During 1989 to 2000, Pertamina Geothermal Energy (PGE) has drilled 100 wells in 6 geothermal prospect with total proven reserve of 1,945 MW. The well drilled for electricity-generating capabilities are exist and being developed from. One of these areas is Sibayak Geothermal.
Darma, S, etc. 2010. “Geothermal Energy Update: Geothermal Energy Development and Utilization in Indonesia”. Bali, Indonesia: Proceedings World Geothermal Congress 2010
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Atmojo, J.P, etc.2001. “Numerical Modeling Study of Sibayak Geothermal Reservoir, North Sumatra, Indonesia”. California: PROCEEDINGS, Twenty-Sixth Workshop on Geothermal Reservoir Engineering