WesternGeco Unveils Enhanced Imaging Technique
by Schlumberger Ltd.
|Monday, April 23, 2012
WesternGeco announced 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.
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