Greater Castberg, Barents Sea

Greater Castberg TopSeis™ data delivers enhanced reservoir imaging in the Barents Sea, with data covering the Johan Castberg field, existing licenses and open acreage. The play types vary in age from Devonian basement to Paleogene. Acquired in 2019 in cooperation with TGS, data has been processed using the latest velocity modeling and imaging technology, including time-lag Q-full-waveform inversion (TL-QFWI). This unique TopSeis solution combines an innovative source-over-spread configuration with CGG’s advanced imaging technology and delivers improved images in the complex Barents Sea environment.

Highlights

5,168 sq kilometers of multi-client PSDM data (available now)
TopSeis configuration with five wide-spread sources deployed above the spread
Additional source on the streamer vessel to provide long-offset data for FWI and deep imaging
Superior reservoir imaging with rich near offsets, high trace density and low noise
Time-lag Q-full-waveform inversion (TL-QFWI)
Unique, detailed velocity model and well calibration
Enhanced reservoir characterization with high-quality AVO information
Verification of AVO compliance at key processing stages
One-stop data set providing excellent delineation of targets from shallow to intermediate depths

Multi-client seismic surveys – Greater Castberg

Advanced Imaging with TL-QFWI

The slider image shows the final Kirchhoff PSDM stack blended with the time-lag Q-FWI velocity model along a seismic line from the Bjørnøyrenna fault complex, passing through three discoveries: Skavl (left), Skrugard (centre left) and Nunatak (right). The Skavl and Skrugard discoveries were made in the early-to-middle Jurassic deposits while the Nunatak reservoir is of Early Cretaceous age.

The TL-QFWI model shows a high level of geological detail, including some of the fluid contacts in the reservoirs.