OSLO, Norway– PGS, in cooperation with Sonangol, has started a 3D multi-client GeoStreamer survey over the shallow-water shelf area of the Kwanza basin off Angola.
This new multi-sensor 3D GeoStreamer survey, together with gravity and magnetic data, over the central part of the shelf (blocks 6, 7, and 8) will identify and unlock the underexplored presalt and postsalt plays. The acquisition configuration uses triple-source with 12 x 8,025 m streamers operating in fan mode and multi-sensor GeoStreamer technology, to provide clearer images with reliable attributes.
A modern prestack depth processing workflow, the company said, has been tailored to the imaging challenges of subsalt stratigraphy within a shallow-water setting. The preprocessing will include targeted 3D shallow-water demultiple, while the velocity model build will include full waveform inversion together with separated wavefield imaging using PGS SWIM.
Deliverables will include PSDM Kirchhoff stack, RTM PSDM, angle gathers, velocity models, as well as gravity and magnetic data.