Schlumberger 2010 Annual Report - page 103

Exhibit 24
Power of Attorney
Each of the undersigned, in the capacity or capacities set forth below his or her signature as a member of the Board of
Directors and/or an officer of Schlumberger Limited, a Curaçao corporation (“the Corporation”), hereby appoints Simon
Ayat, Howard Guild and Alexander C. Juden, or either of them, the attorney or attorneys of the undersigned, with full
power of substitution and revocation, for and in the name, place and stead of the undersigned to execute and file with
the Securities and Exchange Commission the Annual Report on Form 10-K under the Securities Exchange Act of 1934
(the “Exchange Act”) for the fiscal year ending December 31, 2010, and any amendment or amendments to any such
Annual Report on Form 10-K, and any agreements, consents or waivers relative thereto, and to take any and all such
other action for and in the name and place and stead of the undersigned as may be necessary or desirable in order to
comply with the Exchange Act or the rules and regulations thereunder.
/s/ Philippe Camus
Philippe Camus
/s/ Michael E. Marks
Michael E. Marks
/s/ Peter L.S. Currie
Peter L.S. Currie
/s/ Elizabeth Moler
Elizabeth Moler
/s/ Andrew Gould
Andrew Gould
Chairman and Chief Executive Officer
/s/ Leo Rafael Reif
Leo Rafael Reif
/s/ Tony Isaac
Tony Isaac
/s/ Tore Sandvold
Tore Sandvold
/s/ K.V. Kamath
K.V. Kamath
/s/ Henri Seydoux
Henri Seydoux
/s/ Nikolay Kudryavtsev
Nikolay Kudryavtsev
/s/ Adrian Lajous
Adrian Lajous
Date: January 20, 2011
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