Acquisition

Ultra-high resolution imaging starts with innovative seismic data acquisition. 

Until recently almost all existing seismic data from the Barents Sea was 2D and of variable quality, but with the advent of GeoStreamer technology and optimized survey design parameters, PGS has produced superior 3D GeoStreamer MultiClient seismic data coverage for accurate and upgraded imaging of both shallow and deeper targets in the Barents Sea.

Acquisition Solutions Uniquely Suitable for the Barents Sea

Tailored acquisition and imaging solutions using a novel configuration for the Barents Sea, include

  • Multi-azimuth illumination acquisition available with GeoStreamer X for complementing existing GeoStreamer coverage and upgrading conventional 3D data coverage
  • Variable streamer length set-up for a ‘2 in 1 solution’ - an ultra-high density survey for imaging, and long offsets for advanced FWI velocity analysis of all targets
  • Sixteen multisensor streamers towed with a dense separation of 56.25 m and a triple-source set-up to provide CMP bin dimensions of 6.25 m x 9.375 m
  • Dense spatial sampling for improved seismic image resolution, with sufficient near-incidence angle coverage to preserve high frequencies for detailed stratigraphy and reliable AVO analysis
  • Ultra-high capacity vessels, like the PGS Ramform fleet, facilitate wide-tow sources for optimal near offset coverage and can cover large areas in one season

Acquisition Planning

In addition to existing 2D and 3D seismic and EM data coverage in the Barents Sea, PGS’ Hammerfest Basin ultra-high-density high-resolution dataset is now available and will be extended in 2020 to include open acreage. Full integrity data resolves the challenges in this complex area through an innovative combination of streamer setup and advanced imaging technologies. It has produced breakthrough images of both shallow highs and deeper basins resolving beds as thin as eight meters and is a foundation for detailed stratigraphy and reliable AVO analysis.

Streamer Set-Up
In 2018, PGS utilized a novel acquisition setup for acquiring an ultra-high density 3D seismic dataset in the Barents Sea, covering parts of the Hammerfest Basin and the Finnmark Platform. In addition to 16 densely spaced streamers, three streamers were extended from 7 km to 10 km length, allowing the recording of diving wave FWI to produce deeper updates.