Publications

Exploration activity in the center of Makassar Strait where the West Sulawesi Fault Thrust Belt (WSFTB) is present is still promising especially after oil discovery under the over pressure zone in Kaluku-1 well. This paper describes structural interpretations of the southern part of WSFTB (Southern Structural Province (SSP) of Puspita et al., 2005) to identify the structural style and to define the presence of a decollement system which is believed to be a regional seal and roof of vertical migration from active petroleum system and exploration plays. Two main structural styles are present in the SSP-WSFTB. The fault propagation fold structural style were formed along the SSP, compressed and folded the sediment material above the decollement surface. Supra fault with dextral transform movement chopped the decollement surface and sediment body as compartmentalization in the SSP-WSFTB. The hydrocarbon charge can get into the supra fault section with en-echelon pattern as the migration pathway in vertical direction to the younger trap. Meanwhile in the intra compartment where the supra fault is not available, the hydrocarbon is still preserved in the older Eocene play system.