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The AAPG/Datapages Combined Publications Database
Southeast Asia Petroleum Exploration Society (SEAPEX)
Abstract
Abstract: New revelations from the latest multi-client seismic data; Dangerous Grounds to the Sabah Trough, NW Borneo Malaysia
Outboard of the Sabah Trough lies the NW Sabah Platform, also known as the Dangerous Grounds (Fig.1). Never seen before PSDM seismic data from the Dangerous Grounds is revealed and presented in this paper. The newly acquired Sabah 2D ties into the Sabah 3D and provides the ultimate exploration tool across this vast underexplored region. The Sabah Trough hosts several discoveries in the pre-MMU play and the data shows the relationship and the lateral extent of this Play all the way out to the unknown Dangerous Grounds.
Figure 1. Map on left showing the geological provinces of NW Borneo and the footprint of the Sabah 3D. The image on right shows seabed amplitude extraction from the Sabah 3D. Note the drainage systems coming from the NW down into the Sabah Trough. The map on right also shows the location of the newly acquired North Sabah 2D over the Dangerous Grounds.
The Dangerous Grounds consist of continental fault blocks that formed during an extensional phase during the Eocene-Oligocene period, evidence by syn-rift sequences. Newly acquired seismic in 2024 confirms that there are thick sediment packages throughout the Dangerous Grounds (Fig. 2). Numerous half-graben systems can be observed on the seismic and likely to be associated with the opening of the South China Sea. These pre-rift and syn-rift sequences (pre-MMU Play) out in the Dangerous Grounds potentially host the same source rocks which are thought to have charged the Tepat and Pekaka discoveries along the Sabah Trough.
Figure 2. Geo-seismic section through North Sabah Dangerous Grounds.
Acknowledgments and Associated Footnotes
1 Tad Choi: TGS; [email protected]
2 Nicolas Hand: TGS
Tad is currently with TGS as a Business Development Manager for the AP region and is based in Perth. He has over 2 decades of experience in the oil and gas industry. He started his career in 2002 with Woodside Energy, where he spent 10 years as an Exploration Geologist. He then joined PGS (now TGS) as a Principal Geoscientist and Sales Manager. He holds a Master’s and a PhD degree in geology from Niigata University Japan, where he studied the Tertiary back-arc basins of Japan. In his spare time, he is a lead guitarist for a rock band in Perth.
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