Description
PGS, in co-operation with the Cambodian National Petroleum Authority (CNPA), has completed the TSKS-08 MultiClient 2D seismic survey. 2,085 km has been acquired in the Tonle Sap and Kompong Som Basins, onshore Kingdom of Cambodia.
The MultiClient terms and broad scope will enable oil companies to access data across block boundaries thus providing better understanding of the regional geological development.
There was no existing seismic data in this area, hence the data will result in a step change in the understanding of the structural and seismic stratigraphic framework of the basins. Seimic data and geological field work completed around the Tonle Sap Lake will enable oil companies to evaluate the petroleum system and understand the geological development. Numerous leads have been identified on the data (see line examples), where the main play is believed to be the Permian carbonates. There are also potential Jurassic / Cretaceous and Triassiac clastic plays identified in this area. Furthermore, excellent Triassic and Permian source rocks, such as in the Korat Basin and Phu Quoc Basins, are believed to exist in the area.
SURVEY AREA
2,085 km
ACQUISITION DETAILS:
Live channels: 280 / 560
Group interval: 25 / 12.5 metres
Geophones per group: 6
Source interval: 25 / 12.5 metres
Thumps per source point: 1 to 4
Fold: 140/280
Record Length: 6 seconds
Sample Rate: 2 ms
Max Offset: 3493.75 m
Min Offset: 6.25 m
Majority of program acquired at 12.5m groups, 12.5m source, and 280 fold.
Source:
Accelerated Weight Drop: 1400lb Hammer with 8000 psi downward pressure
Frequency: 10-250 Hz
PROCESSING DETAILS:
Shot and Channel editing
Ensemble stack, 2 or 4 records per thumper point
Geometry
TFD Noise removal
Refraction statics
Amplitude recovery
Linear noise removal
Deconvolution
Velocity analysis (2 iteration)
Residual statics (2 iteration)
AGC 500ms
DMO
Velocity analysis
Spectral whitening
NMO
AGC 500ms
Stack
FX-Deconvolution
Finite Difference Time Migration
Eigenvector filtering
Apply time variant filter