Open AccessAnalysis of fluid characteristics and estimation of geothermal reservoir temperature in Kaleosan Area, North Minahasa Regency
Author(s) -
Jeferson Polii,
Windy Wantalangi,
B. Tambahani,
Ravael Ratumbuysang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1968/1/012049
Subject(s) - geothermal gradient , geology , aquifer , geothermal energy , meteoric water , quartz , dilution , fluid inclusions , geochemistry , petroleum engineering , mineralogy , groundwater , geotechnical engineering , geophysics , paleontology , physics , thermodynamics
The appearance of manifestation characterizes the existence of geothermal potential. This research was conducted in the Kaleosan area of North Minahasa Regency, in North Sulawesi Province, Indonesian, which has a manifestation of hot water with a temperature of 90°C with pH of 6.89, and there are silica deposits around it, all of which are characteristics of a water-dominated geothermal reservoir. This research was carried out by analyzing the characteristics of the surface fluid samples of the Kaleosan hot water manifestations. Analysis of fluid characteristics using the Q-SO 4 -HCO 3 and Na-K-Mg. From the Q-SO 4 -HCO 3 diagram, it is found that the geothermal fluid in Kaleosan is a type of chloride. The high chloride content is thought to be due to the increase in geothermal fluids containing CO 2 and condensing in shallow aquifers. From the Na-K-Mg diagram, it is obtained that the Kaleosan hot springs are immature water where this manifestation fluid has undergone dilution and cooling by meteoric water during its trip to the surface. From the quartz silica geothermometer, the reservoir temperature estimate is 236.6°C, which indicates that the geothermal reservoir in the Kaleosan area is a high enthalpy geothermal system.