Gwydion | PGS

Browse Basin - Australia

Gwydion 3D

This dataset survey covers the Gwydion oil discovery on the Yampi Shelf, Browse Basin
Website Map for Survey Gwydion MC3D
The Gwydion discovery challenges the perception of the Browse Basin as being solely gas-prone, providing proof of oil generation and migration within the Browse Basin.
The target is marine Lower Cretaceous sandstones that are draped over a prominent Basement high.
3D seismic data to better understand structural complexity of survey area.


Survey summary

  • Type: 3D
  • Geometry: Standard
  • Size: 198
  • Acquisition year: 2011
  • Completion of processing: 2011
  • Water depth: 70-90 m
  • Shooting direction: NW/SE
  • Vessel: Pacific

Acquisition parameters

  • Number of streamers: 6
  • Streamer length: 6000 m
  • Streamer separation: 100 m
  • Shot interval: 12.5 m
  • Record length: 4608 ms
  • Sample rate: 2 ms


  • 2D surface related multiple elimination (SRME)
  • High resolution radon demultiple
  • Kirchhoff prestack time migration (PSTM)

Time products

  • Final Kirchhoff PSTM Stack
  • PSTM gathers
  • Stacking velocity
  • Migration velocity
  • Angle Stacks