HYDRO SELECTS WESTERNGECO FOR NORTH SEA Q-MARINE SURVEY

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HYDRO SELECTS WESTERNGECO FOR NORTH SEA Q-MARINE SURVEY
29 April 2004 - Schlumberger

WesternGeco announced today that Hydro has awarded the company a contract to conduct acquisition and processing of two 3D surveys over the Oseberg field, offshore Norway. Using the Q-Marine single-sensor marine seismic system, the 4D project, scheduled to begin this month, repeats heritage surveys over areas of approximately 906 and 191 square kilometers.

Using the Q-Marine single-sensor marine seismic system, the 4D project, scheduled to begin this month, repeats heritage surveys over areas of approximately 906 and 191 square kilometers.

'We chose WesternGeco Q-Technology for this important monitor survey because of the advantages of active steering to best match the source and receiver positions of the heritage surveys, and to improve safety and enhance cost efficiency while working adjacent to our platforms,' said Jens-Petter Kvarstein, geophysical operations manager, Hydro. 'We also expect the high-resolution Q survey to provide improved knowledge of the field for asset management and reduced development risk.'

The Q-Technology vessel, Geco Topaz, towing six 3600-meter cables with spreads of 750 meters and 500 meters, and utilizing the WesternGeco proprietary calibrated Q-Marine source, will conduct the surveys.

'The high repeatability of Q-Marine surveys, coupled with its superior resolution, makes Q the only true 4D Ready technology for reservoir monitoring,' said Roar Bekker, manager, WesternGeco Europe. 'Also, the Q-Marine active steering will reduce the necessity of infill and provide better coverage around the three platforms in the survey areas.'

Q is the WesternGeco proprietary suite of advanced seismic technologies for enhanced reservoir location, description and management.

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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 52,000 people of over 140 nationalities working in more than 80 countries, and comprises two business segments.

Schlumberger 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.

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