Laurabada West UltracubeTM 3D Reprocessing Survey
Elevating Data Quality and Exploration Potential in the Gulf of Papua
The Laurabada West Ultracubeâ„¢ 3D Reprocessing Survey covers approximately 770 square kilometers, with this reprocessing effort has resulting in a substantial improvement in data quality, unlocking exciting new exploration possibilities in the outboard Gulf of Papua. Source and receiver deghosting have significantly enhanced the low-frequency content, which is particularly beneficial for penetrating the large, absorptive carbonate bodies found in Laurabada West.
Legacy processing relied on isotropic PSTM and 2D SRME for demultiple, whereas the current reprocessing, completed by WesternGeco, utilised 3D GSMP/SRME and anisotropic TTI pre-stack depth migration to help address complex diffracted multiples associated with the carbonate bodies and enable high-resolution velocity modelling to improve imaging on the flanks and below the base of carbonate pinnacles.
Project Parameters
Project Size
768 km2
Acquisition Parameters
Acquisition Year: 2011
Vessel: BGP Explorer
Streamer: Sercel Sentinel Solid Streamer
Source: 2 x 3,090 cu.in
Source Volume: 3,090 cu.in
Source Depth: 6m
Streamer Length: 6,150m
Number of Streamers: 3
Shot Interval: 25m
Record Length: 9 sec
Sample Rate: 2ms
Deliverables
Processing: WesternGECO
Processing Completed: 2018
Processing Bin Dimensions: 12.5m x 12.5m
Processing Flow: Source and receiver broadband deghosting, 3D SRME, 5 iterations of anisotropic tomography for velocity model building
Kirchhoff Pre-Stack Depth Migration,
Kirchhoff PSDM Full stack and 4 angle stacks,
Kirchhoff PSDM final CDP gathers,
Velocity and anisotropy products