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Integrating Geophysics, Geology, and Geochemistry Methods for Shallow Biogenic Gas Exploration in Indonesia
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
Shallow biogenic gas has long known as a drilling hazard in petroleum industry which responsible for several blowouts in the past time. Despite its infamous name in the industry, biogenic gas usually composed of more than 95% methane and it contains considerable amount of global reserve to be produced in a relatively shallow area. In order to turn biogenic gas into a production horizon, different treatments are needed. This research took place in Bentu PSC, Talangjimar Field, and Tunu Field which are distributed in Central Sumatra Basin, South Sumatra Basin, and Kutai Basin respectively. By integrating AVO analysis (geophysics), burial history and geothermal gradient (geology), as well as carbon isotope and gas composition (geochemistry), one can easily detect the presence of biogenic gas in the subsurface area along with its origin and quality. Our investigation suggested that by combining the three geosciences elements, the chance of exploration success may increase significantly, leading to the addition of biogenic gas reserve to be produced in the future.