Tertiary Deep Marine Syn-Rift to Shallow Marine-Deltaic Post-Rift Petroleum Plays in the Pase Sub-Basin, North Sumatra

Abstract

Modern broadband seismic data provides new regional insight into the underexplored deep-water offshore basin geometry of the Pase Sub-basin, from its basin segmentation with intra-basinal highs grabens to the development and prospectivity of syn-post-rift clastic reservoir sections proven in the prolific onshore area. The high degree of basin segmentation in the NW Sub-basin has led to the development of local depocenters in grabens with accumulation of thick clastic sections and potential for reservoirs sands. The clastic input and accumulation in the sub-basins were controlled by the intra basinal highs acting in periods as structural barriers disconnecting the grabens or as clastic input providers through erosion.