Schlumberger 2012 Annual Report - page 93

Exhibit 24
Powers 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, 2012, 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/ Peter L.S. Currie
Peter L.S. Currie
/s/ Michael E. Marks
Michael E. Marks
/s/ Tony Isaac
Tony Isaac
Chairman of the Board
/s/ Elizabeth A. Moler
Elizabeth A. Moler
/s/ K.Vaman Kamath
K.Vaman Kamath
/s/ Lubna S. Olayan
Lubna S. Olayan
/s/ Paal Kibsgaard
Paal Kibsgaard
Director and Chief Executive Officer
/s/ Leo Rafael Reif
Leo Rafael Reif
/s/ Nikolay Kudryavtsev
Nikolay Kudryavtsev
/s/ Tore Sandvold
Tore Sandvold
/s/ Adrian Lajous
Adrian Lajous
/s/ Henri Seydoux
Henri Seydoux
Date: January 17, 2013
1...,83,84,85,86,87,88,89,90,91,92 94,95,96,97,98,99,100
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