Accuracy Improvement and Demonstration by Boring Survey of Steam-Spot Detection Technology for Locating Drilling Sites of Geothermal Production Wells

Principal Investigator (Affiliation)	Prof. KOIKE Katsuaki Graduate School of Engineering, Kyoto University
Co-investigator	Prof. GOTO Tadanori Graduate School of Life Science, University of Hyogo Associate Prof. KASHIWAYA Koki Graduate School of Engineering, Kyoto University Assistant Prof. KUBO Taiki Graduate School of Engineering, Kyoto University Specific Associate Prof. ASAUE Hisafumi Graduate School of Engineering, Kyoto University Specific Researcher TADA Yohei Graduate School of Engineering, Kyoto University
International Coordinator	Specific Staff KAMIGATAKUCHI Tokujiro Graduate School of Engineering, Kyoto University
Research Institutions in Japan	Kyoto University / University of Hyogo / JAXA / JAMSTEC / Mitsubishi Materials Co / Mitsubishi Materials Techno Co
Cooperating Organization in Japan	Yamanote Museum / AIST / WEST JEC
Partner Country	Republic of Indonesia
Research Institutions in Indonesia	Bandung Institute of Technology
Cooperating organization in Indonesia	Ministry of Energy and Mineral Resources of the Republic of Indonesia (MERE) / Center for Mineral, Coal and Geothermal Resources (CMCGR) / PT Geo Dipa Energi
Support Organization	JICA / Indonesian Institute of Sciences ( LIPI )
General Description of the Research Project	For large decrease of carbon dioxide emission, utilization promotion of geothermal power is needed. This research aims to develop technologies for locating accurately suitable portion to drilling of production well for geothermal power generation from the ground surface by a combination of remote sensing, geochemistry, mineralogy, and numerical simulation. The portion is termed as Steam Spot. The Patuha geothermal field, West Java, Indonesia is selected as a study area, and the research will be advanced by collaboration with Bandung Institute of Technology and an Indonesian company. Research contents include 3D fracture modeling using high-precision topographic data, radon concentration measurement at many shallow drilling points, estimations of reservoir temperature and fluid origin by water and gas geochemistry, simulation for fluid flow and specification of liquid or vapor rich zones, and potential-map production of Steam-Spot existence by integrating these results using geostatistical methods. Exploration drilling sites are narrowed at three (tentative) based on subsurface resistivity distribution by magnetotelluric survey at high potential zones. The existence potential of Steam-Spot is verified through temperature, pressure, and mineralogical data obtained by the drillings down to about 500 m depth. Social implementation of the research result will contribute to large increase of geothermal power generation by reducing resource-exploration cost.
Links	KOIKE Laboratory Kyoto Univ. [Technology Development of Steam-spot Detection and Sustainable Resource Use for Large Enhancement of Geothermal Power Generation in Indonesia] Institut Teknologi Bandung SATREPS Project JICAODA見える化サイト
Project Updates	(2021/3/8) Research Progress 2020