PGS Closes Pertra Sale With Talisman OSLO, Norway, March 1 /PRNewswire-FirstCall/ -- Petroleum Geo-Services ASA ("PGS" or the "Company") (OSE:andOSE:NYSE:OSE:PGS) announced today that it has closed the previously announced sale of its wholly-owned oil subsidiary, Pertra AS, to Talisman Energy (UK) Limited, a wholly owned subsidiary of Talisman Energy Inc. The transaction was closed under the same terms and conditions previously described in the press release of February 1, 2005 and the quarterly report dated February 25, 2005. Petroleum Geo-Services is a technologically focused oilfield service company principally involved in geophysical and floating production services. PGS provides a broad range of seismic and reservoir services, including acquisition, processing, interpretation, and field evaluation. PGS owns and operates four floating production, storage and offloading units (FPSOs). PGS operates on a worldwide basis with headquarters at Lysaker, Norway. For more information on Petroleum Geo-Services visit http://www.pgs.com/ . The information included herein contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements are based on various assumptions made by the Company which are beyond its control and are subject to certain additional risks and uncertainties as disclosed by the Company in its filings with the Securities and Exchange Commission including the Company's most recent Annual Report on Form 20-F for the year ended December 31, 2003. As a result of these factors, actual events may differ materially from those indicated in or implied by such forward-looking statements. FOR DETAILS, CONTACT: Ola Bosterud Sam R. Morrow Phone: +47 6752 6400 US Investor Services, Renee Sixkiller, Phone: +1 281 679 2240 DATASOURCE: Petroleum Geo-Services ASA CONTACT: Ola Bosterud, or Sam R. Morrow, +47-6752-6400, or US Investor Services: Renee Sixkiller, +1-281-679-2240, all for Petroleum Geo-Services ASA Web site: http://www.pgs.com/

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