EOK2012 | PGS

East Shetland Basin - UK - 2012

EOK2012 3D GeoStreamer®

Improved and more reliable structural-stratigraphic delineation
Website Map for Survey MC3D-EOK2012
Covering the northern edge of the prolific East Shetland Basin, on a key area of the Brent Province, the survey specifically targets the Eider, Otter and Kerloch fields (Middle Jurassic).
Main basin structural features were formed during the Late Jurassic rifting. The Basin prospectivity is dominated by Middle Jurassic sand-prone reservoirs within clearly defined structural closures (e.g. Brent Group). Additional potential includes Upper Jurassic Magnus Sandstones and deeper targets.
The higher frequency content and wider bandwidth provided by true broadband GeoStreamer technology provide improved and more reliable structural-stratigraphic delineation. This results in a better understanding of the lateral distribution of the reservoirs over the mature Brent – Magnus transition.

Specifications

Survey summary

  • Type: 3D
  • GeoStreamer®
  • Geometry: Standard
  • Size: 557 sq.km
  • Acquisition year: 2012
  • Completion of processing: 2013
  • Water depth: 150 - 175 m
  • Shooting direction: 137 / 317
  • Vessel: Ramform Challenger
  • Alternate ID: MC3D-EOK2012

Acquisition parameters

  • Number of streamers: 12
  • Streamer length: 6 000 m
  • Streamer separation: 75 m
  • Shot interval: 18.75 m
  • Record length: 7 168 ms
  • Sample rate: 2 ms
  • Bin dimensions (Acquisition): 6.25 x 18.75 m
  • Bin dimensions (Processing): 12.5 x 12.5 m
  • Fold: 80

Processing

  • Dual Sensor Wave Field separation and P-UP generation
  • 3D Surface Related Multiple Elimination (SRME)
  • High Resolution Radon Demultiple
  • XT / Tau-P Deconvolution
  • Anisotropic Kirchhoff Pre-Stack Time Migration (PSTM)

Time products

  • Final Kirchhoff PSTM Stack
  • Angle Stack Near
  • Angle Stack Mid
  • Angle Stack Far
  • Angle Stack UFar
  • PSTM Gathers
  • Stacking Velocity
  • Migration Velocity