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CGG and Magseis Fairfield complete North Sea's largest ever OBN survey

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Oilfield Technology,

CGG and Magseis Fairfield have announced their completion of 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 and has already received significant industry interest and prefunding. Approximately 1650 km² of long-offset, full-azimuth data have been acquired, with first images being made available in early 2021 and final PSDM data planned for release in 4Q21. Further extensions of the OBN Cornerstone survey are being considered for 2021.

Covering two highly prospective 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 advanced imaging technologies, providing a step-change in seismic imaging quality and reservoir characterisation detail and bringing new insight to aid continued development of plays and existing fields in the Central North Sea region.

This survey is specifically designed to address 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.

Sophie Zurquiyah, CEO, CGG, said: “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.”

“As our clients have shifted their focus from wider exploration to enhancing production from existing fields and unlocking further potential near existing infrastructure, we see great potential for collaborative OBN multi-client surveys,” said Carel Hooijkaas, CEO, Magseis Fairfield. “In mature areas where generations of streamer data and reprocessing have yet to fully overcome complex challenges, full-azimuth and/or converted wave data along with advanced processing algorithms play a key role in maximising value from existing infrastructure. The OBN Cornerstone survey will bring new insight to complex geology and deep targets. We look forward to continuing our collaboration with CGG and the industry to explore potential for extensions in the coming seasons.”

Read the latest issue of Oilfield Technology in full for free: Oilfield Technology's November/December 2020 issue

The November/December issue of Oilfield Technology begins by reviewing the state of the North Sea before moving on to cover a range of topics, including Drilling Technologies, Deepwater Operations, Flow Control.

Contributors come from Varel Energy Solutions, Gyrodata, Clariant Oil Services, Drillmec and many more.

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