Dieng Reservoir Numerical Model: A Robust Update

Abstract

PT Geo Dipa Energi (Persero) started developing Dieng Geothermal Field in 2002 with installed plant capacity of 60 MWe. Several Dieng numerical models have been developed in 2006, 2013, and 2019. The latest Dieng numerical model was built in 2019 as the basis of feasibility study for Dieng 2 development. With additional Dieng 2 wells data, comprehensive assessment of production and injection data of Dieng 1, and deep analysis of PT shut-in data, the updated numerical model is more robust than the previous model developed in 2019. Two reservoir compartments are considered in this model i.e. Sileri and Sikidang. The natural state and history matching for 20 years of Dieng 1 production indicated the extension (horizontally and vertically) of the steam cap distribution in Sileri area.