Perpustakaan Digital ITB

Indonesia is one of the most promising regions for geothermal energy development. Harnessing this potential requires a thorough understanding of the geothermal systems, which can be achieved through comprehensive natural state modelling. Rantau Dedap geothermal field is located in Lahat and Muara Enim Regency, about 200 km SW of Palembang City, and has reached Phase 1 commercial operation with capacity of 91.2 MW on late 2021. This study aims to create the natural state modelling of the reservoir by utilizing data obtained from published studies. The simulation modelling was conducted using tNavigator software. The natural state modelling result is matched in general as its temperature and heat flow align with the observed data, though there may still need more adjustment for further improvement. Using parameters from simulation result and literature review, the field's potential resource was estimated using the volumetric method combined with Monte Carlo probabilistic simulation and, the calculated reserves are 23.7 MWe in P10, 72.7 MWe in P50, and 146.3 MWe in P90.