TGS Announces New Multi-Client 2D Survey in Labrador Sea

HOUSTON, TX--(Marketwire - Sep 12, 2011) - TGS has commenced a new 22,000 km multi-client 2D survey offshore Newfoundland in the Labrador Sea in partnership with PGS.

The new seismic data is being acquired by the M/V Sanco Spirit and utilizes the PGS GeoStreamer® technology. Data acquisition will continue through Q3 2011 and the vessel will return in 2012 to complete the survey. The survey area is north of oil discoveries including Hibernia, Hebron, Terra Nova and White Rose. The seismic survey covers some areas currently nominated in the Newfoundland and Labrador Offshore Petroleum Board's call for bids (NL-11-03).

"It is important for TGS to return to Eastern Canada after a decade and add data coverage in an area where there is little modern seismic data available to the market. Eastern Canada remains one of the most promising deepwater exploration arenas in the world and we are excited to be a part of it," commented Stein Ove Isaksen, Senior VP North & South America for TGS.

Initial data will be available to clients during Q4 2011. The survey is supported by industry funding.

Company summary
TGS-NOPEC Geophysical Company (TGS) provides multi-client geoscience data and services to oil and gas Exploration and Production companies around the globe. TGS' geophysical and geological data products include multi-client seismic libraries, permanent reservoir monitoring, magnetic and gravity data, the industry's largest global database of digital well logs and regional interpretive products. TGS also provides high-end depth imaging services to help resolve complex seismic imaging problems. For more information visit TGS online at www.tgsnopec.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).