Schlumberger Announces First-Quarter Results Conference Call15:00 EST Tuesday, February 28, 2012 PARIS (Business Wire) -- Schlumberger Limited (NYSE:SLB) will hold a conference call on April 20, 2012 to discuss the results for the first quarter ending March 31, 2012. The conference call is scheduled to begin at 3:00 pm (Paris time) – 9:00 am (US Eastern Time). A press release regarding the results will be released prior to the call on that same day. To access the conference call, listeners should contact the Conference Call Operator at + 1-800-230-1085 within North America or +1-612-288-0337 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 May 20, 2012, 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 239412. 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 more than 113,000 people representing over 140 nationalities and working in approximately 85 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 $39.54 billion in 2011. For more information, visit www.slb.com. Schlumberger LimitedMalcolm Theobald, +1-713-375-3535Vice President of Investor RelationsJoy V. Domingo, +1-713-375-3535Manager of Investor Relationsinvestor-relations@slb.com