MASSY, France – PTTEP has awarded Subsurface Imaging, part of CGG’s Geoscience division, two large-scale seismic reprocessing contracts.
Thailand’s state oil company is seeking to rejuvenate data sets from two regions offshore Malaysia.
CGG, through its offices in Kuala Lumpur, will perform merged reprocessing of surveys from various vintages, including towed-streamer and OBC seismic data acquired offshore Sabah and Sarawak.
The company expects to deliver fast-track products by mid-2021 and final workstation products by the end of 2021.
PTTEP expects the resulting images to improve definition of producing reservoirs, assist planning and drilling of future wells, and to open new plays for near-field exploration at deeper intervals.
According to CGG, the region has a complex, highly faulted subsurface in which scattered gas bodies mask the target reservoir on existing data sets.
To unmask the gas wipeout, remove distortions at reservoir level and image the bounding faults, the company will apply its proprietary imaging technologies such as high-frequency full-wavefield Time-Lag FWI (HF-FWI), Q-compensating least-squares (LS-Q) Kirchhoff PSDM and LS-Q RTM – all of which have been fine-tuned over other projects in the region, the company said.
Another focus will be on improved imaging of the deeper exploration targets, where the aim will be to improve amplitude, resolution and continuity in the mini-basins and to define the steeply dipping folds beneath the main unconformity.