Assessing the possibility of Enhanced Geothermal System in western Indonesia

5th ITB International Geothermal Workshop

Hendrawan, R.N.^1 ; Draniswari, W.A.^1

Geological Engineering, Master Program, Bandung Institute of Technology, Indonesia^1

关键词: Continental margin;    Enhanced geothermal systems;    Fractured reservoir;    Geothermal systems;    Low permeability rock;    Potential reservoir;    South Sumatra Basin;    Structural control;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/42/1/012021/pdf
DOI  :  10.1088/1755-1315/42/1/012021

来源: IOP

【 摘 要 】

Enhanced Geothermal System (EGS) is one of geothermal system where abnormally hot masses of low permeability rocks are found at depth. Most of EGS are related to thick and deep sedimentary basin with plutons. EGS focused on drilling at hot crystalline rock and create fractured reservoirs. Indonesia has a complex tectonic setting. There were more than 86 basins in Indonesia. Most of sedimentary basins in Indonesia were tectonically stressed. Moreover, the tectonic setting which is generally a part of the Active Continental Margin also allows the formation of plutons that can be act as hot dry rock. Several hot springs or other geothermal manifestation were found in several areas within the basin and its surrounding area. This study compares structural controls and models in different tectonic setting of main basin in Western Indonesia to get the most suitable potential reservoir for EGS. The characteristic of the South Sumatra Basin, North Sumatra Basin, East Java Basin and Tarakan Basin were evaluated and compared based on its geology and geophysics characteristic. As the result, South Sumatra Basin is the first rank for EGS suitability in Western Indonesia.