Compagnie Generale de Geophysique : CGG Signs Exclusive Rights for Multi-Client Program Offshore Libya PARIS, April 14 /PRNewswire-FirstCall/ -- Compagnie Generale de Geophysique (ISIN: FR0000120164; NYSE:GGY) announced today that it has been awarded, in co-operation with NAGECO (North African Geophysical Co.), the exclusive rights by NOC (National Oil Company) to perform a speculative multi-client program over the entire Libyan Offshore. The contract was signed between the parties in Tripoli on 7th April 2004. CGG expects to commence operations within the second quarter of 2004 with a regional 2D seismic, gravimetric and magnetic data acquisition program of 38,000 line kilometers over all licensed and open acreage. It is envisaged that this first phase of operations will take around 12 months. The data will be processed in a CGG's processing center. Very little data has been acquired in the Libyan offshore in the last twenty years and much of the existing data is of a significantly older vintage. This new dataset is the first regional program in the Libyan Offshore and is the first modern dataset to extend information on the existing shelf areas and to explore the potential for prospectivity in deeper water basins. Subject to the success of this dataset, CGG will investigate the potential for extensive 3D non-exclusive coverage. 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. The Compagnie Generale de Geophysique group is a global participant in the oilfield services industry, providing a wide range of seismic data acquisition, processing and geoscience services and software to clients in the oil and gas exploration and production business. It is also a global manufacturer of geophysical equipment. http://www.cgg.com/ DATASOURCE: Compagnie Generale de Geophysique (CGG) CONTACT: For further information, please contact: Christophe BARNINI: +33-1-64-47-38-10 () Rollin DELZER: +33-1-64-47-33-12 ()

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