ANG Namibe | PGS

Namibe Basin - Angola - 2014

ANG Namibe 3D GeoStreamer®

Reveals pre and postsalt prospectivity of this frontier basin
Website Map for Survey Block 27-28-29
Over 11 100 sq. km of data covering Angolan offshore blocks 27, 28, 29 and 11.
Exploration targets include thick syn-rift and sag sedimentary successions, which lie beneath a well-developed evaporite layer, together with a sand-rich postsalt interval.
Multisensor 3D GeoStreamer data has been combined with modern processing and imaging workflows to identify and unlock the presalt and postsalt plays.

Specifications

Survey summary

  • Type: 3D
  • GeoStreamer®
  • Geometry: Standard
  • Size: 11 134 sq.km
  • Acquisition year: 2014
  • Completion of processing: 2016
  • Water depth: 100 - 3 000 m
  • Shooting direction: 14/194
  • Vessel: Ramform Valiant
  • In partnership with: ANPG

Acquisition parameters

  • Number of streamers: 12
  • Streamer length: 8 100 m
  • Streamer separation: 100 m
  • Shot interval: 25 m
  • Record length: 10 240 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 depth migration (PSDM)
  • Beam depth migration

Depth products

  • Final Kirchhoff PSDM stack
  • Final beam PSDM stack
  • Final Kirchhoff offset gathers
  • Raw beam PSDM stack
  • Raw Kirchhoff PSDM stack
  • Raw Kirchhoff PSDM angle sub-stacks
  • Final Kirchhoff PSDM angle sub-stacks

Time products

  • Final demultiple shot gathers
  • Final regularized CMP gathers

Additional products

  • Gravity
  • Magnetics