Publications

The South Palembang Sub-basin is a part of the South Sumatra Basin that has deeper burial history than other sub-basin in this area. Therefore, this subbasin has the potential to be the best kitchen in this area. The depth of subsidence is influenced by tectonics that control and will affect the stratigraphic framework. This study aims to understand the tectonic subsidence signature of the South Palembang Subbasin and indicate the tectonic event which affects during the basin formation. Numerous data sources were incorporated in this study, such as cuttings, cores, seismic, well logs, and biostratigraphic data, in order to processed using the back-stripping method to generate subsidence history interpretations. This interpretation indicates that there are more than one tectonic subsidence signatures during the Paleogene rifting of the South Palembang Sub-basin. The first rifting occurs during the formation of the Lahat formation, has a subsidence rate of 0.12 mm/yr with duration of 6.11 m.y. that shows rift basin tectonic subsidence signature. Then the second rifting occurs during the formation of the lower to middle part of the Talangakar Formation, has a subsidence rate of 1.05 mm/yr with a duration of 1.61 m.y. that shows strike-slip basin tectonic subsidence signature. Both are separated by intra-uplift in Late Oligocene. The identification of multi-tectonic subsidence signatures provides an answer to why the South Palembang sub-basin has the deepest burial history and will affect the play concepts in this area. In the Lahat Formation, facies variations changed slowly so that thick source rocks and reservoir rocks occurred. Unfortunately, rifting in the Lahat Formation occurs in the marine environment so that the lacustrine source rocks were not formed. In the Talangakar Formation, rapid subsidence rates caused the environment to change rapidly so it is difficult to find thick source rocks and reservoir rocks.