Predictions of Rock Temperature Evolution at the Lahendong Geothermal Field by Coupled Numerical Model with Discrete Fracture Model Scheme

Muhammad Qarinur, Sho Ogata, Naoki Kinoshita and Hideaki Yasuhara
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Muhammad Qarinur: Department of Civil and Environmental Engineering, Ehime University, Matsuyama 790-8577, Japan
Sho Ogata: Division of Global Architecture, Graduate School of Engineering, Osaka University, Osaka 565-0871, Japan
Naoki Kinoshita: Department of Civil and Environmental Engineering, Ehime University, Matsuyama 790-8577, Japan
Hideaki Yasuhara: Department of Civil and Environmental Engineering, Ehime University, Matsuyama 790-8577, Japan

Energies, 2020, vol. 13, issue 12, 1-23

Abstract: The comprehensive exploitation of geothermal fields has an impact on the productivity of the reservoirs. To realize sustainable steam production, changes in the rock temperature need to be predicted and controlled. A coupled thermo-hydro-mechanical (THM) model employing COMSOL Multiphysics was proposed to study the characteristics of heat transfer, fluid flow, and solid deformation at the Lahendong geothermal field, in North Sulawesi, Indonesia. The numerical results were compared with analytical and measured data in order to validate the numerical simulation. Based on the results, the predicted temperatures of the production wells showed significant decrease with the production time. In addition, a reduction in the reservoir temperature leads to lower specific gross electrical power within the production well, which should significantly reduce the sustainability of the power plant.

Keywords: geothermal reservoir; reservoir temperature; THM coupling; numerical simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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