TGS ASA — Earnings Release 2018

Apr 10, 2018

TGS Q1 2018 Revenue Update

TGS Q1 2018 Revenue Update

ASKER, NORWAY (10 April 2018) - Based on preliminary reporting from operating

units, TGS management expects net revenues for the first quarter of 2018 to be

approximately USD 135 million, 56% higher than Q1 2017.

"We are very pleased with our Q1 revenue performance, particularly given that

over 85% comes from late sales attributed to the existing data library.  With

all regions performing above our expectations, we see this as another sign of an

underlying improvement in the market," commented Kristian Johansen, CEO, TGS.

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

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Email: will.ashby@tgs.com

This information is subject of the disclosure requirements pursuant to section

5-12 of the Norwegian Securities Trading Act.