Publications

The hydrocarbon potential in Central Java especially in the Banyumas sub-Basin is still questioning. Strong hydrocarbon indication comes from many of seepages which appears in the entire location and some uneconomic discovery wells. The problem in this area is still the same, poor imaging of the sub-surface condition due to poor seismic quality as the impact of the absorption of source energy by the thick volcanic material during seismic acquisition. This limited situation creates big uncertainties to figure out the hydrocarbon accumulation in the reservoir formation. Halang Formation is the Miocene sediment which deposited in the deepwater turbidite system with provenance from the northern part to the southern part of the Central Java region (Bernando, 2018). The understanding of the deposition system is in line with the story of Karang Sambung area, as the ophiolite melange complex of subduction trench (ultra-deepwater) uplifted during Miocene time as an impact of docking system from two-strike slips conjugate which bordering Central Java area, Pamanukan-Cilacap Fault and Kebumen-Muria Fault (Satyana, 2009). The Halang Formation is also believed as a carrier bed and reservoirs for hydrocarbon accumulation in the area. The paleo-environment deposition map of deepwater turbidite Halang Formation is re-produced in this paper using sets of surface data and combined with limited seismic data to locate the good quality reservoir position and delineate some prospective zone in this area. Some submarine fan facies of Halang Formation is associated with the stratigraphic trap overlaid above suspected potential source rock of Rambatan Formation in the flange of Banyumas sub-basin. Following this new insight, hopefully, will encourage exploration activities in this �frontier� area to discover the economic and produceable hydrocarbon accumulation.