Resource Evaluation and Development Strategy, Awibengkok Field

Abstract

The Awibengkok geothermal field, west java, Indonesia began generation of 110 MWe in early 1994 and is currently being expanded to 330 MWe. The initial series of five exploration wells delineated a geothermal resource with high temperatures, substantial volume and relatively benign fluids. Interference testing utilizing the exploration wells was successfully used to measure field permeability. Based on high measured field permeability, large diameter wells were drilled to demonstrate commercial deliverability. A numeric modeling approach recognizing the uncertainty in interference tests and other factors was implemented to determine the production capacity of the reservoir. The numeric model continuously refined and calibrated fo field performance demonstrated that the field can sustain 330 MWe over the contract live and provides a basis for optimizing reservoir management strategies.