Central North Sea Cornerstone Surveys
Gain more insight into North Sea prospects with the highest quality seismic data
CGG offers the most recent and most advanced seismic coverage of the Central North Sea (CNS) to help you improve understanding of existing assets, better evaluate new exploration targets, identify near-field exploration opportunities and aid reservoir development.
With decades of sustained investment in this core area, our coverage includes over 50,000 km2 of broadband 3D streamer data, 12,000 km2 of dual-azimuth (DAZ) data and over 1,650 km2 of high-density OBN data acquired in 2020.
Find out more about our Cornerstone surveys below, or contact us for a data viewing.
Featured Article: New high-density OBN acquisition
Read our article in Geo Expro to learn how new Cornerstone OBN imaging illuminates deeply buried and salt-influenced reservoirs in unprecedented quality to significantly de-risk field development and near-field exploration.
Cornerstone OBN
Developed with Magseis Fairfield, this 1,650 km2 of data delivers subsurface images of unprecedented quality in the most challenging areas of the UK Central North Sea. Covering two highly prospective areas, the Cornerstone OBN survey delivers new insights for continued development of existing fields and plays. Surveys also address the challenges associated with deeper, complex Jurassic and Triassic plays, typically under high-pressure high-temperature (HPHT) conditions, and the complicated structures associated with Permian salt movement.
The 2020 phase provides a step-change in image quality for targets thanks to long-offset, full-azimuth coverage and good low-frequency signal. Final results and PS processing deliverables are available now.
- High-fidelity broadband and QI-compliant processing, featuring advanced demultiple, TL-FWI model building, and high-resolution Q imaging
- Well-sampled PS data
- Full PS processing sequence, which includes SWI and RTM imaging
Cornerstone Evolution
The Cornerstone Evolution survey includes more than 50,000 km2 of high-quality, long-offset streamer, fully merged PSDM data, with the application of CGG’s latest proprietary technologies, including 3D source-receiver deghosting, wave equation demultiple, pre-migration interbed demultiple, Q-Tomography, Q-FWI, TL-FWI, and multi-pass Q-RTM based salt scenario estimation for multi-layer tomography.
- Final PSDM image using Least-Squares Q-Kirchhoff and Wave Equation Kirchhoff migrations
- Rigorous DAZ model building based on decades of experience in the area and using extensive well control
- Seamlessly merged natively broadband and bandwidth-extended conventional data
- DAZ data set for enhanced illumination, approximately 12,000 km2 over the high-pressure high-temperature (HPHT) area
Download: Cornerstone OBN - A new benchmark for seismic image quality
Download our latest flyer to learn more on how the Cornerstone OBN dataset delivers new insights for existing fields and plays in the UK Central North Sea.
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