CGG and Magseis Fairfield wrap up Cornerstone OBN survey

CGG and Magseis Fairfield have completed the 2020 acquisition of the largest OBN survey ever acquired in the North Sea.

The OBN Cornerstone 2020 multi-client survey in the UK Central North Sea commenced in March 2020.

The survey saw approximately 1,650 square kilometres of long-offset, full-azimuth data acquired.

The first images should be available in early 2021 and final PSDM data planned for release in Q4 2021.

We could also see further extensions of the OBN Cornerstone survey in 2021, CGG noted.

Covering two areas of the UK Continental Shelf, the OBN Cornerstone 2020 survey project represented a total of 813,000 man-hours with zero Lost Time Incidents (LTIs).

Survey deliverables will benefit from CGG’s OBN processing and imaging technologies, providing a step-change in seismic imaging quality and reservoir characterization detail and bringing new insight to aid continued development of plays and existing fields in the Central North Sea region.

This survey specifically addresses the challenges associated with deeper, higher-risk Jurassic and Triassic plays, typically under high-pressure, high-temperature conditions, and the presence of complex structural processes associated with Permian salt movement. The combination of full-azimuth imaging, additional fold and near-offset data will result in significant improvement of deep illumination and noise removal, while helping to illuminate and image the steep flanks and complex architecture created by salt diapirism.

“We are pleased to announce completion of the acquisition of our OBN Cornerstone 2020 survey and would like to congratulate both the CGG and Magseis Fairfield teams for the excellent operational and HSE performance, especially within the current Covid-19 context. The new high-technology data set will complement CGG’s extensive high-quality Cornerstone towed-streamer data library, providing our clients with the best available information to de-risk the awarded blocks from the UK 32nd License Round and support the UK Oil & Gas Authority’s strategy for Maximizing Economic Recovery.”