TGS-NOPEC

TGS-NOPEC (OSL:TGS) The 1,030,000 stock options granted to 53 key employees on August 14th 2008 have now been accepted by the optionees. The stock options are secured by treasury shares and have an exercise price of NOK 70,80 per share.

TGS-NOPEC (OSL:TGS) Asker, 3. September, 2008. TGS refers to our release and Minutes posted yesterday. Although the conclusion of the votes cast yesterday was correct, unfortunately, the number of votes voting for and against of Resolution #4 were quoted wrongly. The number of shares voting for the Board of Directors' proposal to drop the demand for implementation of the merger with Wavefield-Inseis in arbitration and instead concentrate on the demand for compensation from Wavefield Inseis were 31,464,711, or 92% of the shares voting, and 2,874,936 shares voted against (8%) and 4.400 shares refrained from voting for the Board of Directors' proposal.

TGS-NOPEC (OSL:TGS) TGS Nopec Geophysical Company ASA today held an Extraordinary General Meeting to vote on the Board of Directors' proposal to drop the demand for implementation of the merger with Wavefield-Inseis in arbitration and instead concentrate on the demand for compensation from Wavefield Inseis. The result of the voting was that 25.782.261 shares voted for the Board of Directors' proposal, 8.557.486 shares voted against and 4.400 shares refrained from voting for the Board of Directors' proposal. The minutes from the Extraordinary General Meeting will be sent as soon as it is finished.

TGS-NOPEC (OSL:TGS) Asker, 29. August, 2008. We refer to Wavefield's release posted yesterday on this matter. The arbitration hearing was originally scheduled to start 9 September 2008. By joint agreement between both parties a postponement of the start of the hearing was set to 16 September 2008 due to negotiations between the parties for an amicable completion of the merger. TGS remains prepared to start the hearing by 16 September as agreed.

TGS-NOPEC (OSL:TGS) The shareholder who put forward the request for the resolution in Item 4.2 has requested this resolution to be withdrawn from the agenda for the Extraordinary General Meeting.

TGS-NOPEC (OSL:TGS) Please see attached the script from the conference call held today by Hank Hamilton at 13.00 for analysts and investors, together with a copy of the letter sendt from TGS to Wavefield on August 4th 2008.

TGS-NOPEC (OSL:TGS) Reference is made to the calls for EGM issued this morning in English and Norwegian. During the publication process by Hugin, an important sentence in the English version of the call fell out.

TGS-NOPEC (OSL:TGS) Reference is made to the calls for EGM issued this morning in English and Norwegian. During the publication process by Hugin, an important sentence in the English version of the call fell out.

TGS-NOPEC (OSL:TGS) * Paragraph was missing from this morning's release

TGS-NOPEC (OSL:TGS) The extraordinary General Meeting of TGS-NOPEC Geophysical Company ASA will be held on September 2, 2008 at Shippingklubben, Haakon VII's gate 1, Oslo, at 15.00 hrs.