Schlumberger Announces Second Quarter 2004 Results Conference Call

To access the conference call, attendees should contact the conference call operator at + 1-888-428-4479 within North America or + 1-651-291-0561 outside of North America approximately 10 minutes prior to the call's start time, and ask for the "Schlumberger Earnings Conference Call."

A replay of the conference call will be available until August 6, 2004, 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 737861.

A live webcast of the conference call will be simultaneously broadcast at www.slb.com/irwebcast on a listen-only basis. Attendees should log-in 15 minutes ahead of time to test their browsers and register for the webcast. Following the event, a replay will be available at the same URL until August 6, 2004.

Note

Updated financial schedules taking into account the activities discontinued since the beginning of the year are available at www.slb.com/ir.

About Schlumberger

Schlumberger is the world's leading oilfield services company supplying technology, project management and information solutions that optimize performance for customers working in the oil and gas industry. The company employs more than 45,000 people of over 140 nationalities working in 100 countries, and comprises two primary business segments. Schlumberger Oilfield Services supplies a wide range of products and services from formation evaluation through directional drilling, well cementing and stimulation, well completions and productivity to consulting, software, information management and IT infrastructure services that support core industry operational processes. WesternGeco, jointly owned with Baker Hughes, is the world's largest seismic company and provides advanced acquisition and data processing services. In 2003, Schlumberger operating revenue was $10.1 billion. For more information, visit slb.com.