TGS, Schlumberger launch full-azimuth surveys in deepwater Gulf of Mexico

Offshore staff

ASKER, Norway TGS and Schlumberger have started the full-azimuth multi-client Revolution XII and XIII surveys in the US Gulf of Mexico.

The surveys will cover approximately 7,150 sq km (2,761 sq mi) in the Green Canyon, Atwater Valley, and Ewing Bank protraction areas of the central Gulf of Mexico.

They will be acquired using the Schlumberger WesternGeco Q-Marine point-receiver marine seismic system combined with the proprietary multi-vessel, Dual Coil Shooting acquisition technique, which will provide broadband, long-offset, full-azimuth data. This combination of technology and technique, the companies claim, will improve illumination and imaging of the subsalt and other complex geologic features. 

Acquisition is expected to end in late 1Q 2017 with final processed data available in early 2018.

TGS CEO Kristian Johansen said: “TGS is excited to return to the US Gulf of Mexico to continue its successful collaboration with WesternGeco. Together we have a strong track record of success in developing and delivering projects in this prolific part of the central Gulf of Mexico. Our cooperation started in 2008 with acquisition of the Freedom WAZ survey and was followed later by the Liberty WAZ and Patriot M-WAZ surveys.

“The Revolution XII and XIII surveys benefit from the latest advances in seismic technology and will provide the E&P industry with critical information to support exploration and drilling activity in a region that is expected to remain a priority for our customers.”

These new Revolution Dual Coil Shooting full-azimuth surveys will record offsets of more than 14 km (9 mi) for imaging below the salt in the deepwater Gulf of Mexico.

Also, autonomous marine vehicles (AMV) are being deployed. These AMVs will simultaneously acquire ultra-long offsets of more than 20 km (12 mi), which benefit full waveform inversion in the accurate velocity model building over such complex subsalt areas.

Maurice Nessim, president of WesternGeco, added: “With these new techniques, we expect to see further improvements in subsalt imaging and amplitude fidelity for reservoir characterization providing value for our customers.”

This project is supported by industry funding.


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