CONCEPTUAL MODEL AND NUMERICAL SIMULATION UPDATE OF PATUHA GEOTHERMAL FIELD, WEST JAVA, INDONESIA

Abstract

Patuha geothermal field is located about 50 km southwest from Bandung, West Java Province, Indonesia and developed by state owned company PT Geo Dipa Energi (Persero). The field has been in operation since September 2014 with plant capacity of 55 MW. Several geoscience surveys had been carried out from 1983 until 1998. The drilling was started by Patuha Power Limited with a slim hole campaign in 1996 (17 wells) continued by drilling large and standard diameter wells until 1998 (14 wells). Since 2014, several geoscience additional activities have been carried out, such as geological mapping, geochemical survey, reprocessing geophysical data and micro earthquake survey. Integrated analysis of those geoscience data combined with all wells data are used to update Patuha conceptual model. The 3D conceptual model from all data also has been developed to give comprehensive information in the subsurface existing area and development plan area in the north Patuha. Based on the updated conceptual model, numerical model has been developed by using TOUGH2 with EOS1 and dual porosity approach. The numerical model has been validated by natural state. This paper describes the implementation of Patuha reservoir simulation to support the field development plan.