TGS ASA — Earnings Release 2017

Jan 31, 2018

TGS Q4 2017 Financial Results and 2018 Guidance

TGS Q4 2017 Financial Results and 2018 Guidance

ASKER, NORWAY (31 February 2018) - TGS will release its Q4 2017 financial

results along with 2018 guidance at approximately 07:00 CET on 8 February 2018.

CEO Kristian Johansen and CFO Sven Børre Larsen will present the results at

09:00 CET at the Felix Konferansesenter, Bryggetorget 3, Oslo, Norway.  The

presentation is open to the public and can be followed live at www.tgs.com or

directly from the webcast.

The slides from the presentation will also be available in PDF format at both

the TGS and Oslo Stock Exchange websites.

CEO Kristian Johansen and CFO Sven Børre Larsen will host a conference call on

8 February 2018 at 15:00 CET (09:00 ET).  Attendees may want to call 5-10

minutes before to ensure registration and access.

* Norwegian attendees are invited to call 800 57933 or +47 2100 2610

* International attendees are invited to call 0800 358 6377 or +44 (0)330

336 9105

* US attendees are invited to call 888-394-8218 or +1 323-794-2149

Participants will need to quote the following confirmation code when dialing

into the conference: 6755927.

A Q&A session will follow a short introduction, based upon the presentation

issued in the morning.  To pose a question, please press *1.

A replay of the conference call will be available shortly after.  To access

replay of the TGS conference call, dial:

* +47 23 50 00 77 or + 800 196 72 (Norway)

* +44 (0) 207 660 0134 or + 0 808 101 1153 (International)

* +1 719-457-0820 or + 888-203-1112 (US)

Replay access code 6755927 followed by # (pound-sign)

A replay of the conference call will also be available at www.tgs.com.

Company summary

TGS-NOPEC Geophysical Company (TGS) provides multi-client geoscience data to oil

and gas Exploration and Production companies worldwide.  In addition to

extensive global geophysical and geological data libraries that include multi-

client seismic data, magnetic and gravity data, digital well logs, production

data and directional surveys, TGS also offers advanced processing and imaging

services, interpretation products, and data integration solutions.

For more information visit TGS online at www.tgs.com.

Forward-looking statements and contact information

All statements in this press release other than statements of historical fact

are forward-looking statements, which are subject to a number of risks,

uncertainties and assumptions that are difficult to predict, and are based upon

assumptions as to future events that may not prove accurate. These factors

include TGS' reliance on a cyclical industry and principle customers, TGS'

ability to continue to expand markets for licensing of data, and TGS' ability to

acquire and process data products at costs commensurate with profitability.

Actual results may differ materially from those expected or projected in the

forward-looking statements. TGS undertakes no responsibility or obligation to

update or alter forward-looking statements for any reason.

TGS-NOPEC Geophysical Company ASA is listed on the Oslo Stock Exchange

(OSLO:TGS).

TGS sponsored American Depositary Shares trade on the U.S. over-the-counter

market under the symbol "TGSGY".

For additional information about this press release please contact:

Sven Børre Larsen

Chief Financial Officer

Tel: +47 90 94 36 73

Email: sven.larsen@tgs.com

Will Ashby

VP HR & Communication

Tel: +1 713 860 2184

Email: will.ashby@tgs.com

This information is subject to the disclosure requirements pursuant to section

5-12 of the Norwegian Securities Trading Act.