TGS : TGS Commences 3D Multi-client Seismic Survey Offshore Liberia

     TGS : TGS Commences 3D Multi-client Seismic Survey Offshore Liberia

ASKER, NORWAY (16 January 2013) - TGS has commenced acquisition of a 3D
multi-client survey, Sunfish, which covers up to 7,800 km^2 of highly
prospective acreage in the Harper Basin, offshore Liberia. 

"This survey provides excellent data coverage for the source prone, syn-rift
and early post-rift sequences, in this highly prospective area offshore
Liberia. TGS has been active in acquiring data over the West Africa Transform
margin for the past decade and this survey demonstrates TGS' ongoing
commitment to grow the seismic data library in Africa," commented Stein Ove
Isaksen, Senior VP Eastern Hemisphere for TGS.

TGS is chartering the 12 streamer Polarcus Asima for this survey. The charter
will last for approximatelysixmonths.Data processing will be performed by
TGS and will be available to clients in Q4 2013, prior to the Liberia 2013 Bid
Round.

The survey is supported by industry funding.

Company summary

TGS-NOPECGeophysical 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, permanent reservoir monitoring
and data integration solutions.



For more information visitTGS 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 principal 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).

For additional information about this press release please contact:

Kristian Johansen
Chief Financial Officer
Tel: +47 47 60 33 34
Email: kristian.johansen@tgs.com

Will Ashby
Director Investor Relations and M&A

Tel: +1 713 860 2184
Email: will.ashby@tgs.com

Stein Ove Isaksen
Senior VP Eastern Hemisphere
Tel: +47 66 76 99 00
Email: SteinOve.Isaksen@tgs.com



This information is subject of the disclosure requirements acc. to §5-12 vphl
(Norwegian Securities Trading Act)

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Source: TGS via Thomson Reuters ONE
HUG#1670346
 
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