Schlumberger Announces Third-Quarter 2007 Results Conference Call

Schlumberger Limited (NYSE:SLB) will hold a conference call on
October 19, 2007 at 8:00 a.m. Central Time, 9:00 a.m. Eastern Time to
discuss the results for the third quarter ending on September 30,
2007. The results are expected to be released at 5:00 a.m. Central,
6:00 a.m. Eastern that same morning.

To access the conference call, attendees should dial the
Conference Call Operator at + 1-800-230-1059 within North America or
+1-612-288-0329 outside of North America approximately 10 minutes
prior to the call's start time. Ask the Operator for the "Schlumberger
Earnings Conference Call."

A replay of the conference call will be available until November
18, 2007, 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 886387.

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 76,000
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 2006, Schlumberger operating revenue was
USD 19.23 billion. For more information, visit www.SLB.com.