determination of the amount of damages to be paid to Serfactoring and Agricoltura decided on 18 May 2005 to suspend this determination until the publication of the decision of the Court of Appeals, in accordance with Article 295 of the Code of civil procedure. Against this suspension Serfactoring and Syndial requested to the Court of Cassation the cancellation of the suspension and the return of the case to its original court. SYNDIAL SPA (FORMER ENICHEM SPA) In 2002, EniChem SpA was summoned by ICR Intermedi Chimici di Ravenna Srl before the Court of Milan in relation to a breach of a preliminary agreement for the purchase of an industrial area in Ravenna. ICR requested payment of compensatory damages for approximately euro 46 million, of which euro 3 million are compensatory damages and euro 43 million are for loss of profits. During 2004 the preliminary inquiry was completed. With a judgment of 11 October 2005 the Court rejected ICRs request and order that ICR pay all expenses. ICR filed a claim against this decision. Antitrust, EU Proceedings, actions of the Authority for Electricity and Gas and of other regulatory Authorities ENI SPA In March 1999, the Antitrust Authority concluded its investigation started in 1997 and: (i) verified that Snam SpA (merged in Eni SpA in 2002) abused its dominant position in the market for the transportation and primary distribution of natural gas relating to the transportation and distribution tariffs applied to third parties and the access of third parties to infrastructure; (ii) fined Snam euro 2 million; and (iii) ordered a review of these practices relating to such abuses. Snam believes it has complied with existing legislation and appealed the decision with the Regional Administrative Court of Lazio requesting its suspension. On 26 May 1999, stating that these decisions are against Law No. 9/1991 and the European Directive 98/30/EC, this Court granted the suspension of the decision. The Antitrust Authority did not appeal this decision. The decision on this dispute is still pending. With a decision of 9 December 2004, the Italian Antitrust Authority started an inquiry on the distribution of jet fuel against six Italian companies, including Eni and some of its subsidiaries, that store and load jet fuel in the Rome Fiumicino, Milan Linate and Milan Malpensa airports. The inquiry intends to ascertain the existence of alleged limitations to competition as oil companies would agree to divide among themselves the supplies to airlines. On 22 December 2005, the Authority notified the preliminary results of the inquiry concerning: (i) information flows to oil companies related to the functioning of shared storage and uploading companies; (ii) barriers to the entrance of new competitors; (iii) the price of jet fuel is higher than on other European markets. The term for the closing of the proceeding has been postponed from 31 March to 31 May 2006.

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On 28 April 2005 the Commission of the European Communities started a formal assessment to evaluate the alleged participation of Eni and its subsidiaries to activities limiting competition in the field of paraffin. The alleged violation of competition would have consisted in: (i) the determination of and increase in prices; (ii) the subdivision of customers; (iii) exchange of trade secrets, such as production capacity and sales volumes. On 3 November the Commission requested information on Enis activities in the field of paraffins. On 29 November 2005 Eni filed the requested information. The Department of Justice of the United States of America - Antitrust Division, notified Eni Petroleum Co Inc a subpoena requesting information and documents relating to activities in the field of wax to be filed before 20 June 2005. The company informed the department that it does not produce nor import wax in the United States of America. POLIMERI EUROPA SPA AND SYNDIAL SPA In December 2002, inquiries were commenced concerning alleged anti-competitive agreements in the area of elastomers. These inquiries were commenced concurrently by European and U.S. authorities. The first product under scrutiny was EP(D)M: the European Commission submitted to inspection the manufacturing companies of that product, among which Polimeri Europa SpA and Syndial and requested information to those two companies and to their controlling company, Eni SpA. After the inquiries the Commission decided to open a procedure for violation of competition laws and notified Eni, Polimeri Europa and Syndial the relevant charges to that effect on 8 March 2005. At a hearing held on 27 July 2005 the two companies presented memoranda and confirmed their position. The parties await for a decision of the Commission. EP(D)M manufacture is also under scrutiny in the United States, where the Department of Justice of San Francisco requested information and documents to Polimeri Europa Americas Inc, a U.S. subsidiary of Polimeri Europa and to its deputy chairman and sales manager. Class actions were filed claiming damages in relation to the alleged violation. In July 2005 Syndial signed a settlement agreement for the civil class action which entails the payment of approximately dollar 3.2 million, approved by the federal court. The investigation was also extended to the following products: NBR, CR, BR, SSBR and SBR. The European Commission started an investigation regarding BR, SBR, SSBR. On 26 January 2005 the Commission dropped the charges in relation to SSBR, while for the other two products the Commission started an infraction procedure by notifying Eni, Polimeri Europa and Syndial the relevant charges. The companies presented a written memorandum and the Commission decided to open an inquiry. With regard to NBR an inquiry is underway in Europe and the USA, where also class actions have been started. The class action at federal level was abandoned by the plaintiffs. The federal judge still has to acknowledge this abandonment. With regard to CR, as part of an investigation carried out in the USA, Syndial entered into a plea agreement with the Department of Justice pursuant to which Syndial would agree to pay a fine of US dollar 9 million, while the Department of Justice would agree that it will not bring further criminal charges against Syndial or against its affiliate companies. On 27 June 2005 the plea agreement was approved. For CR the civil class action was closed with a settlement agreement approved by the Federal judge on 8 July 2005 whereby the company will pay dollar 5 million. The European Commission requested Eni, Polimeri Europa and Syndial to provide information about CR. The two companies decided to cooperate with the Commission. Eni recorded a provision for these matters. STOCCAGGI GAS ITALIA SPA With Decision No. 26 of 27 February 2002, the Authority for Electricity and Gas determined tariff criteria for modulation, mineral and strategic storage services for the period starting on 1 April 2002 until 31 March 2006 and effective retroactively from 21 June 2000. On 18 March 2002 Stoccaggi Gas Italia SpA (Stogit) filed its proposal of tariff for modulation, mineral and strategic storage for the first regulated period. With Decision No. 49 of 26 March 2002, the Authority for Electricity and Gas repealed Stogits proposal and defined tariffs for the first regulated period. Stogit applied the tariff determined by the two decisions, but filed an appeal against both decisions with the Regional Administrative Court of Lombardia requesting their cancellation. With a decision dated 29 September 2003, that Court rejected the appeal presented by Stogit. Stogit filed an appeal to the Council of State against the sentence which was rejected by the Council of State on 6 January 2006. DISTRIBUIDORA DE GAS CUYANA SA The agency entrusted with the regulations for the natural gas market in Argentina (Enargas) started a formal investigation on some operators, among these Distribuidora de Gas Cuyana SA, a company controlled by Eni. Enargas stated that the company has applied improperly calculated conversion factors to volumes of natural gas invoiced to customers and requested the company to apply the conversion factors imposed by local regulations from the date of the default notification (31 March 2004) without

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prejudice to any damage payment and fines that may be decided after closing the investigation. On 27 April 2004, Distribuidora de Gas Cuyana presented a defense memorandum to Enargas, without prejudice to any possible appeal. Other commitments and risks not included in the balance sheet Commitments regarding long-term natural gas supply contracts stipulated by Eni, which contain take-or-pay clauses, are included in Operating Review - Gas & Power in the Report of the Directors in the Consolidated Financial Statement, which is considered an integral part of these Notes. Parent company guarantees given relating to contractual commitments for hydrocarbon exploration and production activities, quantified on the basis of the capital expenditures to be made, amount to euro 5,052 million (euro 3,192 million at 31 December 2004). In December 2005 Eni signed a transition agreement with the Venezuelan state company PDVSA under which the parties agreed to negotiate the terms for a transition to the new contractual regime of the empresa mixta, a new company to which titles and mineral assets of the DaciÓn field will be transferred with PDVSA holding the majority stake. Until the closing of the new contractual regime, Enis activities will be subject to the terms and conditions of the existing Operating Service Agreement. Negotiations are underway and currently it is not possible to foresee their outcome. Under the convention signed on 15 October 2001 by TAV SpA and CEPAV Due Eni committed to guarantee the execution of design and construction of the works assigned to the CEPAV Consortium (of which it is a party) and guaranteed to TAV the correct and timely execution of all obligations indicated in the convention in a subsequent integration deed and in any further addendum or change or integration to the same. The regulation of CEPAV Due contains the same obligations and guarantees contained in the CEPAV Uno agreement. A guarantee for euro 282 million to Cameron LNG provided on behalf of Eni USA Gas Marketing Llc (Enis interest 100%) for the regasification contract entered on 1 August 2005. This guarantee is subject to a suspension clause and will come in force when the regasification service starts in a period included between 1 October 2008 and 30 June 2009. Non-quantifiable risks related to contractual assurances given to acquirors of investments against certain unforeseeable liabilities attributable to tax, state welfare contributions and environmental matters applicable to periods during which such investments were owned by Eni. Eni believes such matters will not have a material adverse effect on its consolidated financial statements. Environmental Regulations Together with other companies in the industries in which it operates, Eni is subject to numerous EU, national, regional and local environmental laws and regulations concerning its oil and gas operations, products and other activities, including legislation that implements international conventions or protocols. In particular, these laws and regulations require the acquisition of a permit before drilling for hydrocarbons may commence, restrict the types, quantities and concentration of various substances that can be released into the environment in connection with exploration, drilling and production activities, limit or prohibit drilling activities on certain protected areas, and impose criminal or civil liabilities for pollution resulting from oil, natural gas, refining and petrochemical operations. These laws and regulations may also restrict emissions and discharges to surface and subsurface water resulting from the operation of natural gas processing plants, petrochemicals plants, refineries, pipeline systems and other facilities that Eni owns. In addition, Enis operations are subject to laws and regulations relating to the generation, handling, transportation, storage, disposal and treatment of waste materials. Environmental laws and regulations have a substantial impact on Enis operations. Some risk of environmental costs and liabilities is inherent in particular operations and products of Eni, as it is with other companies engaged in similar businesses, and there can be no assurance that material costs and liabilities will not be incurred. Although management, considering the actions already taken with the insurance policies to cover environmental risks and the provision for risks accrued, does not currently expect any material adverse effect upon Enis consolidated financial statements as a result of its compliance with such laws and regulations, there can be no assurance that there will not be a material adverse impact on Enis consolidated financial statements due to: (i) the possibility of as yet unknown contamination; (ii) the results of the on-going surveys and the other possible effects of statements required by Decree No. 471/1999 of the Ministry of Environment; (iii) the possible effect of future environmental legislation and rules, such as: (a) the decree of the Ministry of Environment No. 367 published on 8 January 2004, that regards the fixing of new quality standards for aquatic environment and dangerous substances and Legislative Decree No. 59/2005 concerning the integrated environmental authorization (IPPC), (b) the application of European directive 2004/35/EC concerning environmental responsibility for prevention and reclamation of environmental damage, referred to in paragraph 439 of the single article of Law No. 266/2005 (budget law for 2006), (c) a legislative decree to be issued in implementation of Law No. 308 of 15 December 2004 that delegated to the Government the restructuring of regulations concerning waste disposal and reclamation of polluted areas, protection of waters from pollution and management of water resources, payment of environmental damage, procedures for the evaluation of environmental impact and for the strategic

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environmental impact as well as protection from emission into the atmosphere within 18 months. The draft law approved by the Council of Ministers on 10 February 2006 is currently being examined by the President of the Republic. The also implements European directive 2000/60/EC that established a European action framework for the protection of waters; (iv) the effect of possible technological changes relating to future remediation; (v) the possibility of litigation and the difficulty of determining Enis liability, if any, as against other potentially responsible parties with respect to such litigation and the possible insurance recoveries. Emission trading Law No. 316 of 30 December 2004 which converts Law Decree No. 237/2004 implemented European directive 2003/87/EC which establishes a system for emission trading. From 1 January 2005 this European emission trading scheme is in force and on this matter on 24 February 2006 the Ministry of the Environment published a decree defining emission permits for the 2005-2007 period. In particular Eni was assigned permits corresponding to 65.2 million tonnes of carbon dioxide (of which 22.4 for 2005, 21.4 for 2006 and 21.4 for 2007). In 2005 emissions of carbon dioxide from Enis plants were lower than permits assigned. 25 Revenues The following is a summary of the main components of Revenues. More information about changes in revenues is included in the Financial review of the Report of the Directors. Net sales from operations are as follows:

(million euro) 2004 2005

Net sales from operations	57,413	73,679
Change in
contract work in progress	132	49
	57,545	73,728

Net sales from operations are net of the following items:

(million euro) 2004 2005

Excise tax	14,060	14,140
Exchanges of oil sales (excluding excise tax)	1,735	2,487
Exchanges
of other products	86	108
Services billed to joint venture partners	1,175	1,331
Sales to
service station managers for sales billed to holders of
credit card	1,122	1,326
	18,178	19,392

Net sales from operations by industry segment and geographic area of destination are presented in Note 31. Other income and revenues Other income and revenues are as follows:

(million euro) 2004 2005

| Contract
penalties and other trade revenues | 43 | 114 |
| --- | --- | --- |
| Lease and rental income | 93 | 102 |
| Compensation
for damages | 87 | 89 |
| Gains from sale of assets | 407 | 71 |
| Other
proceeds (*) | 747 | 422 |
| | 1,377 | 798 |

(*) Each individual amount included herein does not exceed euro 25 million.

Other income of 2004 include differentials on commodity derivatives for euro 61 million.

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26 Operating expenses The following is a summary of the main components of Operating expenses. More information about changes in operating expenses is included in the Financial review of the Report of the Directors. Purchases, services and other Purchases, services and other include the following:

(million euro) 2004 2005

| Production costs-raw, ancillary and consumable
materials and goods | 27,010 | 35,318 |
| --- | --- | --- |
| Production costs-services | 9,148 | 9,405 |
| Operating leases and other | 1,609 | 1,929 |
| Net provisions to reserves for contingencies | 553 | 1,643 |
| Other expenses | 1,066 | 1,100 |
| | 39,386 | 49,395 |

(1,039	(828
38,347	48,567

Production costs-services brokerage include fees for euro 24 million (euro 26 million at 31 December 2004). Costs for research and development that do not meet the requirements to be capitalized amount to euro 202 million (euro 210 million in 2004). Operating leases and other include royalties on hydrocarbons extracted for euro 965 million (euro 741 million in 2004). Provisions to reserves for contingencies are net of deductions not corresponding to cash expenditures and concern in particular the environmental risks reserve for euro 515 million (euro 145 million in 2004), the contract penalties and disputes reserve for euro 336 million (euro 23 million 2004), the revision of selling prices reserve for euro 321 million and the loss adjustment and actuarial reserve for euro 82 million (euro 13 million in 2004). Payroll and related costs Payroll and related costs are as follows:

(million euro) 2004 2005

| Wages and
salaries — Social security contributions | 2,402 — 658 | | 2,484 — 662 | |
| --- | --- | --- | --- | --- |
| Contributions
to defined benefit plans | 118 | | 126 | |
| Other costs | 218 | | 255 | |
| | 3,396 | | 3,527 | |
| less: | | | | |
| -
capitalized direct costs associated with self-constructed
assets | (151 | ) | (176 | ) |
| | 3,245 | | 3,351 | |

Stock compensation STOCK GRANT With the aim of improving motivation and loyalty of the managers of Eni SpA and its subsidiaries as defined in Article 2359 of the Civil Code 14 through the linking of compensation to the attainment of preset individual and corporate objectives, making management participate in corporate risk and motivating them towards the creation of shareholder value and increasing at the same time their contribution to the management of the Company, Eni offers its own shares purchased along its buy-back program (treasury shares) for no consideration to those managers of Eni who have achieved corporate and individual objectives. Assignments vest within 45 days after the end of the third year from the date of the offer.

(14) Does not include listed subsidiaries, which have their own stock grant plans.

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At 31 December 2005, 3,127,200 of ordinary shares with nominal value euro 1 are outstanding and concern the 2003 stock grant plan for a total of 1,018,400 shares with a fair value of euro 11.20 per share, the 2004 stock grant plan for a total of 912,400 shares with a fair value of euro 14.57 per share and the 2005 stock grant plan for a total of 1,196,400 shares with a fair value of euro 20.08 per share. STOCK OPTION With the aim of improving motivation and loyalty of the managers of Eni SpA and its subsidiaries as defined in Article 2359 of the Civil Code 15 that hold significant positions of managerial responsibility or that are considered as strategic managers for the Group, Eni approved stock compensation plans that provide the assignment for no consideration of purchase rights of Eni treasury shares (options). Stock options provides the right for the purchase of treasury share in a 1 to 1 ratio after the end of the third year from the date of the grant, with a strike price calculated as arithmetic average of official prices registered on the Mercato Telematico Azionario in the month preceding assignment or (starting from 2003), if greater, as average cost of treasury shares registered in the day preceding assignment. Strike price for 2005 stock option grant was euro 22.512. Stock option grantees can obtain advances by the Group financial company for the payment of shares acquired on condition that the grantees contemporaneously underwrite an irrevocable warrant of sale to the above-mentioned financial company, regarding the shares acquired. At 31 December 2005 were granted 13,379,600 options for the purchase of 13,379,600 ordinary shares nominal value of euro 1 of Eni SpA. Options refer to the 2002 stock plan for 903,100 shares with an exercise price of euro 15.216 per share, to the 2003 stock plan for 4,106,500 shares with an exercise price of euro 13.743 per share, to the 2004 stock plan for 3,659,000 shares with an exercise price of euro 16.576 per share and to the 2005 stock plan for 4,711,000 shares with an exercise price of euro 22.512 per share. At 31 December 2005 the weighted-average remaining contractual life of the options outstanding at December 2002, 2003, 2004 and 2005 is 4 years and 7 month, 5 years and 7 month, 6 years and 7 month, and 7 years and 7 month, respectively. The fair value of stock options granted during the years 2002, 2003, 2004 and 2005 was 5.39, 1.50, 2.01 and 3.33 euro for share respectively and was calculated applying the Black-Scholes method using the following assumptions:

2002 2003 2004 2005

| Risk-free
interest rate | (%) | 3.5 | 3.16 | 3.21 | 2.51 |
| --- | --- | --- | --- | --- | --- |
| Expected life | (year) | 8 | 8 | 8 | 8 |
| Expected
volatility | (%) | 43 | 22 | 19 | 21 |
| Expected dividends | (%) | 4.5 | 5.35 | 4.5 | 3.98 |

Compensation of key management personnel Compensation of persons responsible of key positions in planning, direction and control functions of Eni Group companies, including executive officers (key management personnel) amount to euro 14 and euro 15 million for 2004 and 2005, respectively, and consist of the following:

(million euro) 2004 2005

Wages and salaries	12	11
Post-employment
benefits	1	1
Indemnities due upon termination of employment		1
Stock
grant/option	1	2
	14	15

Compensation of Directors, Statutory Auditors and General Managers Compensation of Directors, Statutory Auditors and General Managers amount to euro 4.5 million and euro 19.2 million in 2004 and 2005, respectively. Compensation of Statutory Auditors amount to euro 0.688 and euro 0.785 million in 2004 and 2005, respectively. Compensation of Directors, Statutory Auditors and General Managers include emoluments and all other retributive and social security compensations due for the function of manager or statutory auditor assumed in Eni SpA or in other companies included in the scope of consolidation, that are a cost for Eni.

(15) Does not include listed subsidiaries, which have their own stock grant plans.

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The average number of employees of the companies included in the scope of consolidation by type is as follows:

(units) 2004 2005

Senior managers	1,746	1,754
Junior
managers	10,449	10,747
Employees	35,393	34,457
Workers	25,623	24,345
	73,211	71,303

The average number of employers is calculated as half of the total of the number of employees at the beginning and at the end of the period. The average number of senior managers includes managers employed and operating in foreign countries, whose position is comparable to a senior manager status. Depreciation, amortization and impairments Depreciation, amortization and impairments consist of the following:

(million euro) 2004 2005

| Depreciation and amortization: — - tangible
assets | 3,670 | | 4,576 | |
| --- | --- | --- | --- | --- |
| - intangible assets | 931 | | 936 | |
| | 4,601 | | 5,512 | |
| Impairments: | | | | |
| - tangible
assets | 329 | | 264 | |
| - intangible assets | 4 | | 8 | |
| | 333 | | 272 | |
| less: | | | | |
| - direct
costs associated with self-constructed assets | (3 | ) | (3 | ) |
| | 4,931 | | 5,781 | |

27 Financial income (expense) Financial income (expense) consists of the following:

(million euro) 2004 2005

| Exchange differences, net — Financial
expense capitalized | 202 | | 169 — 159 | |
| --- | --- | --- | --- | --- |
| Income from financial receivables | 95 | | 95 | |
| Net income
from securities | 31 | | 36 | |
| Interest on tax credits | 17 | | 17 | |
| Net
interest due to banks | (110 | ) | (38 | ) |
| Financial expense due to the passage of time (1) | (109 | ) | (109 | ) |
| Interest
and other financial expense on ordinary bonds | (247 | ) | (265 | ) |
| Income (expense) on derivatives | 34 | | (386 | ) |
| Other
financial expense, net | (69 | ) | (44 | ) |
| | (156 | ) | (366 | ) |

(1) The item concern the increase of reserves for contingencies and charges that are indicated at an actualized value in non-current liabilities.

The decrease in income (expense) from derivatives of euro 420 million is primarily due to the application from 1 January 2005 of IAS 39 which requires that derivatives be stated at fair value and the effects charged to the profit and loss account, instead of being connected with the economic effects of the hedged transactions as recorded in 2004. Such derivatives, in fact, do not meet the conditions required by IFRS to be qualified as hedging instruments. Also the increase in net exchange differences of euro 169 million is primarily due to the application of IAS 39, because the effect of the translation at period-end of assets and liabilities

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denominated in currencies other than functional currency is not compensated by the effect of the translation at period-end of the commitments for derivatives contracts. 28 Income (expense) from investments Effects of investments accounted for using the equity method Effects of investments accounted for using the equity method consist of the following:

(million euro) 2004 2005

401 — (69	770 — (33
332	737

More information about gains and losses from investments accounted for using the equity method is presented in Note 10. Other income (expense) from investments Other income (expense) from investments consists of the following:

(million euro) 2004 2005

Gains on disposals — Dividends	130 — 72		179 — 33
Losses on disposals	(1	)	(8	)
Other
income (expense), net	287		(27	)
	488		177

The gains on disposals of euro 179 million concern the sale of 100% of the share capital of Italiana Petroli SpA (euro 132 million) and 2.33% of Nuovo Pignone Holding SpA (euro 24 million). Other net income from investments concern the gain recorded in the consolidated financial statements due to the sale of 9.054% of the share capital of Snam Rete Gas SpA to Mediobanca SpA (euro 308 million). 29 Income tax expense Income tax expense consists of the following:

(million euro) 2004 2005

| Current
taxes: — - Italian subsidiaries | 1,098 | | 1,872 | |
| --- | --- | --- | --- | --- |
| - foreign
subsidiaries of the Exploration & Production segment | 3,116 | | 5,116 | |
| - foreign subsidiaries | 278 | | 373 | |
| | 4,492 | | 7,361 | |
| Less: | | | | |
| - tax
credits on dividend distributions not offset with current
tax payment | (39 | ) | (34 | ) |
| | 4,453 | | 7,327 | |
| Net
deferred taxes: | | | | |
| - Italian subsidiaries | 843 | | 334 | |
| - foreign
subsidiaries of the Exploration & Production segment | 215 | | 464 | |
| - foreign subsidiaries | 11 | | 3 | |
| | 1,069 | | 801 | |
| | 5,522 | | 8,128 | |

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Current taxes of the year relate to Italian companies for euro 1,872 million and concern Ires for euro 1,489 and Irap for euro 359 million, and foreign companies for euro 24 million. The effective tax rate is 46.8% (42.2% in the 2004) compared with a statutory tax rate of 38.1% (38.2% in the 2004), calculated by applying a 33% tax rate (Ires) to profit before income taxes and 4.25% tax rate (Irap) to the net value of production as provided for by Italian laws. The difference between the statutory and effective tax rate is due to the following factors:

(%) 2004 2005

Statutory tax rate	38.2		38.1
Items
increasing (decreasing) statutory tax rate:
- higher foreign subsidiaries tax rate	5.2		8.8
-
permanent differences	(0.7	)	0.8
- other	(0.4	)	(0.9	)
	4.1		8.7
	42.3		46.8

Permanent differences in 2004 mainly concern the gain recorded in the consolidated financial statements due to the sale of 9.054% of the share capital of Snam Rete Gas SpA (0.7%) to Mediobanca SpA. Permanent differences in 2005 mainly concern the undeductibility from taxable income of the addition in the reserve for contingencies following the fine imposed on 15 February 2006 by the Antitrust Authority to Eni SpA (0.6%). 30 Earnings per share Basic earnings per share is calculated by dividing Net profit of the year by the weighted-average number of shares issued and outstanding during the year, excluding treasury shares. The number of shares outstanding used for the calculation of the basic earnings per share was 3,771,692,584 and 3,758,519,603 in 2004 and 2005, respectively. Diluted earnings per share is calculated by dividing Net profit of the year by the weighted-average number of shares issued and outstanding during the year, excluding treasury shares, including shares that could be issued potentially. At 31 December 2004 and 2005, shares that could be issued potentially concern essentially shares granted under stock grant and stock option plan. The number of shares outstanding used for the calculation of the diluted earnings per share was 3,774,953,710 and 3,763,375,140 in 2004 and 2005, respectively. Reconciliation of the average number shares outstanding used for the calculation of the basic and diluted earning per share is as follows:

31.12.2004 31.12.2005

| Average
number of shares used for the calculation of the basic
earnings per share | | 3,771,692,584 | 3,758,519,603 |
| --- | --- | --- | --- |
| Number of
potential shares following stock grant plans | | 1,953,518 | 2,268,265 |
| Number of
potential shares following stock options plans | | 1,307,608 | 2,587,272 |
| Average
number of shares used for the calculation of the diluted
earnings per share | | 3,774,953,710 | 3,763,375,140 |
| Enis
net profit | (million euro) | 7,059 | 8,788 |
| Basic
earning per share | (euro per share) | 1.87 | 2.34 |
| Diluted
earning per share | (euro per share) | 1.87 | 2.34 |

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31 Information by industry segment and geographic financial information Information by industry segment

(million euro) Exploration & Production Gas & Power Refining & Marketing Petrochemicals Oilfield Services Construction and Engineering Other activities Corporate and financial companies Elimination Total

2004
Net sales from operations (a)	15,346		17,302		26,089		5,331		5,696		1,279		851
Less:
intersegment sales	(10,216	)	(493	)	(753	)	(499	)	(903	)	(754	)	(731	)
Net sales to customers	5,130		16,809		25,336		4,832		4,793		525		120				57,545
Operating
profit	8,185		3,428		1,080		320		203		(395	)	(363	)	(59	)	12,399
Provisions for contingencies	2		53		309		3		20		16		150				553
Depreciation,
amortization and writedowns	3,335		644		476		116		184		70		106				4,931
Effects of investments accounted for using the
equity method	7		164		89		(4	)	117				(41	)			332
Identifiable
assets (b)	23,866		19,852		9,118		2,821		4,706		708		1,182				62,253
Investments accounted for using the equity
method	273		1,773		745		5		328		30		2				3,156
Identifiable
liabilities (c)	4,798		3,394		3,848		621		2,825		1,976		1,589				19,051
Capital expenditures	4,853		1,451		693		148		186		49		119				7,499
2005
Net sales from operations (a)	22,477		22,969		33,732		6,255		5,733		1,358		977
Less:
intersegment sales	(14,761	)	(572	)	(1,092	)	(683	)	(925	)	(905	)	(835	)
Net sales to customers	7,716		22,397		32,640		5,572		4,808		453		142				73,728
Operating
profit	12,574		3,321		1,857		202		307		(902	)	(391	)	(141	)	16,827
Provisions for contingencies	50		703		420		47		32		287		104				1,643
Depreciation,
amortization and writedowns	4,100		685		467		147		180		106		100		(4	)	5,781
Effects of investments accounted for using the
equity method	14		359		221		3		140								737
Identifiable
assets (b)	28,982		21,928		11,787		2,905		5,248		612		1,377		(534	)	72,305
Investments accountedfor using the equity method	292		2,155		936		19		457		31						3,890
Identifiable
liabilities (c)	6,762		5,097		4,542		702		3,204		2,249		1,975				24,531
Capital expenditures	4,964		1,152		656		112		349		69		112				7,414

| (a) | Before
elimination of intersegment sales. |
| --- | --- |
| (b) | Includes
assets directly related to the generation of operating
profite. |
| (c) | Includes
liabilities directly related to the generation of
operating profit. |

Intersegment sales are conducted on an arms length basis.

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Geographic financial information ASSETS AND INVESTMENTS BY GEOGRAPHIC AREA OF ORIGIN

(million euro) Italy Other EU Rest of Europe Africa Americas Asia Other areas Total

2004 — Identifiable assets (a)	33,812	9,096	2,598	2,011	4,499	9,942	295	62,253
Capital
expenditures	2,655	337	387	357	1,066	2,622	75	7,499
2005
Identifiable
assets (a)	38,229	8,768	3,085	2,670	5,864	13,445	244	72,305
Capital expenditures	2,442	545	415	507	1,181	2,233	91	7,414

(a) Includes assets directly related to the generation of operating profit.

SALES FROM OPERATIONS BY GEOGRAPHIC AREA OF DESTINATION

(million euro) 2004 2005

Italy	27,100	32,846
Other European Union	13,095	19,601
Rest of
Europe	3,769	5,123
Americas	5,790	6,103
Asia	3,088	4,399
Africa	4,148	5,259
Other
areas	555	397
	57,545	73,728

32 Transactions with related parties In the ordinary course of its business Eni enters into transactions concerning the exchange of goods, provision of services and financing with affiliated companies and non-consolidated subsidiaries as well as with entities directly and indirectly owned or controlled by the Government. All such transactions are mainly conducted on an arms length basis in the interest of Eni companies. The following is a description of trade and financing transactions with related parties. Relevant transactions carried out with entities controlled by the Italian government are only those with Enel, the Italian National Electric Company.

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Trade and other transactions Trade and other transactions for the year 2004 consist of the following:

(million euro) Dec. 31, 2004 2004

Costs Revenues

Name Receivables Payables Guarantees Commitments Goods Services Goods Services

| Joint ventures and affiliated companies — Albacom
SpA | 8 | 14 | | | 3 | 35 | | 8 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| ASG Scarl | 51 | 88 | 33 | | | 203 | 1 | 7 |
| Azienda
Energia e Servizi Torino SpA | 1 | 18 | | | | 68 | | 3 |
| Bayernoil Raffineriegesellschaft mbH | | 39 | | | 2 | 791 | 1 | |
| Bernhard
Rosa Inh. Ingeborg Plochinger GmbH | 10 | | | | | | 108 | |
| Blue Stream Pipeline Co BV | 43 | 10 | | | | 121 | | 5 |
| Bronberger
& Kessler und Gilg & Schweiger GmbH | 13 | | | | | | 141 | |
| Cam Petroli Srl | 1 | | | | | | 6 | |
| Consorzio
Eni per lAlta velocità - Cepav Uno | 167 | 165 | 4,894 | | | | | 531 |
| Eni Oil Co Ltd | 4 | 163 | | | | 53 | | |
| Erg
Raffinerie Mediterranee SpA | 30 | 30 | | 100 | 1,043 | 10 | 412 | 9 |
| Gruppo Distribuzione Petroli Srl | 16 | | | | | | 45 | |
| Karachaganak
Petroleum Operating BV | 21 | 12 | | | | 104 | | 42 |
| Modena Scarl | 6 | 37 | 43 | | | 134 | | 1 |
| Petrobel
Belayim Petroleum Co | | 83 | | | | 240 | | |
| Promgas SpA | 27 | 23 | | | 230 | | 259 | |
| Raffineria
di Milazzo ScpA | 6 | 4 | | | | 245 | 62 | |
| Rodano Consortile Scarl | 3 | 22 | 1 | | | 79 | | 1 |
| Siciliana
Gas Vendite SpA | 9 | | | | | | 36 | |
| Supermetanol CA | | 24 | | | 79 | 10 | | |
| Super
Octanos CA | | 55 | | | 212 | 11 | | 1 |
| Trans Austria Gasleitung GmbH | | 15 | | | | 167 | | 3 |
| Trans
Europa Naturgas Pipeline GmbH | | 9 | | | | 51 | | |
| Transitgas AG | | 2 | | | | 59 | | |
| UniÓn
Fenosa Gas Comercializadora SA | | | | | | | 7 | |
| UniÓn Fenosa Gas SA | | | 111 | | | | | 1 |
| Other () | 84 | 74 | 109 | | 23 | 108 | 56 | 18 |
| | 500 | 887 | 5,191 | 100 | 1,592 | 2,489 | 1,134 | 630 |
| Unconsolidated
subsidiaries | | | | | | | | |
| Agip Kazakhstan North Caspian Operating Co NV | 2 | | | | 1 | 14 | | 9 |
| Eni BTC
Ltd | | | 143 | | | | | |
| Eni Gas BV | 30 | 40 | 17 | | | 5 | | 1 |
| Eni Middle
East BV | | | 367 | | | | | |
| Transmediterranean Pipeline Co Ltd | 1 | 1 | | | | 90 | | |
| Other () | 30 | 4 | 10 | | 4 | 8 | 2 | 11 |
| | 63 | 45 | 537 | | 5 | 117 | 2 | 21 |
| | 563 | 932 | 5,728 | 100 | 1,597 | 2,606 | 1,136 | 651 |
| Entities owned or controlledby the Government | | | | | | | | |
| Enel | 234 | 3 | | | 2 | 20 | 1,287 | 350 |
| | 797 | 935 | 5,728 | 100 | 1,599 | 2,626 | 2,423 | 1,001 |

(*) Each individual amount included herein does not exceed euro 50 million.

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Trade and other transactions for the year 2005 consist of the following:

(million euro) 31.12.2005 2005

Costs Revenues

Name Receivables Payables Guarantees Goods Services Goods Services

| Joint
ventures and affiliated companies — ASG Scarl | 13 | 66 | 72 | | 173 | | 6 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Azienda
Energia e Servizi Torino SpA | 2 | 24 | | | 56 | | 2 |
| Bayernoil Raffineriegesellschaft mbH | | 49 | 1 | | 814 | | |
| Bernhard
Rosa Inh. Ingeborg Plochinger GmbH | 10 | | | | | 172 | |
| Blue Stream Pipeline Co BV | 45 | 12 | | | 177 | | 4 |
| Bronberger
& Kessler und Gilg & Schweiger GmbH | 12 | | | | | 207 | |
| Cam Petroli Srl | 85 | | | | | 593 | |
| Consorzio
Eni per lAlta Velocità - Cepav Uno | 105 | 107 | 4,894 | | | | 411 |
| Eni Gas BV | 16 | 149 | | | 47 | | |
| Eni Oil Co
Ltd | | 84 | | | 50 | | |
| Fox Energy Srl | 22 | | | 4 | | 240 | |
| Gruppo
Distribuzione Petroli Srl | 22 | | | | | 89 | |
| Karachaganak Petroleum Operating BV | 13 | 46 | | 6 | 99 | | 4 |
| Mangrove
Gas Netherlands BV | | | 55 | | | | |
| Modena Scarl | 2 | 12 | 61 | | 56 | 1 | 1 |
| Petrobel
Belayim Petroleum Co | | 138 | | | 248 | | |
| Promgas SpA | 44 | 45 | | 307 | | 355 | |
| Raffineria
di Milazzo ScpA | 10 | 10 | | | 204 | 94 | |
| Rodano Consortile Scarl | 2 | 20 | | | 80 | | 2 |
| RPCO
Enterprise Ltd | | | 55 | | | | |
| Siciliana Gas Vendite SpA | 13 | | | | | 48 | |
| Supermetanol
CA | | 8 | | 65 | | | |
| Super Octanos CA | 1 | 14 | | 265 | | | |
| Toscana
Gas Clienti SpA | 46 | | | | | 118 | |
| Trans Austria Gasleitung GmbH | 43 | 55 | | 43 | 143 | | 47 |
| Trans
Europa Naturgas Pipeline GmbH | | 2 | | | 44 | | |
| Transitgas AG | | 7 | | | 64 | | |
| Transmediterranean
Pipeline Co Ltd | | 4 | | | 88 | | 1 |
| UniÓn Fenosa Gas Comercializadora SA | 4 | | | 36 | | 37 | |
| UniÓn
Fenosa Gas SA | 4 | 4 | 62 | 79 | | 16 | 2 |
| Other () | 84 | 84 | 112 | 33 | 113 | 62 | 67 |
| | 598 | 940 | 5,312 | 838 | 2,456 | 2,032 | 547 |
| Unconsolidated subsidiaries | | | | | | | |
| Agip
Kazakhstan North Caspian Operating Co NV | 4 | 152 | | 5 | 19 | | 28 |
| Eni BTC Ltd | | | 165 | | | | |
| Other () | 44 | 48 | 8 | 1 | 31 | 15 | 9 |
| | 48 | 200 | 173 | 6 | 50 | 15 | 37 |
| | 646 | 1,140 | 5,485 | 844 | 2,506 | 2,047 | 584 |
| Entities owned or controlled by the
Government | | | | | | | |
| Enel | 187 | 5 | | 12 | 10 | 1,180 | 333 |
| | 833 | 1,145 | 5,485 | 856 | 2,516 | 3,227 | 917 |

(*) Each individual amount included herein does not exceed euro 50 million.

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Engineering, construction and maintenance services were acquired on an arms length basis from the Cosmi Holding Group, related to Eni through a member of the Board of Directors, for a total of approximately euro 28 million and euro 18 million in 2004 and 2005, respectively. Most significant transactions concern: - provision of specialized services in upstream activities from Agip Kazakhstan North Caspian Operating Co BV, Eni Oil Co Ltd, Eni Gas BV, Karachaganak Petroleum Operating BV and Petrobel Belayim Petroleum Co; services are invoiced on the basis of incurred costs; exclusively with Eni Gas BV, the unsecured guarantees in relation to the construction of a hydrocarbon treatment plant in Libya and receivables and payables for investment activities and with Karachaganak Petroleum Operating Co BV and Agip Kazakhstan North Caspian Operating BV the provision of services from the Oilfield Services Construction and Engineering segment of Eni; - communication services, data transmission and concessions of optical fibers with Albacom SpA; in 2005 the company has been sold to third parties; - transportation and distribution activities with Azienda Energia e Servizi Torino SpA; - sale of petrochemical products, supply of crude oil refining activities and fuel additive purchase from Bayernoil Raffineriegesellschaft GmbH, Bernhard Rosa Inh. Ingeborg Plochinger GmbH, Bronberger & Kessler und Gilg & Schweiger GmbH, Cam Petroli Srl, Gruppo Distribuzione Petroli Srl, Fox Energy Srl, Supermetanol CA and Superoctanos CA; - acquisition of natural gas transport services outside Italy from Blue Stream Pipeline Co BV and services from the Oilfield Services Construction and Engineering segment of Eni; - acquisition of refining services from Erg Raffinerie Mediterranee SpA and Raffineria di Milazzo ScpA on the basis of general conditions applied to third parties for Erg Raffinerie Mediterranee SpA and of incurred costs for Raffineria di Milazzo ScpA; in 2005 Erg Raffinerie Mediterranee SpA has been sold to third parties; - guarantees given on behalf of Mangrove Gas Netherlands BV and RPCO Enterprise Ltd relating to bid bonds and performance bonds; - sale and acquisition of natural gas outside Italy with Promgas SpA; - sale of natural gas with Siciliana Gas Vendite SpA e Toscana Gas Clienti SpA; - transactions related to the planning and the construction of the tracks for high speed/high capacity trains from Milan to Bologna with the Consorzio Eni per lAlta Velocità - CEPAV Uno, ASG Scarl, Modena Scarl and Rodano Consortile Scarl, and relevant guarantees; - acquisition of natural gas transport services outside Italy from Trans Austria Gasleitung GmbH, Trans Europa Naturgas Pipeline GmbH and Transitgas AG; transactions are regulated on the basis of compensation calculated following the same criteria used in third parties transactions; - performance guarantees given on behalf of UniÓn Fenosa Gas SA in relation to contractual commitments related to the results of operations and sale and acquisition of natural outside Italy with UniÓn Fenosa Gas SA and UniÓn Fenosa Gas Comercializadora SA; - guarantees given in relation to the construction of an oil pipeline on behalf of Eni BTC Ltd; - guarantees given to Eni Middle East BV against the contractual commitments with the Government of the Kingdom of Saudi Arabia in 2004; in 2005 the company has been included in the scope of consolidation; - acquisition of natural gas transport services outside Italy from Transmediterranean Pipeline Co Ltd; transactions are regulated on the basis of tariffs, which permit the recovery of operating expenses and capital employed. Transactions with Enel concern the sale and transportation of natural gas, the sale of fuel oil and the sale and purchase of electricity; transactions are mainly conducted on an arms length basis.

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Financing transactions Financing transactions in 2004 are as follows:

(million euro) 31.12.2004 2004

Name Receivables Payables Guarantees Charges Gains

| Joint
ventures and affiliated companies — Albacom SpA | 22 | | 88 | | |
| --- | --- | --- | --- | --- | --- |
| Blue
Stream Pipeline Co BV | | 2 | 768 | | 29 |
| EnBW - Eni Verwaltungsgesellschaft mbH | | | 250 | | |
| Raffineria
di Milazzo ScpA | | | 107 | | |
| Spanish Egyptian Gas Co SAE | | | 404 | | 9 |
| Trans
Austria Gasleitung GmbH | 389 | | | | 9 |
| Transmediterranean Pipeline Co Ltd | 197 | | | | 9 |
| Other () | 52 | 91 | 55 | 9 | 11 |
| | 660 | 93 | 1,672 | 9 | 67 |
| Unconsolidated
subsidiaries | | | | | |
| Other () | 71 | 54 | 2 | 4 | 2 |
| | 71 | 54 | 2 | 4 | 2 |
| | 731 | 147 | 1,674 | 13 | 69 |

(*) Each individual amount included herein does not exceed euro 50 million.

Financing transactions in 2005 are as follows:

(million euro) 31.12.2005 2005

Name Receivables Payables Guarantees Charges Gains

| Joint
ventures and affiliated companies — Blue Stream Pipeline Co BV | | 15 | 887 | | |
| --- | --- | --- | --- | --- | --- |
| Raffineria
di Milazzo ScpA | | | 72 | | |
| Spanish Egyptian Gas Co SAE | | | 360 | | |
| Trans
Austria Gasleitung GmbH | 53 | | | | 12 |
| Transmediterranean Pipeline Co Ltd | 141 | | | | 11 |
| Other () | 50 | 125 | 81 | 27 | 47 |
| | 244 | 140 | 1,400 | 27 | 70 |
| Unconsolidated
subsidiaries | | | | | |
| Other () | 12 | 30 | 34 | 1 | 2 |
| | 12 | 30 | 34 | 1 | 2 |
| | 256 | 170 | 1,434 | 28 | 72 |

(*) Each individual amount included herein does not exceed euro 50 million.

Most significant transactions in 2005 concern: - lendings and guarantees to Albacom SpA in 2004; in 2005 Albacom SpA has been sold to third parties; - bank debt guarantees given on behalf of Blue Stream Pipeline Co BV, EnBW - Eni Verwaltungsgesellschaft mbH, Raffineria di Milazzo and Spanish Egyptian Gas Co SAE and the cash deposit at Enis financial companies; guarantee given on behalf of EnBW - Eni Verwaltungsgesellschaft mbH expired in 2005; - the financing of the Austrian section of the gasline from the Russian Federation to Italy and the construction of natural gas transmission facilities and transport services with Trans Austria Gasleitung GmbH and Transmediterranean Pipeline Co Ltd.

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33 Adjustment of the consolidated financial statements to U.S. GAAP As its shares are listed on the New York Stock Exchange, Eni presents an Annual Report (Form 20-F) to the Securities and Exchange Commission (SEC). The following information is necessary to adjust the Italian consolidated annual report for the 2005 to generally accepted accounting principles in the United States (U.S. GAAP). Summary of significant differences between IFRS and U.S. GAAP Enis financial statements at 31 December 2005 have been prepared in accordance the International Financial Reporting Standards (IFRS) 16 adopted by the European Commission, which differ in certain respects from U.S. GAAP. A description of the significant differences and their effects on net profit and shareholders equity is set forth in the following notes 17 . Compared with the Italian accounting principles adopted until 31 December 2004 the differences between IFRS and U.S. GAAP are considerably less. A) CONSOLIDATION POLICY Enis consolidation policy is described under Principles of consolidation of the Notes to the Consolidated Financial Statements. In particular, under IFRS, the consolidated financial statements include also companies in which Eni holds less than 50% of the voting rights, but over which it exercises control in shareholders meetings. Under U.S. GAAP, investments of less than 50% are accounted for by applying the equity method. Saipem SpA (43.26%), and its subsidiaries which are controlled by Eni without holding the majority of voting rights, have been consolidated under the equity method for U.S. GAAP purposes. B) EXPLORATION & PRODUCTION ACTIVITIES Exploration Under IFRS, the internationally specific criteria have been applied for hydrocarbons exploration and production activities. In particular, exploration costs, including successful exploratory wells, are recorded as intangible assets and are amortized in full in the period incurred (i.e. expensed as incurred for financial reporting purposes). Costs for the acquisition of exploration permits are capitalized and amortized over the expected period of benefit. Under U.S. GAAP, costs relating to exploratory wells are initially capitalized as incomplete wells and other until it is determined if commercial quantities of reserves have been discovered (successful efforts method). That determination is made after completion of drilling the well, and the capitalized costs are either charged to expense or reclassified as part of Enis proved mineral interests. Costs of exploratory wells that have found commercially producible quantities of reserves that cannot be classified as proved remain capitalized after the completion of drilling if: (i) such wells have found a sufficient quantity of reserves to justify completion as a producing wells; (ii) the enterprise is making sufficient progress assessing the reserves and the economic and operating viability of the project. If either condition is not met or if an enterprise obtains information that raises substantial doubt about the economic or operational viability of the project, the exploratory well is assumed to be impaired, and its costs, net of any salvage value, are charged to expense. Capitalized well costs related to proved properties are amortized over proved developed reserves on the basis of units of production. Other exploration costs, including geological and geophysical surveys, are expensed when incurred. Development Development costs are those costs incurred to obtain access to proved reserves and to provide facilities for extracting, treating, gathering and storing oil and gas. Costs to operate and maintain wells and field equipment are expensed as incurred. Under IFRS, costs of unsuccessful development wells are expensed immediately. Costs of successful development wells are capitalized and amortized on the basis of units of production. Under U.S. GAAP, costs of productive wells and development dry holes, both tangible and intangible, are capitalized and amortized on the unit-of-production method.

| (16) | There are no
relevant differences between the accounting principles
approved by the European Commission and the ones issued
by IASB. |
| --- | --- |
| (17) | Eni adopted the
requirements of SEC which permit to the companies that
apply IFRS accounting principles to include comparative
figures of one prior period. |

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C) VALUATION OF ASSETS AND SUBSEQUENT REVALUATION Both IFRS and U.S. GAAP require that assets which are impaired be written down to their fair value, with the exception of the following aspects. Under IFRS, in order to determine whether an impairment exists, the book value of an asset in question is compared with its recoverable amount which is represented by the greater of fair value, net of disposal costs and value in use which is calculated by discounting estimated cash flows arising from the use of the asset and its sale at the end of its useful life. Impairment charges of assets different from goodwill are reversed when the situation giving rise to an impairment ceases to exist. Under U.S. GAAP, the recoverability of the value of an asset used in the production process is first checked by comparing the carrying amount with the sum of undiscounted cash flows expected from use of the asset and its disposal at the end of its useful life. Only if the result of this first check is negative does the entity write the asset down using discounted future cash flows. Under U.S. GAAP reversals of impairment charges are not permitted. D) DEFERRED TAX ASSETS AND LIABILITIES Under IFRS, taxes payable relating to certain potential distributions from shareholders equity or upon liquidation of a company are accrued only to the extent such distributions are planned. Under U.S. GAAP, deferred tax liabilities are recognized regardless of expected distribution of dividends or the disposal of investments. However, U.S. GAAP does not require the accrual of deferred taxes when the investment is a foreign subsidiary and there is sufficient evidence that profits will remain permanently invested in the entity. The adjustments included in Note 34 include the recognition of deferred taxes on undistributed earnings of subsidiaries and deferred taxes on acquired temporary differences. The adjustments also include the deferred tax effect of U.S. GAAP adjustments. The adjustment relating to the results of 2005 includes the impact of the circumstance that starting on 1 January 2005, the Company recorded for U.S. GAAP purposes the tax effects of temporary differences of activities conducted under the terms of certain production sharing arrangements where the companys income tax liability is paid out of Enis share of oil and gas production. The effect of recording did not have a material effect on the companys results of operations. E) INTANGIBLE ASSETS Under U.S. GAAP intangible assets include the recording, separately from goodwill, of assets acquired in or following business combinations arising from legal or contractual rights regardless of their ability to be transferred and of other assets owned by the entity that can be transferred individually or together with other assets and liabilities. If such intangible assets have definite lives they are amortized by the straight line method over their useful lives. IFRS are consistent with U.S. GAAP. However, considering that in the first application of IFRS, Eni has decided not to restate business combinations, the value of the intangible assets described is recorded in the item Goodwill. Both under U.S. GAAP and IFRS, goodwill and intangible assets with an indefinite useful life are not amortized; these assets are subject to a yearly evaluation in order to define the relevant impairment if needed. Such accounting principles have been adopted starting from 1 January 2002 for U.S. GAAP and 1 January 2004 for IFRS. The adjustments for the reconciliation of the shareholders equity included in Note 34 concern the reversal of the amortization of goodwill for the years 2002 and 2003. F) INVENTORIES Under U.S. GAAP, crude oil, petroleum products and natural gas inventories are calculated using the LIFO method. Under IFRS the LIFO method is not permitted. G) GUARANTEES Under IFRS, guarantees are recorded in the item Commitments and contingencies; when it is probable or certain that a guarantee will produce a liability, its estimated amount is accrued in a specific reserve. U.S. GAAP requires a company to recognize a liability for the obligations it has undertaken upon issuing a guarantee. This liability is to be recorded at the inception of a guarantee and is measured at fair value. This difference did not generate a significant difference between U.S. GAAP and IFRS.

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34 Reconciliation of net profit and shareholders equity determined under IFRS to U.S. GAAP The following is a summary of the significant adjustments to net profit for 2004 and 2005 and to shareholders equity as of 31 December 2004 and as of 31 December 2005 that would be required if U.S. GAAP had been applied instead of IFRS in the consolidated financial statements.

(million euro) 2004 2005

| Net profit according to the financial
statements prepared under IFRS | 7,059 | | 8,788 | |
| --- | --- | --- | --- | --- |
| Items
increasing (decreasing) reported net profit: | | | | |
| A. effect of the differences related to
companies consolidated under IFRS but carried at equity
method under U.S. GAAP | (1 | ) | | |
| B.
successful-efforts accounting | (82 | ) | 47 | |
| C. elimination of assets impairments and
revaluations | 5 | | | |
| D.
deferred income taxes | (21 | ) | (279 | ) |
| E. assets associated to the acquisition of a
company (portfolio of clients) | (5 | ) | (5 | ) |
| F.
inventories | (316 | ) | (956 | ) |
| Effect of the difference between IFRS and U.S.
GAAP on investments accounted for using the equity method | 34 | | 12 | |
| Other
adjustments | (280 | ) | (3 | ) |
| Effect of U.S. GAAP adjustments on minority
interest (a) | 8 | | (21 | ) |
| Net
adjustment | (658 | ) | (1,205 | ) |
| Net profit in accordance with U.S. GAAP | 6,401 | | 7,583 | |
| Basic
profit per share (b) | 1.70 | | 2.02 | |
| Diluted profit per share (b) | 1.70 | | 2.01 | |
| Basic
profit per ADS (based on two shares per ADS) (b) | 3.39 | | 4.03 | |
| Diluted profit per ADS (based on two shares per
ADS) (b) | 3.39 | | 4.03 | |

| (a) | Adjustment to
account for minority interest portion of differences A
through F, which include 100% of differences between IFRS
and U.S. GAAP on less than wholly-owned subsidiaries. |
| --- | --- |
| (b) | Amounts in euro. |

(million euro) 31.12.2004 31.12.2005

| Shareholders
equity according to the financial statements prepared
under IFRS | 32,374 | | 36,868 | |
| --- | --- | --- | --- | --- |
| Items increasing (decreasing) reported
shareholders equity (a) : | | | | |
| A. effect
of the differences related to companies consolidated
under IFRS but carried at equity method under U.S. GAAP | 61 | | 37 | |
| B. successful-efforts accounting | 2,072 | | 2,504 | |
| C.
elimination of assets impairments and revaluations | 231 | | 230 | |
| D. deferred income taxes | (2,982 | ) | (3,415 | ) |
| E.
goodwill | 846 | | 811 | |
| F. assets associated to the acquisition of a
company (portfolio of clients) | (11 | ) | (16 | ) |
| G.
inventories | (1,080 | ) | (2,036 | ) |
| Effect of the difference between IFRS and U.S.
GAAP on investments accounted for using the equity method | 269 | | 173 | |
| Other
adjustments | (137 | ) | | |
| Effect of U.S. GAAP adjustments on minority
interest (b) | 6 | | (31 | ) |
| Net
adjustment | (725 | ) | (1,743 | ) |
| Shareholders equity in accordance with
U.S. GAAP | 31,649 | | 35,125 | |

| (a) | Items
increasing (decreasing) reported shareholders
equity of foreign companies are translated into euro at
the exchange rate prevailing at the end of each period. |
| --- | --- |
| (b) | Adjustment to account for
minority interest portion of differences A through G,
which include 100% of differences between IFRS and U.S.
GAAP on less than wholly-owned subsidiaries. |

Shareholders equity under U.S. GAAP includes other comprehensive income, in negative, of euro 3,531 and euro 1,683 million as of 31 December 2004 and 2005, respectively. Such other comprehensive income primarily relates to exchange rate differences due to the translation of financial statements prepared in currencies other than the euro; amounts described are gross of deferred income taxes.

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The consolidated balance sheets, if determined under U.S. GAAP would have been as follows:

(million euro) 31.12.2004 31.12.2005

ASSETS
Current assets
Cash and
cash equivalent	988		1,121
Other financial assets for trading or held for
sale	1,475		1,484
Trade and
other receivables	13,268		17,971
Inventories	2,273		1,929
Income tax
receivables	636		575
Other current assets	494		387
Total
current assets	19,134		23,467
Non-current assets
Property,
plant and equipment	39,652		43,868
Inventories - compulsory stock	662		1,462
Intangible
assets	5,125		5,244
Investments accounted for using the equity
method	3,892		4,589
Other
investments	439		416
Other financial assets	2,015		1,105
Deferred
tax assets	1,159		1,847
Other non-current assets	276		979
Total
non-current assets	53,220		59,510
TOTAL ASSETS	72,354		82,977
LIABILITIES
AND EQUITY
Current liabilities
Current
financial liabilities	4,474		4,916
Current portion of long-term debt	935		809
Trade and
other payables	9,392		11,552
Taxes payable	2,423		3,296
Other
current liabilities	594		648
Total current liabilities	17,818		21,221
Non-current
liabilities
Long-term debt	7,288		7,229
Reserves
for contingencies and charges	5,720		7,615
Provisions for employee benefits	746		939
Deferred
tax liabilities	6,367		8,370
Other non-current liabilities	461		1,015
Total
non-current liabilities	20,582		25,168
TOTAL LIABILITIES	38,400		46,389
SHAREHOLDERS
EQUITY
Minority interests	2,305		1,463
Eni
shareholders equity:
Share capital: 4,005,358,876 fully paid shares
nominal value euro 1 each (4,004,424,476 shares at 31
December 2004)	4,004		4,005
Other
reserves	24,473		27,753
Net profit	6,401		7,583
Treasury
shares	(3,229	)	(4,216	)
Eni shareholders equity	31,649		35,125
Total
shareholders equity	33,954		36,588
TOTAL LIABILITIES AND SHAREHOLDERS
EQUITY	72,354		82,977

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Fixed assets determined under U.S. GAAP consist of the following:

(million euro) 31.12.2004 31.12.2005

| Fixed
assets, gross: — - Exploration & Production | 39,584 | 47,882 | |
| --- | --- | --- | --- |
| - Gas
& Power | 20,106 | 21,514 | |
| - Refining & Marketing | 8,568 | 9,059 | |
| -
Petrochemicals | 3,793 | 3,923 | |
| - Oilfield Services Construction and Engineering | 110 | 72 | |
| - Other
activities | 1,511 | 1,413 | |
| - Corporate and financial companies | 191 | 212 | |
| -
Elimination of intra-group profits | | (88 | ) |
| | 73,863 | 83,987 | |
| Accumulated
depreciation and amortization: | | | |
| - Exploration & Production | 18,155 | 22,786 | |
| - Gas
& Power | 6,896 | 7,754 | |
| - Refining & Marketing | 5,214 | 5,503 | |
| -
Petrochemicals | 2,564 | 2,715 | |
| - Oilfield Services Construction and Engineering | 69 | 56 | |
| - Other
activities | 1,229 | 1,221 | |
| - Corporate and financial companies | 84 | 88 | |
| -
Elimination of intra-group profits | | (4 | ) |
| | 34,211 | 40,119 | |
| Fixed
assets, net: | | | |
| - Exploration & Production | 21,429 | 25,096 | |
| - Gas
& Power | 13,210 | 13,760 | |
| - Refining & Marketing | 3,354 | 3,556 | |
| -
Petrochemicals | 1,229 | 1,208 | |
| - Oilfield Services Construction and Engineering | 41 | 16 | |
| - Other
activities | 282 | 192 | |
| - Corporate and financial companies | 107 | 124 | |
| -
Elimination of intra-group profits | | (84 | ) |
| | 39,652 | 43,868 | |

With regard to the profit and loss account, operating profit (loss) by industry segment and profit before income taxes, as determined under U.S. GAAP, would have been as follows:

(million euro) 2004 2005

| Operating profit (loss) by industry segment — Exploration
& Production | 7,946 | | 12,672 | |
| --- | --- | --- | --- | --- |
| Gas & Power | 3,371 | | 3,237 | |
| Refining
& Marketing | 811 | | 881 | |
| Petrochemicals | 281 | | 202 | |
| Oilfield
Services Construction and Engineering | (52 | ) | 1 | |
| Other activities | (364 | ) | (935 | ) |
| Corporate
and financial companies | (254 | ) | (389 | ) |
| Elimination of intra-group profits | | | (141 | ) |
| | 11,739 | | 15,528 | |
| Net profit before income taxes | 12,324 | | 16,281 | |

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35 Additional financial statement disclosures required by U.S. GAAP and the SEC Charges related to asset retirement obligations (SFAS 143) Changes in asset retirement obligations during the year were:

(million euro) 2004 2005

| Asset retirement obligations as of 1 January — New
obligations incurred during the year | 1,950 — 193 | | 1,959 — 311 | |
| --- | --- | --- | --- | --- |
| Accretion discount | 80 | | 106 | |
| Revisions
of previous estimates | 40 | | 277 | |
| Spending on existing obligations | (32 | ) | (107 | ) |
| Property
dispositions | (234 | ) | | |
| Foreign currency translation | (36 | ) | 110 | |
| Other
adjustments | (2 | ) | (10 | ) |
| Asset retirement obligations as of 31
December | 1,959 | | 2,646 | |

Comprehensive income U.S. GAAP requires the reporting and display of comprehensive income and its components in accordance with Statement of Financial Accounting Standards No. 130, Reporting Comprehensive Income (SFAS 130). Components of other comprehensive income include variations in equity accounts not attributable to transactions already recorded in income or transactions with shareholders. Deferred tax effects of exchange differences from the translation of functional currency financial statements have not been recorded as provided for by SFAS 109, which permits the exclusion of the calculation of taxes on equity reserves of foreign subsidiaries when the reserves are not expected to be released.

(million euro) 2004 2005

Net income in accordance with U.S. GAAP	6,401		7,583
Other
comprehensive income (loss) for the period gross of
income taxes
Fair value of marketable securities	5		22
Exchange
differences from translation of financial statements
denominated in currency other than euro	(846	)	1,711
Exchange differences from translation in the
period and other changes	13		217
	(828	)	1,950
Net comprehensive income for the period
according to U.S. GAAP	5,573		9,533

Income taxes The following information is presented according to Statement of Financial Accounting Standards No. 109 Accounting for Income Taxes. Domestic and foreign components of pre-tax income are as follows:

(million euro) 2004 2005

Domestic	5,468	4,727
Foreign	6,856	11,554
	12,324	16,281

The provisions for income taxes are as follows:

(million euro) 2004 2005

Current	4,470	7,217
Deferred	1,112	1,116
	5,582	8,333

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The reconciliation of the income tax provision calculated under Italian tax regulation by applying a 33% rate (Ires - national corporate income tax) to pre-tax income and 4.25% (Irap - regional income tax) to net value of production, to the provision for income taxes recorded on a U.S. GAAP basis in the consolidated statements of income is as follows:

(million euro) 2004 2005

| Income before tax in accordance with U.S.
GAAP — Italian
statutory tax rate (state and local) | 12,324 — 38.3 | | 16,281 — 37.9 | |
| --- | --- | --- | --- | --- |
| Expected income tax provision in
accordance with U.S. GAAP at Italian statutory tax rate | 4,714 | | 6,176 | |
| Effect of
items increasing (decreasing) the Italian statutory tax
rate: | | | | |
| - taxation of foreign operations at rates
different from Italian statutory tax rate | 835 | | 1,946 | |
| - taxes on
distributable reserves | 446 | | 252 | |
| - permanent differences | (143 | ) | 131 | |
| -
devaluation/revaluation of deferred tax assets | (218 | ) | (52 | ) |
| - benefits deriving from the application of
favorable tax laws | (8 | ) | (11 | ) |
| - other | (44 | ) | (109 | ) |
| | 5,582 | | 8,333 | |

Income taxes in accordance with U.S GAAP NET DEFERRED TAX LIABILITIES The tax effects of significant temporary differences causing the tax liabilities are as follows:

(million euro) 31.12.2004 31.12.2005

| Deferred
tax liabilities: — - accelerated depreciation | 4,672 | | 6,006 | |
| --- | --- | --- | --- | --- |
| -
distributable reserves subject to taxes in case of
distribution | 2,970 | | 3,212 | |
| - excess cost paid for the acquisition of
consolidated investments | 1,033 | | 485 | |
| -
successful-efforts method accounting | 467 | | 690 | |
| - capitalization of interest expense | 246 | | 245 | |
| - reserves
for uncollectible receivables | 137 | | 84 | |
| - release of excess contingency reserves | 83 | | 50 | |
| - gains
taxable in the future | 46 | | 34 | |
| - other | 378 | | 1,151 | |
| | 10,032 | | 11,957 | |
| Deferred tax assets: | | | | |
| - accruals
for doubtful accounts and contingencies | (2,045 | ) | (1,949 | ) |
| - revaluation of assets in accordance with Law
342/2000 and 448/2001 | (2,000 | ) | (1,186 | ) |
| - tax loss
carryforwards | (1,072 | ) | (510 | ) |
| - undeductible expense on investments | (472 | ) | (237 | ) |
| - losses
on investments and subsidiaries in excess of currently
allowable tax deductions | (225 | ) | (135 | ) |
| - undeductible depreciation and amortization of
assets | (432 | ) | (904 | ) |
| - other | (599 | ) | (1,062 | ) |
| | (6,845 | ) | (5,983 | ) |
| Less: | | | | |
| - valuation allowance | 2,021 | | 549 | |
| | (4,824 | ) | (5,434 | ) |
| Net deferred tax liabilities | 5,208 | | 6,523 | |

The valuation allowance relates to deferred tax assets of euro 549 million (euro 2,021 million at 31 December 2004) of consolidated companies whose expected future fiscal profits are not considered sufficient for the utilization of these assets.

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TAX LOSS CARRYFORWARDS The difference in gross tax loss carryforwards between IFRS and U.S. GAAP relates to the companies which are consolidated under IFRS (see Note 21), but excluded from consolidation according to U.S. GAAP. Investments At 31 December 2004 and 2005, investments accounted for under the equity method of euro 3,892 million and euro 4,589 million, respectively, include shares of Saipem SpA, which is publicly listed on the Italian Stock Exchange. The following information includes its fair value:

Enis number of shares Equity ratio (%) Share price (euro) Market value (million euro)

| 31
December 2004 — Saipem SpA | 189,423,307 | 43.29 | 8.864 | 1,679 |
| --- | --- | --- | --- | --- |
| 31
December 2005 | | | | |
| Saipem SpA | 189,423,307 | 43.26 | 13.793 | 2,613 |

In 2004 and 2005, Saipem SpA is included in the consolidation under IFRS, while, under U.S. GAAP, it is valued under the equity method. Information about Saipem SpA and its subsidiaries, representing a 100% share of the companies, is as follows:

(million euro) 31.12.2004 31.12.2005

| Total
assets | 5,137 | 5,952 |
| --- | --- | --- |
| Total liabilities | 3,592 | 4,309 |

(million euro) 2004 2005

Net sales from operations	4,306	4,528
Operating
income	328	365
Net income	235	255

Concentrations and certain significant estimates The following information is presented according to Statement of Position 94-6 Disclosures of Certain Significant Risks and Uncertainties. NATURE OF OPERATIONS Eni is an integrated energy company operating in the oil and gas, electricity generation, petrochemicals and oilfield services and engineering industries. EXPLORATION & PRODUCTION : through Exploration & Production Division and subsidiaries, Eni engages in hydrocarbon exploration and production in Italy, North Africa (Algeria, Egypt, Libya and Tunisia), West Africa (Angola, Congo and Nigeria), the North Sea (Norway and the United Kingdom), Latin America (Venezuela), the former Soviet Union countries (mainly Kazakhstan), the United States (Gulf of Mexico and Alaska) and Asia (mainly Saudi Arabia, China, India, Indonesia, Iran and Pakistan). In 2005 approximately 68% of oil production sold was supplied to Enis Refining & Marketing segment and approximately 29% of natural gas production sold was supplied to Enis Gas & Power segment. Eni owns a storage system, made up by eight depleted fields, which is used for the modulation of supply in accordance with seasonal swings in demand (natural gas is stored in the summer and used in the winter), as strategic reserve to ensure supply and to support domestic production through mineral storage. Storage assets are owned by Stoccaggi Gas Italia (Eni 100%), a company constituted in accordance with Law Decree No. 164 of 23 May 2000 that introduced laws for the liberalization of the Italian natural gas market.

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GAS & POWER : Eni is engaged in the supply, transmission and sale of natural gas in Italy and outside Italy through its Gas & Power Division, which was constituted by the incorporation of Snam SpA into Eni SpA in 2002, and through certain subsidiaries. Approximately 87% of total purchases are purchased from foreign sources (primarily Algeria, Russia, The Netherlands and Norway) under long-term contracts, which contain take-or-pay provisions, and transported to Italy through a network of over 4,300 kilometers international pipelines of which Eni owns the transmission rights. The remaining purchases in Italy are obtained principally from domestic gas produced by Enis Exploration & Production segment. Through an approximately 30,700-kilometer long network (corresponding to 96% of the Italian domestic natural gas network), Eni supplies natural gas to residential and commercial users (civil market), industrial users and the thermoelectric segment. Snam Rete Gas (Eni 50.05%), that was constituted in accordance with Law Decree No. 164/2000, owns the pipelines network used by Eni. Snam Rete Gas, a company listed on the Italian stock exchange, engages in natural gas transportation activities also for other operators of the segment. Following the merging of Italgas Più, Eni supply natural gas directly to approximately 5 million customers in the residential and commercial segment. Through Italgas (Eni 100%), Eni is engaged in domestic distribution of natural gas in Italy through an approximately 48,000-kilometer long network. Eni is engaged in distribution and sale of natural gas to residential and commercial customers outside Italy, in Argentina through Distribuidora de Gas Cuyana, in Hungary through Tigáz and in Slovenia through Adriaplin doo. Legislative Decree No. 164 of 23 May 2000 introduced laws for the liberalization of the Italian natural gas market with great impact on Enis activities, as the company is present in all the phases of the natural gas chain. The most important aspects of the decree are the following: - total free market after 2003; - until 31 December 2010 the imposition of thresholds to operators in relation to a percentage share of domestic consumption set as follows: (i) 75%, by 2002, for imported or domestically produced natural gas volumes introduced in the domestic transmission network in order to sell it. This percentage decreases by 2 percentage points per year until it reaches 61% in 2009; (ii) 50% from 1 January 2003 for sales to final customers. These ceilings are calculated net of own consumption and, in case of sales, also net of losses. In 2005 Enis presence in the Italian natural gas market was in accordance with the above limitations; - tariffs for transport infrastructure, storage, use of LNG terminals and distribution networks are set by the Authority for Electricity and Gas; - third parties are allowed to access natural gas infrastructure according to set conditions. Eni through EniPower SpA (Eni 100%) and subsidiaries is engaged managing Enis electricity business at the power plants located in the Ferrera Erbognone, Ravenna, Livorno, Taranto, Mantova, Brindisi and Ferrara industrial sites with installed capacity of 4.5 gigawatts and a production sold of 22.77 terawatthours. The demand for gas and fuel oils of EniPowers stations is met by Eni supplies. REFINING & MARKETING : Eni, through its Refining & Marketing Division, which was constituted by the incorporation of AgipPetroli SpA in Eni SpA in 2002 and certain subsidiaries, engages in petroleum refining and marketing activities primarily in Italy and Europe. Eni is the largest refiner of petroleum products in Italy in terms of overall refining capacity. Approximately 56% of crude oil sold is purchased from Enis Exploration & Production segment, the rest is purchased from producing countries pursuant to purchase contracts (22%) and in international spot markets (22%), while the remainder is obtained. Approximately 58% of the purchased crude oil is refined. 32% of oil refined derives from the production of Enis Exploration & Production segment.

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PETROCHEMICALS : through Polimeri Europa SpA and subsidiaries (Eni 100%), Eni engages in manufacturing of olefins, aromatics, intermediate products, styrene and elastomers. Enis petrochemicals production is concentrated in Italy, the other operations being primarily in Western Europe. Approximately 23% of the oil-based feedstock requirements used by petrochemical plants are supplied by Enis Refining & Marketing segment. OILFIELD SERVICES CONSTRUCTION AND ENGINEERING : through Saipem SpA (Eni 43%), a company listed on the Italian stock exchange, and its subsidiaries, Eni is engaged in construction and drilling services to customers in the oil and gas industries. Through Snamprogetti SpA (Eni 100%) and subsidiaries, Eni is a leading provider of engineering and project management services to customers in the oil and gas and petrochemical industries. At 31 December 2005 approximately 7% of the order backlog of Enis Oilfield Services, Construction and Engineering segment related to orders from Eni Group companies.

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Supplemental oil and gas information (unaudited) The following information is presented in accordance with Statement of Financial Accounting Standards No. 69, Disclosures about Oil & Gas Producing Activities. Amounts related to minority interests are not significant. CAPITALIZED COSTS Capitalized costs represent the total expenditures for proved and unproved mineral interests and related support equipment and facilities utilized in oil and gas exploration and production activities, together with related accumulated depreciation, depletion and amortization.

(million euro) Italy North Africa West Africa North Sea Rest of World Total

| At 31
December 2004 — Proved mineral interests (a) | 9,056 | | 7,192 | | 6,288 | | 7,198 | | 7,698 | | 37,432 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Unproved
mineral interests | | | 272 | | 70 | | 561 | | 1,103 | | 2,006 | |
| Support equipment and facilities | 252 | | 1,056 | | 209 | | 33 | | 75 | | 1,625 | |
| Incomplete
wells and other | 662 | | 468 | | 1,038 | | 397 | | 882 | | 3,447 | |
| Gross Capitalized Costs | 9,970 | | 8,988 | | 7,605 | | 8,189 | | 9,758 | | 44,510 | |
| Accumulated
depreciation, depletion and amortization | (6,416 | ) | (3,887 | ) | (3,907 | ) | (3,733 | ) | (3,252 | ) | (21,195 | ) |
| Net Capitalized Costs | 3,554 | | 5,101 | | 3,698 | | 4,456 | | 6,506 | | 23,315 | |
| At 31
December 2005 | | | | | | | | | | | | |
| Proved mineral interests (a) | 9,756 | | 9,321 | | 8,733 | | 8,350 | | 9,463 | | 45,623 | |
| Unproved
mineral interests | 33 | | 197 | | 134 | | 413 | | 1,265 | | 2,042 | |
| Support equipment and facilities | 253 | | 1,385 | | 272 | | 33 | | 93 | | 2,036 | |
| Incomplete
wells and other | 657 | | 638 | | 728 | | 221 | | 1,895 | | 4,139 | |
| Gross Capitalized Costs | 10,699 | | 11,541 | | 9,867 | | 9,017 | | 12,716 | | 53,840 | |
| Accumulated
depreciation, depletion and amortization | (6,888 | ) | (5,113 | ) | (5,193 | ) | (4,619 | ) | (4,697 | ) | (26,510 | ) |
| Net Capitalized Costs consolidated | 3,811 | | 6,428 | | 4,674 | | 4,398 | | 8,019 | | 27,330 | |
| Net
Capitalized Costs affiliates and joint ventures (b) | | | 13 | | 66 | | | | 157 | | 236 | |
| Net Capitalized Costs | 3,811 | | 6,441 | | 4,740 | | 4,398 | | 8,176 | | 27,566 | |

| (a) | Includes
capitalized costs for wells and facilities related to
proved reserves. |
| --- | --- |
| (b) | Starting from
2005 are included data related to affiliates and joint
ventures evaluated with equity method. |

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COST INCURRED Costs incurred represent amounts both capitalized and expensed in connection with oil and gas producing activities.

(million euro) Italy North Africa West Africa North Sea Rest of World Total

| Year
ended 31 December 2003 — Proved property acquisitions | | | | 308 | 8 | 316 |
| --- | --- | --- | --- | --- | --- | --- |
| Unproved
property acquisitions | | | | 125 | 6 | 131 |
| Exploration | 67 | 80 | 138 | 125 | 243 | 653 |
| Development (a) | 449 | 1,106 | 1,268 | 286 | 1,454 | 4,563 |
| Total costs incurred (b) | 516 | 1,186 | 1,406 | 844 | 1,711 | 5,663 |
| Year
ended 31 December 2004 | | | | | | |
| Exploration | 64 | 104 | 71 | 66 | 194 | 499 |
| Development (a) | 431 | 965 | 881 | 391 | 1,407 | 4,075 |
| Total costs incurred | 495 | 1,069 | 952 | 457 | 1,601 | 4,574 |
| Year
ended 31 December 2005 | | | | | | |
| Proved property acquisitions | 19 | | 16 | | 99 | 134 |
| Unproved
property acquisitions | 13 | | 44 | | 99 | 156 |
| Exploration | 45 | 153 | 75 | 127 | 264 | 664 |
| Development (a) | 644 | 960 | 909 | 528 | 1,396 | 4,437 |
| Total costs incurred consolidated | 721 | 1,113 | 1,044 | 655 | 1,858 | 5,391 |
| Total
costs incurred affiliates and joint ventures (c) | | 2 | 22 | | 25 | 49 |
| Total costs incurred | 721 | 1,115 | 1,066 | 655 | 1,883 | 5,440 |

| (a) | Includes for
assets retirement obligations pursuant to SFAS 143
Accounting for asset retirement obligations
euro 84 million of costs capitalized during 2003, euro
233 million for 2004 and euro 588 million for 2005. |
| --- | --- |
| (b) | Includes
costs for acquisition of Fortum Petroleum AS (now Eni
Norge AS) of euro 434 million, net of the related
gross-up for deferred taxes of euro 514 million. The
amount has been allocated to the North Sea area as
follows: (i) Proved property acquisitions euro 308
million, (ii) Unproved property acquisitions euro 109
million, (iii) Exploration euro 17 million. |
| (c) | Starting from 2005 are included data
related to affiliates and joint ventures evaluated with
equity method. |

RESULTS OF OPERATIONS FROM OIL AND GAS PRODUCING ACTIVITIES Results of operations from oil and gas producing activities, including gas storage services used to modulate the seasonal variation of demand, represent only those revenues and expenses directly associated to such activities including operating overheads. These amounts do not include any allocation of interest expense or general corporate overhead and, therefore, are not necessarily indicative of the contributions to consolidated net earnings of Eni. Related income taxes are computed by applying the local income tax rates to the pre-tax income from producing activities. Eni is a party to certain Production Sharing Agreements (PSAs) whereby a portion of Enis share of oil and gas production is withheld and sold by its joint venture partners which are state-owned entities, with proceeds being remitted to the state in satisfaction of Enis PSA related tax liabilities. Revenue and income taxes include such taxes owed by Eni but paid by state-owned entities out of Enis share of oil and gas production.

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(million euro) Italy North Africa West Africa North Sea Rest of World Total

Year ended 31 December 2003
Revenues:
- sales to
affiliates	2,609		1,469		1,946		1,913		345		8,282
- sales to unaffiliated entities	153		1,188		164		822		1,595		3,922
Total
revenues	2,762		2,657		2,110		2,735		1,940		12,204
Operations costs	(222	)	(316	)	(283	)	(446	)	(235	)	(1,502	)
Production
taxes	(136	)	(97	)	(235	)	(11	)	(79	)	(558	)
Exploration expenses	(89	)	(70	)	(113	)	(96	)	(276	)	(644	)
DD&A
and Provision for abandonment (a)	(458	)	(420	)	(377	)	(759	)	(734	)	(2,748	)
Other income and (expenses)	(170	)	(264	)	(121	)	14		(289	)	(830	)
Accretion
discount (SFAS 143)	(37	)	(5	)	(14	)	(42	)	(4	)	(102	)
Pretax income from producing activities	1,650		1,485		967		1,395		323		5,820
Estimated
income taxes	(629	)	(788	)	(617	)	(750	)	(111	)	(2,895	)
Results of operations from E&P activities	1,021		697		350		645		212		2,925
Year
ended 31 December 2004
Revenues:
- sales to
affiliates	2,633		1,868		2,762		2,083		508		9,854
- sales to unaffiliated entities	148		1,364		306		709		2,086		4,613
Total
revenues	2,781		3,232		3,068		2,792		2,594		14,467
Operations costs	(223	)	(292	)	(322	)	(405	)	(289	)	(1,531	)
Production
taxes	(118	)	(91	)	(379	)	(13	)	(163	)	(764	)
Exploration expenses	(57	)	(47	)	(71	)	(93	)	(155	)	(423	)
DD & A
and Provision for abandonment (a)	(489	)	(437	)	(482	)	(687	)	(849	)	(2,944	)
Other income and (expenses)	(98	)	(368	)	(216	)	97		(208	)	(793	)
Accretion
discount (SFAS 143)	(37	)	(5	)	(17	)	(15	)	(6	)	(80	)
Pretax income from producing activities	1,759		1,992		1,581		1,676		924		7,932
Estimated
income taxes	(632	)	(994	)	(945	)	(948	)	(305	)	(3,824	)
Results of operations from E&P activities	1,127		998		636		728		619		4,108
Year
ended 31 December 2005
Revenues:
- sales to
affiliates	3,133		2,813		4,252		2,707		828		13,733
- sales to unaffiliated entities	161		2,579		394		889		2,883		6,906
Total
revenues	3,294		5,392		4,646		3,596		3,711		20,639
Operations costs	(261	)	(390	)	(363	)	(417	)	(338	)	(1,769	)
Production
taxes	(157	)	(98	)	(513	)	(15	)	(207	)	(990	)
Exploration expenses	(32	)	(59	)	(38	)	(125	)	(181	)	(435	)
DD&A
and Provision for abandonment (a)	(512	)	(711	)	(632	)	(710	)	(1,007	)	(3,572	)
Other income and (expenses)	(205	)	(400	)	(176	)	55		(251	)	(977	)
Accretion
discount (SFAS 143)	(45	)	(9	)	(15	)	(31	)	(6	)	(106	)
Pretax income from producing activities	2,082		3,725		2,909		2,353		1,721		12,790
Estimated
income taxes	(762	)	(2,197	)	(1,818	)	(1,386	)	(580	)	(6,743	)
Results of operations from E&P activities
consolidated	1,320		1,528		1,091		967		1,141		6,047
Results of
operations from E&P activities, affiliates and joint
ventures (b)					6				(19	)	(13	)
Total results of operations from E&P
activities	1,320		1,528		1,097		967		1,122		6,034

| (a) | Includes
assets impairments amounting for euro 210 million for
2003, euro 300 million for 2004 and euro 147 million for
2005. |
| --- | --- |
| (b) | Starting from
2005 are included data related to affiliates and joint
ventures evaluated with equity method. |

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OIL AND NATURAL GAS RESERVES Proved oil and gas reserves are the estimated quantities of crude oil, natural gas and natural gas liquids which geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under technical, contractual, economic and operating conditions existing at the time. Prices include consideration of changes in existing prices provided only by contractual arrangements, but not on escalations based upon future conditions. Net proved reserves exclude royalties and interests owned by others. Proved developed oil and gas reserves are proved reserves that can be estimated to be recovered through existing wells with existing equipment and operating methods. Proved undeveloped oil and gas reserves are reserves that are expected to be recovered from new wells on undrilled acreage, or from existing wells where a relatively major expenditure is required for completion. Additional oil and gas reserves expected to be obtained through the application of fluid injection or other improved recovery techniques for supplementing natural forces and mechanisms of primary recovery are included as proved developed reserves only after testing by a pilot project or after the operation of an installed program has confirmed, through production response, that increased recovery will be achieved. Enis proved reserves have been estimated on the basis of the applicable U.S. Securities & Exchange Commission regulation, Rule 4-10 of Regulation S-X and its interpretations and have been disclosed in accordance with Statement of Financial Accounting Standard No. 69. The estimates of proved reserves, developed and undeveloped for years ended 31 December 2002, 2003, 2004 and 2005 are based on data prepared by Eni. Since 1991 Eni has requested qualified independent oil engineering companies to carry out an independent evaluation 18 of its proved reserves on a rotative basis. In particular a total of 1.64 billion boe of proved reserves, or about 24% of Enis total proved reserves at 31 December 2005, have been evaluated. The results of this independent evaluation confirmed Enis evaluations, as in previous years. In the 2003-2005 three-year period, 84% of Enis total proved reserves were subject to independent evaluations. Eni operates under Production Sharing Agreements (PSAs) in several of the foreign jurisdictions where it has oil and gas exploration and production activities. Reserves of oil and natural gas to which Eni is entitled under PSA arrangements are shown in accordance with Enis economic interest in the volumes of oil and natural gas estimated to be recoverable in future years. Such reserves include estimated quantities allocated to Eni for recovery of costs, income taxes owed by Eni but settled by its joint venture partners (which are state-owned entities) out of Enis share of production and Enis net equity share after cost recovery. Proved oil and gas reserves associated with PSAs represented 46%, 51% and 48% of total proved reserves as of year-end 2003, 2004 and 2005, respectively, on an oil-equivalent basis. A similar scheme to PSAs applies to Service and Buy-Back contracts; proved reserves associated with such contracts represented 3%, 3% and 2% of total proved reserves on an oil-equivalent basis as of year-end 2003, 2004 and 2005, respectively. Oil and gas reserve quantities include: (i) oil and natural gas quantities in excess to cost recovery which the company has an obligation to purchase under certain PSAs with governments or authorities whereby the company serves as producer of reserves. In accordance with SFAS 69, paragraph 13, reserve volumes associated with such oil and gas quantities represented 1.6%, 1.4% and 1.7% of total proved reserves as of year-end 2003, 2004 and 2005 respectively, on an oil-equivalent basis; (ii) natural gas volumes of natural gas used for own consumption and (iii) volumes of natural gas held in certain Eni storage fields in Italy. Proved reserves attributable to these fields include: (a) the residual natural gas volumes of the reservoirs and (b) natural gas volumes from other Eni fields input into these reservoirs in subsequent periods. Proved reserves do not include volumes owned by or acquired from third parties. Gas withdrawn from storage is produced and thereby detracted from proved reserves when sold. Numerous uncertainties are inherent in estimating quantities of proved reserves and in projecting future rates of production and timing of development expenditures. The accuracy of any reserve estimate is a function of the quality of available data and engineering and geological interpretation and judgement. Results of drilling, testing and production after the date of the estimate may require substantial upward or downward revision. In addition, changes in oil and natural gas prices have an effect on the quantities of Enis proved reserves since estimates of reserves are based on prices and costs relative to the date when such estimates are made. Reserve estimates are also subject to revision as prices fluctuate due to the cost recovery feature under certain PSAs. The following table presents yearly changes in estimated proved reserves, developed and undeveloped, of crude oil (including condensate and natural gas liquids) and natural gas for the years 2003, 2004 and 2005.

(18) From 1991 to 2002 to DeGolyer and MacNaughton, from 2003 also to Ryder Scott Company.

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CRUDE OIL (INCLUDING CONDENSATES AND NATURAL GAS LIQUIDS)

(million barrels)

Proved Oil Reserves Italy North Africa West Africa North Sea Rest of World Total

Reserves at 31 December 2002	255		1,072		1,022		498		936		3,783
Purchase
of Minerals in Place							86				86
Revisions of Previous Estimates	21		51		59		52		153		336
Improved
Recovery			15		16						31
Extensions and Discoveries	6		32		28				214		280
Production	(30	)	(90	)	(87	)	(86	)	(64	)	(357	)
Sales of Minerals in Place							(21	)			(21	)
Reserves
at 31 December 2003	252		1,080		1,038		529		1,239		4,138
Revisions of Previous Estimates	(1	)	(22	)	44		12		(18	)	15
Improved
Recovery			11		48		4				63
Extensions and Discoveries	4		20		34		4		144		206
Production	(30	)	(94	)	(104	)	(74	)	(75	)	(377	)
Sales of Minerals in Place			(2	)	(4	)	(25	)	(6	)	(37	)
Reserves
at 31 December 2004	225		993		1,056		450		1,284		4,008
Purchase of Minerals in Place	2				6				47		55
Revisions
of Previous Estimates	33		36		(47	)	27		(88	)	(39	)
Improved Recovery			43		29				15		87
Extensions
and Discoveries			26		14		21		16		77
Production	(32	)	(111	)	(113	)	(65	)	(83	)	(404	)
Reclassification
2004 affiliates and joint ventures data			(26	)	(9	)			(1	)	(36	)
Reserves at 31 December 2005 consolidated	228		961		936		433		1,190		3,748
Reserves
at 31 December 2005 affiliates and joint ventures (a)			18		6				1		25
Reserves at 31 December 2005	228		979		942		433		1,191		3,773

(million barrels)

Proved Developed Oil Reserves Italy North Africa West Africa North Sea Rest of World Total

| Reserves
at 31 December 2002 | 168 | 610 | 554 | 426 | 483 | 2,241 |
| --- | --- | --- | --- | --- | --- | --- |
| Reserves at 31 December 2003 | 173 | 640 | 560 | 464 | 610 | 2,447 |
| Reserves
at 31 December 2004 | 174 | 655 | 588 | 386 | 668 | 2,471 |
| Reserves at 31 December 2005 consolidated | 149 | 697 | 568 | 353 | 564 | 2,331 |
| Reserves
at 31 December 2005 affiliates and joint ventures (a) | | 15 | 3 | | 1 | 19 |
| Reserves at 31 December 2005 | 149 | 712 | 571 | 353 | 565 | 2,350 |

(a) Starting from 2005 are included data related to affiliates and joint ventures evaluated with equity method.

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NATURAL GAS

(billion cubic feet)

Proved Natural Gas Reserves Italy (a) North Africa West Africa North Sea Rest of World Total

| Reserves
at 31 December 2002 | 5,295 | | 5,563 | | 1,533 | | 1,899 | | 4,339 | | 18,629 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Purchase of Minerals in Place | 10 | | | | | | 425 | | 8 | | 443 | |
| Revisions
of Previous Estimates | (768 | ) | (123 | ) | 172 | | 139 | | 325 | | (255 | ) |
| Extensions and Discoveries | 84 | | 242 | | | | | | 100 | | 426 | |
| Production | (455 | ) | (215 | ) | (49 | ) | (229 | ) | (276 | ) | (1,224 | ) |
| Sales | | | | | | | (11 | ) | | | (11 | ) |
| Reserves
at 31 December 2003 | 4,166 | | 5,467 | | 1,656 | | 2,223 | | 4,496 | | 18,008 | |
| Revisions of Previous Estimates | 105 | | 814 | | 129 | | 75 | | 84 | | 1,207 | |
| Improved
Recovery | | | | | 10 | | | | | | 10 | |
| Extensions and Discoveries | 29 | | 420 | | | | 38 | | 222 | | 709 | |
| Production | (409 | ) | (247 | ) | (66 | ) | (220 | ) | (303 | ) | (1,245 | ) |
| Sales | (73 | ) | (1 | ) | | | (65 | ) | (115 | ) | (254 | ) |
| Reserves
at 31 December 2004 | 3,818 | | 6,453 | | 1,729 | | 2,051 | | 4,384 | | 18,435 | |
| Purchase of Minerals in Place | 63 | | | | 8 | | | | 222 | | 293 | |
| Revisions
of Previous Estimates | 159 | | (6 | ) | (9 | ) | (18 | ) | (368 | ) | (242 | ) |
| Improved Recovery | | | 11 | | | | | | | | 11 | |
| Extensions
and Discoveries | 1 | | 37 | | 309 | | 50 | | 56 | | 453 | |
| Production | (365 | ) | (357 | ) | (70 | ) | (219 | ) | (281 | ) | (1,292 | ) |
| Reclassification
2004 affiliates and joint ventures data | | | (21 | ) | (2 | ) | | | (134 | ) | (157 | ) |
| Reserves at 31 December 2005 consolidated | 3,676 | | 6,117 | | 1,965 | | 1,864 | | 3,879 | | 17,501 | |
| Reserves
at 31 December 2005 affiliates and joint ventures (b) | | | 15 | | 2 | | | | 73 | | 90 | |
| Reserves at 31 December 2005 | 3,676 | | 6,132 | | 1,967 | | 1,864 | | 3,952 | | 17,591 | |

(billion cubic feet)

Proved Developed Natural Gas Reserves Italy (a) North Africa West Africa North Sea Rest of World Total

| Reserves
at 31 December 2002 | 3,397 | 1,084 | 863 | 1,727 | 1,283 | 8,354 |
| --- | --- | --- | --- | --- | --- | --- |
| Reserves at 31 December 2003 | 2,966 | 962 | 866 | 2,075 | 3,355 | 10,224 |
| Reserves
at 31 December 2004 | 2,850 | 1,760 | 924 | 1,845 | 3,122 | 10,501 |
| Reserves at 31 December 2005 consolidated | 2,704 | 3,060 | 1,289 | 1,484 | 2,622 | 11,159 |
| Reserves
at 31 December 2005 affiliates and joint ventures (b) | | 12 | 2 | | 56 | 70 |
| Reserves at 31 December 2005 | 2,704 | 3,072 | 1,291 | 1,484 | 2,678 | 11,229 |

| (a) | Including
approximately 779, 747, 737 and 760 billions of cubic
feet of natural gas held in storage at 31 December 2002,
2003, 2004 and 2005 respectively. |
| --- | --- |
| (b) | Starting from
2005 are included data related to affiliates and joint
ventures evaluated with equity method. |

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STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS Estimated future cash inflows represent the revenues that would be received from production and are determined by applying year-end prices of oil and gas to the estimated future production of proved reserves. Future price changes are considered only to extent provided by contractual arrangements. Estimated future development and production costs are determined by estimating the expenditures to be incurred in developing and producing the proved reserves at the end of the year. Neither the effects of price and cost escalations nor expected future changes in technology and operating practices have been considered. The standardized measure is calculated as the excess of future cash inflows from proved reserves less future costs of producing and developing the reserves, future income taxes and a yearly 10% discount factor. Future cash flows as of 31 December 2003, 2004 and 2005 include annual revenue payments from Enis Gas & Power segment and other transport and distribution gas companies which represent payments for modulation services to support demand delivery capability. Such capability is provided through utilization of gas withdrawn from producing fields and injected into depleted gas fields as storage. Future production costs include the estimated expenditures related to the production of proved reserves plus any production taxes without consideration of future inflation. Future development costs include the estimated costs of drilling development wells and installation of production facilities, plus the net costs associated with dismantlement and abandonment of wells and facilities, under the assumption that year-end costs continue without considering future inflation. Future income taxes were calculated in accordance with the tax laws of the countries in which Eni operates. The standardized measure of discounted future net cash flows, related to the preceding proved oil and gas reserves, is calculated in accordance with the requirements of Statement of Financial Accounting Standard No. 69. The standardized measure does not purport to reflect realizable values or fair market value of Enis proved reserves. An estimate of fair value would also take into account, among other things, the expected recovery of reserves in excess of proved reserves, anticipated changes in future prices and costs and a discount factor representative of the risks inherent in producing oil and gas. .

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Contents

(million euro) Italy North Africa West Africa North Sea Rest of World Total

| At 31 December 2003 — Future
cash inflows | 24,641 | | 36,484 | | 25,074 | | 19,590 | | 28,505 | | 134,294 | |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Future production costs | (3,879 | ) | (7,868 | ) | (5,847 | ) | (5,458 | ) | (4,763 | ) | (27,815 | ) |
| Future
development and abandonment costs | (2,080 | ) | (3,762 | ) | (2,005 | ) | (1,084 | ) | (2,575 | ) | (11,506 | ) |
| Future net inflow before income tax | 18,682 | | 24,854 | | 17,222 | | 13,048 | | 21,167 | | 94,973 | |
| Future
income tax | (6,113 | ) | (10,296 | ) | (8,979 | ) | (7,614 | ) | (6,073 | ) | (39,075 | ) |
| Future net cash flows | 12,569 | | 14,558 | | 8,243 | | 5,434 | | 15,094 | | 55,898 | |
| 10%
discount factor | (5,056 | ) | (6,646 | ) | (3,130 | ) | (1,872 | ) | (7,930 | ) | (24,634 | ) |
| Standardized measure of discounted future net
cash flows | 7,513 | | 7,912 | | 5,113 | | 3,562 | | 7,164 | | 31,264 | |
| At 31
December 2004 | | | | | | | | | | | | |
| Future cash inflows | 28,582 | | 40,373 | | 28,395 | | 20,435 | | 32,619 | | 150,404 | |
| Future
production costs | (3,635 | ) | (7,237 | ) | (6,664 | ) | (5,082 | ) | (4,858 | ) | (27,476 | ) |
| Future development and abandonment costs | (2,210 | ) | (4,073 | ) | (1,873 | ) | (1,419 | ) | (2,873 | ) | (12,448 | ) |
| Future
net inflow before income tax | 22,737 | | 29,063 | | 19,858 | | 13,934 | | 24,888 | | 110,480 | |
| Future income tax | (7,599 | ) | (11,487 | ) | (10,949 | ) | (8,824 | ) | (6,736 | ) | (45,595 | ) |
| Future
net cash flows | 15,138 | | 17,576 | | 8,909 | | 5,110 | | 18,152 | | 64,885 | |
| 10% discount factor | (6,006 | ) | (7,592 | ) | (3,267 | ) | (1,350 | ) | (9,412 | ) | (27,627 | ) |
| Standardized
measure of discounted future net cash flows | 9,132 | | 9,984 | | 5,642 | | 3,760 | | 8,740 | | 37,258 | |
| At 31 December 2005 | | | | | | | | | | | | |
| Future
cash inflows | 36,203 | | 66,100 | | 45,952 | | 30,835 | | 50,590 | | 229,680 | |
| Future production costs | (4,609 | ) | (10,030 | ) | (9,604 | ) | (5,632 | ) | (6,399 | ) | (36,274 | ) |
| Future
development and abandonment costs | (2,936 | ) | (3,960 | ) | (2,594 | ) | (1,774 | ) | (4,059 | ) | (15,323 | ) |
| Future net inflow before income tax | 28,658 | | 52,110 | | 33,754 | | 23,429 | | 40,132 | | 178,083 | |
| Future
income tax | (9,890 | ) | (22,744 | ) | (21,056 | ) | (15,225 | ) | (12,097 | ) | (81,012 | ) |
| Future net cash flows | 18,768 | | 29,366 | | 12,698 | | 8,204 | | 28,035 | | 97,071 | |
| 10%
discount factor | (7,643 | ) | (12,095 | ) | (4,122 | ) | (2,155 | ) | (15,705 | ) | (41,720 | ) |
| Standardized measure of discounted future net
cash flows | 11,125 | | 17,271 | | 8,576 | | 6,049 | | 12,330 | | 55,351 | |
| Standardized
measure of discounted future net cash flows affiliates
and joint ventures (a) | | | 130 | | 127 | | | | 114 | | 371 | |
| Standardized measure of discounted future net
cash flows | 11,125 | | 17,401 | | 8,703 | | 6,049 | | 12,444 | | 55,722 | |

(a) Starting from 2005 are included data related to affiliates and joint ventures evaluated with equity method.

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CHANGES IN STANDARDIZED MEASURE OF DISCOUNTED FUTURE NET CASH FLOWS The following table reflects the changes in standardized measure of discounted future net cash flows for the years 2003, 2004 and 2005.

(million euro) 2003 2004 2005

| Beginning of year — Reclassification
2004 affiliates and joint ventures data | 34,480 | | 31,264 | | 37,258 — (357 | ) |
| --- | --- | --- | --- | --- | --- | --- |
| Beginning of year consolidated | 34,480 | | 31,264 | | 36,901 | |
| Increase
(Decrease): | | | | | | |
| - sales, net of production costs | (10,144 | ) | (12,172 | ) | (17,880 | ) |
| - net
changes in sales and transfer prices, net of production
costs | (1,050 | ) | 13,031 | | 33,372 | |
| - extensions, discoveries and improved recovery,
net of future production and development costs | 1,855 | | 2,806 | | 3,527 | |
| - changes
in estimated future development and abandonment costs | (3,576 | ) | (3,437 | ) | (3,654 | ) |
| - development costs incurred during the period
that reduced future development costs | 4,864 | | 4,229 | | 3,865 | |
| -
revisions of quantity estimates | 2,348 | | 1,658 | | 47 | |
| - accretion of discount | 5,585 | | 5,328 | | 6,573 | |
| - net
change in income taxes | 105 | | (4,805 | ) | (17,327 | ) |
| - purchase of reserves in-place | 1,488 | | | | 977 | |
| - sale of
reserves in-place | (222 | ) | (727 | ) | | |
| - changes in production rates (timing) and other | (4,469 | ) | 83 | | 8,950 | |
| Net
increase (decrease) | (3,216 | ) | 5,994 | | 18,450 | |
| End of year consolidates | 31,264 | | 37,258 | | 55,351 | |
| End of
year affiliates and joint ventures (a) | | | | | 371 | |
| End of year | 31,264 | | 37,258 | | 55,722 | |

(a) Starting from 2005 are included data related to affiliates and joint ventures evaluated with equity method.

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| ● |
| --- |
| Società per Azioni Headquarters: Rome, Piazzale Enrico Mattei, 1 Capital Stock: euro 4,005,358,876 fully paid Tax identification number 00484960588 Branches: San Donato Milanese (MI) - Via Emilia, 1 San Donato Milanese (MI) - Piazza Ezio Vanoni, 1 |
| I nvestor Relations Piazza Ezio Vanoni, 1 - 20097 San Donato Milanese (Milan) Tel. +39-0252051651 - Fax +39-0252031929 e-mail: [email protected] Publications Financial Statements prepared in accordance with
Legislative Decree No. 127 of April 9, 1991 (in Italian) Annual Report Annual Report on Form 20-F for the Securities and Exchange Commission Health, Safety and Environment Report (in Italian and
English) Fact Book (in Italian and English) Report on the First, the Second and the Third Quarter (in Italian and English) Report on the First Half (in Italian) prepared in accordance with art. 2428 of Italian Civil
Code Report on the First Half (in English) Internet Home page: www.eni.it Rome office telephone: +39-0659821 Toll-free number: 800940924 e-mail: [email protected] ADRs/Depositar y Morgan Guaranty Trust Company of New York ADR Department 60 Wall Street (36th Floor) New York, New York 10260 Tel. 212-648-3164 ADRs/Transfer agent Morgan ADR Service Center 2 Heritage Drive North Quincy, MA 02171 Tel. 617-575-4328 Design: Opera Cover: Grafica Internazionale - Rome -
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