ANG Kwanza | PGS

Kwanza/Benguela Basin - Angola - 2012

ANG Kwanza 3D GeoStreamer

26 400 sq. km of GeoStreamer data unlocks presalt potential in the Kwanza and Benguela Basins
Website Map for Survey ANG 2012 ppv6
This high quality broadband GeoStreamer 3D dataset in the prospective Angolan offshore provides unparalleled imaging of presalt syn-rift basin structure and prospectivity.
Explore using a clearer image of the presalt syn-rift sediments, and sag-phase carbonates. Ideal for prospect identification and analysis, and enabling direct comparisons with the presalt of the prolific Brazilian margin.
Broadband GeoStreamer acquisition paired with a velocity model building workflow processed to depth results in the clearest image below complex salt geometries. Higher frequency content allows salt bodies to be delineated and broader low frequencies provide uplift in the presalt section.

Specifications

Survey summary

  • Type: 3D
  • GeoStreamer
  • Geometry: Standard
  • Size: 26 300 sq.km
  • Acquisition year: 2012
  • Completion of processing: 2014
  • Water depth: 200 - 3 000 m
  • Shooting direction: 180/360
  • Vessels: Ramform Valiant, PGS Apollo
  • In partnership with: ANPG

Acquisition parameters

  • Number of streamers: 10
  • Streamer length: 8 100 m
  • Streamer separation: 100 m
  • Shot interval: 25 m
  • Record length: 10 000 ms
  • Sample rate: 2 ms
  • Bin dimensions (Acquisition): 6.25 x 25 m
  • Bin dimensions (Processing): 12.5 x 12.5 m
  • Fold: 81

Processing

  • P-UP generation
  • 3D surface related multiple elimination (SRME)
  • High resolution radon demultiple
  • Kirchhoff prestack time migration (PSTM)
  • Kirchhoff prestack depth migration (PSDM)
  • Beam depth migration

Depth products

  • Final Kirchhoff PSDM stack
  • Final beam PSDM stack
  • PSDM gathers
  • Velocity model
  • Angle Stacks
  • Final WEM PSDM Stack (Blk 25 & 40)
  • Final MAZ PSDM Stack (Blk 24)

Time products

  • Final post-stack time migration
  • PSTM gathers
  • Angle Stacks

Additional products

  • Gravity
  • Magnetics