Press Releases

TGS signs cooperation agreement with DMNG in Arctic region

ASKER, NORWAY (4 January 2011) - TGS has signed a three year sales, marketing and 2D seismic Cooperation Agreement with Dalmornefte Geophysica Yuzhno- Sakhalinsk (DMNG) in the Arctic region, east and west of the Bering Strait.  The Cooperation Agreement includes industry funded 2D operations performed in Russian waters during Q3 2010, which will serve as a foundation for additional work in 2011 and 2012.

"It is important for TGS to return to the Arctic region and add data coverage in an area that is believed to hold huge hydrocarbon volumes.  We have had a long and positive relationship with DMNG and are delighted to extend our relationship into additional high-quality projects in the Russian arctic," commented Kjell E. Trommestad, VP and General Director Europe for TGS.

About TGS

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.

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 product 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.

Sven Børre Larsen

Sven Børre Larsen

Chief Financial Officer

Tel: +47 90 94 36 73

Ellen Munkvold

Ellen Munkvold

IR Coordinator

Tel: +47 97 76 26 25