CGG to Dispose of its Minority Interest in Eastern Echo

Paris, November 23, 2007

CGGVeritas (ISIN: FR0000120164 - NYSE: CGV) announced today that it has decided to tender its 30.9 million shares of Eastern Echo Holding PLC (ECHO NO) representing 12.67 percent of Eastern Echo’s issued share capital, to the new cash offer of Schlumberger, set at a price of NOK 15 per share.

About CGGVeritas:

CGGVeritas (www.cggveritas.com) is a leading international pure-play geophysical company delivering a wide range of technologies, services and equipment through Sercel, to its broad base of customers mainly throughout the global oil and gas industry.

CGGVeritas is listed on the Eurolist of Euronext Paris SA (ISIN: FR0000120164) and the New York Stock Exchange (in the form of American Depositary Shares, NYSE: CGV).

For more information about Eastern Echo Holding plc: www.easternecho.org

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