Schlumberger Limited. : WesternGeco Expands Marine Broadband Offering with ObliQ Technology

GATWICK, April 23, 2012-WesternGeco announced today the introduction of the ObliQ* sliding-notch broadband acquisition and imaging technique, which enhances low-frequency content of marine seismic data without compromising high frequencies.

The ObliQ technique increases the penetration depth of seismic imaging and helps geoscientists extract rock properties from seismic data. Optimized seismic bandwidth is achieved by combining variable streamer depth acquisition with a proprietary deghosting methodology and a newly developed broadband seismic source. This proprietary processing approach is applied early in the sequence, making the data suitable for both time- and depth-domain analysis.

"As the search for hydrocarbons moves to evermore challenging environments, the use of such advanced imaging technologies is becoming increasingly important for successful exploration programs," said Pennelope Ratcliffe, vice president, Marine, WesternGeco. "The ObliQ technique provides broadband data for exploration purposes and complements the well-established WesternGeco DISCover* broadband technology, which provides high-fidelity, full-offset broadband data using a proprietary dual-level tow."

Enabled by the Q-Marine* point receiver marine seismic system, the ObliQ technique can also be used with other WesternGeco technologies such as Coil Shooting* and Dual-Coil Shooting* full-azimuth acquisition to combine broad bandwidth with full-azimuth, long-offset acquisition. This combination is particularly important for imaging below complex structures such as subsalt and sub basalt.

For more information, visit www.slb.com/obliq.

Schlumberger is the world's leading supplier of technology, integrated project management and information solutions to customers working in the oil and gas industry worldwide. Employing more than 113,000 people representing over 140 nationalities and working in approximately 85 countries, Schlumberger provides the industry's widest range of products and services from exploration through production.

Schlumberger Limited has principal offices in Paris, Houston and The Hague, and reported revenues of $39.54 billion in 2011.www.slb.com.

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