The Dieng Geothermal Field, Indonesia, is a two-phase high enthalpy reservoir with a current installed capacity of 60 MW. Some liquid-dominated wells near the reservoir boundary are non-artesian, primarily due to a water column above the main feed zones. This paper elaborates on discharge stimulation carried out for several production and idle wells over the past five years, including several methods, such as air compression, well-to-well, and nitrogen injection. The analysis encompasses the discharge prediction, method selection tailored to each wellbore condition and parameter, the designed program, and actual field results while highlighting challenges and lessons learned. In general, most methods have successfully reactivated all liquid-dominated wells. However, when implementing these methods in 25-year-old wells, several technical considerations need to be taken into account to minimize the adverse effects of sudden temperature differences in the well during the transition from non-discharged to discharged conditions.

Press the Back button in your browser, or search again.

Copyright 2024, Stanford Geothermal Program: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.