SLB Schlumberger Ltd

Schlumberger Limited (NYSE:SLB) will hold a conference call on April 18, 2008 at 8:00am Central, 9:00am Eastern to discuss the results for the first quarter ending on March 31, 2008. The results are expected to be released at 5:00am Central, 6:00am Eastern that same morning. To access the conference call, attendees should contact the Conference Call Operator at +1-800-288-8976 within North America or +1-612-332-0530 outside of North America approximately 10 minutes prior to the call's start time, and ask for the "Schlumberger Earnings Conference Call." Following the conclusion of the conference call, an audio replay will be available until May 18, 2008, 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 915451. A live webcast of the conference call will be broadcast simultaneously at www.SLB.com/irwebcast on a listen-only basis. Attendees should log in 15 minutes prior to the start of the call to test their browsers and register for the webcast. Following the event, a replay will be available at the same URL. About Schlumberger Schlumberger is the world's leading oilfield services company supplying technology, information solutions and integrated project management that optimize reservoir performance for customers working in the oil and gas industry. The company employs more than 80,000 people of over 140 nationalities working in approximately 80 countries. Schlumberger supplies a wide range of products and services from seismic acquisition and processing; formation evaluation; well testing and directional drilling to well cementing and stimulation; artificial lift and well completions; and consulting, software, and information management. In 2007, Schlumberger revenue was $23.28 billion. For more information, visit www.SLB.com.