Publications

The exploration area of focus for this study is located at the western edge of the Central Sumatran Basin. Three exploration wells were drilled to 6500 ft (MD). The wells discovered oil in the Early Miocene Lower Sihapas Formation estuarine sandstone. The gross reservoir interval was up to 140 ft. thick, exhibiting low resistivity typically between 6 – 8 Ohm meters. Each well tested up to 3000 BOPD of 44 API oil with zero water and minimal gas. The resistivity of the Lower Sihapas oil-filled sands is lower than the resistivity of underlying Upper Pematang water-filled sands. This paper will explain the exploration and development strategy for these low-resistivity sands, which can be applied to other similar areas. Keywords: Success story, low resistivity zone, exploration block, Central Sumatran Basin