Abstract

KPH field is one of the geothermal working areas located in Indonesia. Several geoscientific studies have been performed to assess the prospect of the field's resources. This paper aims to determine the potential and characteristics of the KPH geothermal field system using chemical methods and natural isotopes. The analysis was performed on the manifestations spread over in eight different places. Based on the analysis, this field has two geothermal systems. Both systems were classified as having a high temperature from the calculation of CO2−Ar-H2 gas geothermometer. All water manifestation originated from meteoric water, which underwent interaction between fluid and rock before it appears to the surface. The calculation of geothermal potential using convection heat loss method showed a result of 12.55 MWth. KPH field is very prospective to be developed with the prospect area based on the soil survey located around KBA crater, SMP, and BBG manifestations. However, further studies are required on the existence of two geothermal systems.

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