Laurabada East UltracubeTM 3D Reprocessing Survey
Revolutionising Data Quality and Exploration Potential in the Gulf of Papua.
The Laurabada East Ultracube™ 3D Reprocessing Survey spans approximately 1,020 square kilometers, delivering a significant uplift in data quality, unveiling exciting new exploration potential within the nearshore Aure Fold & Thrust Belt. Source and receiver deghosting substantially improved low-frequency content, essential for imaging below the fold belt, which is dispersive and attenuative.
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 recent thrusted structures and enable high-resolution velocity modelling to improve imaging of the pre-Tertiary structure and within the fold belt.
Project Parameters
Project Size
1,019 km2
Acquisition Parameters
Acquisition Year: 2011
Vessel: HAI YANG SHI YOU 719
Streamer: Sercel SSAS
Source: 2 x 4110 cu.in
Source Volume: 4,110 cu.in
Source Depth: 6m
Streamer Length: 6,150m
Number of Streamers: 6
Shot Interval: 25m
Record Length: 9 sec
Sample Rate: 2ms
Deliverables
Processing: Western GECO
Processing Completed: 2017
Processing Bin Dimensions: 12.5m x 25m
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