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Dewi Gentana
Fakultas Teknik Geologi, Universitas Padjadjaran
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TIPE DAN ESTIMASI TEMPERATUR AIR BAWAH PERMUKAAN DAERAH PANAS BUMI GUNUNG PAPANDAYAN, GARUT, JAWA BARAT Fauzan Thaha Assegaf; Agus Didit Haryanto; Johanes Hutabarat; Dewi Gentana
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 5 No 1 (2020): Jurnal Geominerba - 2020
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7006.495 KB)

Abstract

The location of the Papandayan study area is administratively located in the Cisurupan District, Regency Garut, West Java Province, was chosen as a research site because estimated to be an area that has geothermal potential. The purpose of this study is to determine the direction of the alignment of the structure, type of fluid, origin, and approximate subsurface temperature of the geothermal fluid.The method used in this research is DEM-SRTM image to determine the pattern of ridge and valley alignment that reflects the geological structure in the study area. Data processing of geochemical laboratory analysis results of geothermal fluid and remote sensing are supported by observing the phenomenon of landscape, geological structure and physical properties of geothermal manifestations on the surface in the field. The results of the alignment analysis of the SRTM-DEM image processed in the rosset diagram shows the alignment pattern (geological structure) in the study area tend to have North East-South West. The results of water chemical data plotting in the Cl-SO4-HCO3, Cl-Li-B and Na-K-Mg ternary diagrams show the characteristics, types of water in the study area as chloride-sulfate and sulfate types. The fluids move to the surface as an upflow and have been mixed and diluted with shallow ground water or meteoric water, and significant reaction occurs between the fluid and the wall rock which it passes. The results of the calculation by using water geothermometer, it can be estimated that subsurface temperature in the study area between 170°C-237°C.
EVALUASI KONDISI RESERVOIR BERDASARKAN MONITORING GEOKIMIA FLUIDA PADA SUMUR PRODUKSI AGS-2 DAN AGS-8 LAPANGAN PANAS BUMI PATUHA, JAWA BARAT Ari Gunawan Sentosa; Agus Didit Haryanto; Dewi Gentana; Hendy Sujarmaitanto
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 7 No 2 (2022): Jurnal Geominerba 2022
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v7i2.102

Abstract

Patuha Geothermal Field is a vapor-dominated fluid system that mostly produces dry steam which associated with Quaternary Patuha Volcano. This field is located in Bandung Regency, West Java and has been exploited since 2014. This exploitation can cause changes in fluid characteristics of reservoir therefore the monitoring activity is carried out to identify these changes. This study uses fluid chemistry and tracer flow test data from two production wells, AGS-2 and AGS-8. The method used is a geochemical analysis of geothermal fluids. The results showed that the fluid from these wells are still influenced by magmatic volatiles which AGS-8 shows higher intensity than AGS-2. The concentration of non-condensable gases (NCG) has decreased since the start of exploitation, indicates that the boiling process is still ongoing in reservoir. AGS-2 well has meteoric water influx which causes the low value of dryness and enthalpy ​​also high potential of silica scaling compared to AGS-8.
Co-Authors Agus Didit Haryanto Ari Gunawan Sentosa Fauzan Thaha Assegaf Hendy Sujarmaitanto Johanes Hutabarat