Green Canyon - USA - 2008

OBC 3 3D

Dual sensor 3D full volume depth products from the Flex Trend ocean bottom cable survey
Website Map for Survey OBC 3
The Flex Trend is a contiguous area covering ~1500 OCS blocks, comprised of ten individual PSDM projects, reprocessed from 19 baseline surveys.
Exploration efforts on the shelf have historically focused on shallow targets. FlexR reveals significant further exploration potential in the lower Miocene deep gas play. Depth imaging is required due to the presence of salt.
The FlexR reprocessing project provides an updated inventory of detailed 3D seismic imaging over the Flex Trend. Better salt and subsalt imaging and enhanced fault definition are achieved through detailed velocity modeling, Kirchhoff, and wave equation prestack depth migration.


Survey summary

  • Type: 3D
  • Geometry: Other
  • Size: 1133.4 sq.km
  • Acquisition year: 2008
  • Completion of processing: 2008
  • Shooting direction: N - S
  • Vessel: Boubon, Beulah Chouest

Acquisition parameters

  • Streamer length: Ocean Bottom Cable Dual Sensor 8000m Offset m
  • Shot interval: 31.25 m
  • Record length: 13000 ms
  • Sample rate: 2 ms
  • Bin dimensions (Acquisition): 25 x 25 m
  • Bin dimensions (Processing): 25 x 40 m
  • Fold: 128


  • High resolution radon demultiple
  • Beam depth migration
  • Kirchhoff prestack time migration (PSTM)
  • Kirchhoff prestack depth migration (PSDM)

Depth products

  • Final Kirchhoff PSDM stack
  • Final beam PSDM stack
  • Final WEM PSDM stack
  • PSDM gathers
  • Velocity model

Time products

  • Final Kirchhoff PSTM Stack
  • Angle stack near
  • Angle stack mid
  • Angle stack far
  • PSTM gathers
  • Stacking velocity
  • Migration velocity

Additional products

  • Demultiple Gathers