TGS-NOPEC

TGS-NOPEC (OSL:TGS) (Asker, Norway, August 19, 2008) The Board of Directors and the Executive Management of TGS-NOPEC Geophysical Company ASA recommend to the company's shareholders to terminate the merger process with Wavefield Inseis and to seek compensation limited upwards to USD 700 million.

TGS-NOPEC (OSL:TGS) We refer to our release to the Oslo Stock Exchange of 11 August related to the talks on a revised merger plan with Wavefield, where we informed that TGS would call an extraordinary general meeting of shareholders by end of last week.

TGS-NOPEC (OSL:TGS) We refer to the press release distributed earlier today, and want to inform that the discussions between the parties was related to several issues, where an exchange ratio of 0,5325 shares in TGS for each share in Wavefield was one of the items. For more information, please contact:

TGS-NOPEC (OSL:TGS) Asker 11. August 2008.

TGS-NOPEC (Other OTC: TGSNF.PK) Please find attached the TGS Q2 -2008 Presentation slides.

TGS-NOPEC (Other OTC: TGSNF.PK) 2nd QUARTER HIGHLIGHTS

TGS-NOPEC (Other OTC: TGSNF.PK) TGS-NOPEC Geophysical Company ASA will present the financial results for the 2nd quarter of 2008 on Thursday 7th August, 2008 at 08.30 hrs CET at Hotel Continental, Oslo.

TGS-NOPEC (Other OTC: TGSNF.PK) Asker, June 17th, 2008. TGS refers to its June 4th and 6th releases as well as the presentation slides (especially slides #25 and #26) regarding the merger with Wavefield-Inseis posted from the June 5th annual general meeting of TGS shareholders.

TGS-NOPEC (Other OTC: TGSNF.PK) The 245,000 new shares following the stock option exercises as notified Oslo Stock Exchange on May 22nd 2008 were registered in the Company Register in Brønnøysund, June 6th 2008. The Share Capital of TGS-NOPEC is thereafter 106,439,800 shares at a nominal value of NOK 0.25 per share. Certificate of Registration has been sent to the Oslo Stock Exchange.

TGS-NOPEC (Other OTC: TGSNF.PK) Asker, June 6th, 2008. The TGS annual general meeting of shareholders was held on June 5th, 2008. See minutes attached. The meeting included a thorough presentation and discussion of the merger and dispute process with Wavefield-Inseis ASA.