Mengidentifikasi Potensi Kesekatan Sesar Menggunakan Metode Shale Gouge Ratio pada Sumur “X” Formasi Challis di Cekungan Bonaparte Indonesia

Abstract

The Bonaparte Basin is a Paleozoic-aged basin located between northwestern Australia and Timor Island. Stratigraphically, this basin consists of Upper Permian to Pliocene-aged rocks, with dominant lithologies including claystone, siltstone, sandstone, and limestone. Given this stratigraphic composition, the Bonaparte Basin has the potential for a petroleum system that can be explored, particularly in the Upper Triassic interval. The Challis Formation, composed of sandstone interbedded with claystone, can serve as a reservoir within the petroleum system. In addition to a good reservoir, the highly active tectonic conditions during the formation of the Bonaparte Basin led to the development of faults, which influence whether hydrocarbons can be sealed or if leakage occurs in a reservoir. Therefore, a fault seal analysis was conducted to determine whether the faults within the Challis Formation interval can effectively seal hydrocarbons or if leakage is present. This analysis was performed using the Shale Gouge Ratio (SGR) method on seven reservoirs, revealing that the faults within the Challis Formation interval can serve as effective hydrocarbon accumulation sites or be fully sealing at a throw of 440.2 meters