PARIS, September 2 /PRNewswire-FirstCall/ -- Compagnie Generale de Geophysique ("CGG" 0000120164 - GEPH.PA - NYSE : GGY) has acquired 1,766,953 shares in Exploration Resources ASA ("Exploration Resources"), at a purchase price of NOK 340 per share. As announced on 29 August 2005, CGG has previously acquired approximately 60 percent of the shares in the company, also at a price of NOK 340 per share. Following the purchase of today, CCG holds in aggregate 5,833,603 shares in Exploration Resources, corresponding to approximately 88.35 percent of the issued shares. Adjusted for treasury shares CGG holds approximately 90.02 percent of the votes in Exploration Resources. Exploration Resources is listed on Oslo B0rs under the ticker code "EXRE". CGG is a leading supplier of geophysical products and services to the worldwide oil and gas industry. Its shares are listed on the Eurolist of Euronext Paris SA and the New York Stock Exchange (under the form of American Depositary Shares). About Exploration Resources : Exploration Resources is a Norwegian based provider of marine seismic services to the global oil and gas industry with focus on towed seismic data acquisition, multi-clients seismic services, and 4c/4D/seabed operations. About CGG : CGG is a global participant in the oilfield services industry, providing a wide range of seismic data acquisition, processing and reservoir services to clients in the oil and gas exploration and production business. It is also a global manufacturer of geophysical equipment through its subsidiary Sercel. Email: Internet: http://www.cgg.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 forward-looking statements reflect numerous assumptions and involve a number of risks and uncertainties as disclosed by the Company from time to time in its filings with the Securities and Exchange Commission. Actual results may vary materially. DATASOURCE: Compagnie Generale de Geophysique (CGG) CONTACT: Contact : Christophe BARNINI +(33)-1-64-47-38-11

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