Analysis of Reservoir Temperature Estimation using Major Elements in Sulili Geothermal Field, South Sulawesi, Indonesia: Implications for Geothermal Energy Forecasts

Emi Prasetyawati Umar; Hardin Wakila; Rizky Nurul Aulia; Agriani Pongkessu; Supardin Nompo; Jamaluddin Jamaluddin

doi:10.58524/ijhes.v4i1.568

Authors

Emi Prasetyawati Umar Department of Mining Engineering, Universitas Muslim Indonesia http://orcid.org/0000-0001-5368-0140
Hardin Wakila Department of Mining Engineering, Universitas Muslim Indonesia
Rizky Nurul Aulia Department of Mining Engineering, Universitas Muslim Indonesia
Agriani Pongkessu Program Studi Teknika, Akademi Maritim Indonesia AIPI Makassar
Supardin Nompo Department of Mining Engineering, Universitas Muslim Indonesia
Jamaluddin Jamaluddin Department of Geology, University of Vienna

DOI:

https://doi.org/10.58524/ijhes.v4i1.568

Keywords:

geothermal energy, geothermometer, manifestation, major elements, reservoir temperature

Abstract

Geothermal is a natural resource energy in the form of hot water or steam that forms in reservoirs within the earth through the heating of subsurface water by hot igneous rocks. Based on field surveys, the Sulili area shows characteristics of geothermal energy in the form of hot springs. The research aims to use the Na-K geothermometer to find out the temperature of the geothermal reservoir below the ground and the Na-K-Mg geothermometer to look into the type of fluid that is in the geothermal reservoir. The research employs the geochemical analysis method in conjunction with the Na-K geothermometer method. Reservoir subsurface temperature is estimated at EPU station 1 at 326.504°C, EPU station 2 at 473.369°C, and station EPU 3 at 456.508°C. According to the results, the hot springs at the three sites are chlorides with temperatures below ground that are part of the high-temperature geothermal system and are >225°C. The hot spring is in the immature water group. Based on the calculation, the Sulili Geothermal Field with an average reservoir temperature of 418°C is approximately 68.33 MWh. This is a simplified calculation, and actual energy output can vary based on several factors, including the specific characteristics of the geothermal reservoir and the efficiency of the power plant.

Author Biographies

Supardin Nompo, Department of Mining Engineering, Universitas Muslim Indonesia

Department of Geological Engineering, Universitas Gadjah Mada, Indonesia
Jamaluddin Jamaluddin, Department of Geology, University of Vienna

Program Studi Teknik Geologi, Sekolah Tinggi Teknologi Migas Balikpapan, Indonesia

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