Schlumberger Announces Fourth-Quarter and Full Year 2009 Results Conference Call

HOUSTON, October 27, 2009 – Schlumberger Limited (NYSE:SLB) announced today that it will hold a conference call on January 22, 2010 to discuss the results for the fourth quarter and full year ended December 31, 2009.

The conference call is scheduled to begin at 8:00 a.m. US Central Time (CT), 9:00 a.m. Eastern Time (ET). The results are expected to be released at approximately 5:00 a.m. CT, 6:00 a.m. ET that same day.

To access the conference call, listeners should contact the Conference Call Operator at +1-800-230-1059 within North America or +1-612-234-9959 outside of North America approximately 10 minutes prior to the start of the call, and ask for the “Schlumberger Earnings Conference Call.”

A webcast of the conference call will be broadcast simultaneously at www.SLB.com/irwebcast on a listen-only basis. Listeners should log in 15 minutes prior to the start of the call to test their browsers and register for the webcast.

Following the end of the conference call, a replay will be available at www.SLB.com/irwebcast until February 22, 2010, and can be accessed by dialing +1-800-475-6701 within North America or +1-320-365-3844 outside of North America, and giving the access code 120779.

About Schlumberger

Schlumberger is the world’s leading supplier of technology, integrated project management and information solutions to customers working in the oil and gas industry worldwide. Employing approximately 77,000 people representing over 140 nationalities and working in more than 80 countries, Schlumberger provides the industry’s widest range of products and services from exploration through production.

Schlumberger Limited has principal offices in Paris, Houston and The Hague and reported revenues of $27.16 billion in 2008. For more information, visit www.SLB.com.

For further information, contact:

Malcolm Theobald
Vice President of Investor Relations

or

Robert Bergeron
Manager of Investor Relations
Tel: +1 713 375 3535
investor-relations@slb.com