CGG Report Preliminary Results for 2004



Compagnie Generale de Geophysique (ISIN: FR0000120164; NYSE: GGY) reports unaudited 2004 total revenues estimated at euros 693 million (US$ 862 million), up 13% in euros and up 25% in US$ compared to 2003 (euros 612 million or US$ 689 million).

Total revenues for the 4th quarter 2004 were euros 204 million (US$ 264 million), up 30% in euros and up 42% in US$ compared to the 4th quarter 2003 (euros 158 million or US$ 186 million).

The backlog as of February 1st 2005 stands at US$ 455 million compared to US$ 435 million at November 1st 2004 and US$ 278 million at February 1, 2004.

CGG's 2004 audited financial results will be released on March 9, 2005.
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