The Use of a Conceptual Model to Predict the Potential of Kamojang Geothermal Field Under Water Injection

Abstract

The ultimate potential of Kamojang Geothermal field is estimated by means of the conceptual model (Gomaa, 1985). To use the model, it is assumed that the brine is injected into the reservoir to extract the remain^ ing heat from the rock. It is further assumed that the reservoir is a naturally fractured system. The fluid flow mechanism in the reservoir is strongly COJI trolled by fractures, meanwhile matrix rock, acts as a source, transmits the heat to the reinjected brine by conduction. If the Kamojang Geothermal field is fully developed, it is estimated that the ultimate potential ofelectric^ ity producible from the reservoir is 15,500 Megawattyear or 517 MW for 30 years.