ANG Blk 25 Reprocessed | PGS

Benguela Basin - Angola - 1999

ANG Blk 25 Reprocessed 3D

Multi-azimuth depth reprocessing gives a clearer image of pre and postsalt targets
Website Map for Survey ANG_25_MC3D
The generation of a multi-azimuth image with reprocessing to depth provides new insight in this West African exploration hot spot. Increased resolution of syn-rift faulting through multi-azimuth reprocessing gives explorers a greater understanding of basin structure and prospectivity.
Angola offshore acreage has world-class potential, with a proven petroleum system within both the syn-rift and post-rift sections. This is analogous to the proven producing systems along the conjugate margin of Brazil, Campos and Santos Basins.
Multi-azimuth reprocessing combined with a comprehensive depth imaging flow provides a broader frequency bandwidth for enhanced presalt illumination.

Specifications

Survey summary

  • Type: 3D
  • Geometry: Standard
  • Size: 4 906 sq.km
  • Acquisition year: 1999
  • Completion of processing: 2013
  • Reprocessing: Yes
  • Water depth: 200 – 2 200 m
  • Shooting direction: 90/270
  • Vessel: Ramform Valiant
  • In partnership with: ANPG

Acquisition parameters

  • Number of streamers: 12
  • Streamer length: 4 800 m
  • Streamer separation: 104 m
  • Shot interval: 25 m
  • Record length: 8 000 ms
  • Sample rate: 2 ms
  • Bin dimensions (Acquisition): 12.5 x 12.5 m
  • Bin dimensions (Processing): 12.5 x 12.5 m
  • Fold: 48

Processing

  • 3D surface related multiple elimination (SRME)
  • High resolution radon demultiple
  • Kirchhoff prestack depth migration (PSDM)

Depth products

  • Final Kirchhoff PSDM stack
  • Final beam PSDM stack
  • PSDM gathers
  • Velocity model
  • Angle Stacks

Additional products

  • Gravity
  • Magnetics