Geology

Sabah has a proven petroleum system, within the Miocene-Pliocene fold and thrust belt, that is the location of numerous hydrocarbon discoveries and multiple producing fields.

The uplift in quality provided so far by the Sabah MC3D multisensor broadband seismic data, has allowed clear delineation of the seismic facies within the complex Miocene-Pliocene fold and thrust belt.  The deeper sections below the fold and thrust belt have been clearly imaged for the first time, enabling a better understanding of the basin development and deeper targets.

Across the Sabah Trough and in the area of the Dangerous Grounds the new seismic reveals numerous potential prospects, many with direct hydrocarbon indicators (DHI) similar to that of a recent discovery well.    

3D Miocene carbonates
Superior resolution of untested top Miocene carbonate structures.

 

Sabah Trough and Dangerous Grounds

The high-quality broadband seismic images reveal, with rich clarity, the pre-rift and syn-rift sediments in multiple prospective basins. Basin opening carbonate and clastic plays are strikingly presented in 3D, offering a rare opportunity to observe complete petroleum systems, from deep-seated source rocks and migration pathways to potential reservoirs and competent seals. 

Carbonates in the Sabah Trough

Closures at the carbonate build-up level are believed to be the same play targeted by the Tepat-1 well. Other potential basin opening leads include syn-rift and pre-rift clastics that exhibit typical extensional regime tectonics with tilted fault-block geometries. These clastics are thought to provide the main source rock interval for the area and additionally serve as potential for continental to shallow marine clastic reservoirs.

Shallower in the section, Miocene-Pliocene basin-floor fans are observed to trap stratigraphically against the outer most thrusts faults or display subtle roll-over anticlinces, with only a short and direct migration path from the rifted kitchen depocentres.

Crossline PSTM TWT showing Carbonate build-ups in the Sabah Trough.
Crossline PSTM TWT showing Carbonate build-ups in the Sabah Trough.

 

Inline PSTM TWT Sabah Fold and Thrust belt and Sabah Trough
Inline PSTM TWT Sabah Fold and Thrust belt and Sabah Trough.