PGS has released a newly reprocessed dataset targeting UK 32nd Round licensing opportunities in the Central Viking Graben .
PGS has released a newly reprocessed dataset targeting UK 32nd Round licensing opportunities in the Central Viking Graben. PGS19M04VIK is a high-density, AVO-compliant seismic dataset that clearly defines stratigraphy and basin structures.
It covers key UKCS-producing fields such as Maclure, Beryl, Bruce, and Nevis, and highlights significant nearfield upside potential and exploration targets. Extending on to the East Shetland Platform, this dataset clearly defines the basin configuration into the Triassic and images the transition to, and the structure of, the platform.
PGS19M04VIK covers existing fields ranging from Triassic-Jurassic structural closures to Eocene injectites in the depocentres. Eocene injectites have been the source of several recent successful drilling campaigns, said PGS.
Paleozoic structures may exist at the margin and on the East Shetland Platform and these are clearly imaged on the dataset.
Reprocessing of this legacy GeoStreamer data has included regeneration of P-UP with 2020 workflows and application of demultiple methods, including the separated wavefield imaging (PGS SWIM) and focused pre- and post-migration processing techniques. PGS FWI, based on reflections and refractions, was used to construct a high-resolution, high-fidelity velocity model. Those deep velocity updates have resulted in improved subsurface images in a fully AVO-compliant, depth-migrated dataset that supports robust reservoir characterization, said PGS.
Meanwhile, PGS has released fast-track images from its broadband 3D GeoStreamer survey of the East Shetland Platform. This survey covers frontier and mature areas relevant for the UK 32 Round with new broadband seismic data to enable reliable hydrocarbon assessment.
The acquisition phase was completed in May 2020 and early seismic data is now available. Final processing will provide high-resolution PSDM seismic data to enable mapping of the fault systems and the Brent sandstone to evaluate the HC potential.
The main reservoir levels are the Triassic Cormorant Formation and Jurassic Brent Group. The structural definition below BCU will be important to understand the source migration pathways of the Kimmeridge Clay into the structural fault blocks, which are the principal trapping mechanisms.
Data processing techniques include Complete Wavefield Imaging (CWI). Targets in the basin and on the platform will be imaged using anisotropic TTI Kirchhoff PSDM.
