| Subsurface Structure in Oita Hot Spring Area Inferred from Gravity Data, Eastern Kyushu, Japan |
Takashi ZAIZEN, Yasuhiro FUJIMITSU, Jun NISHIJIMA |
Geophysics |
Low-temperature hydrothermal system, hot springs, gravity, Oita |
Stanford Geothermal Workshop |
2017 |
English |
| Development of Metal-Seal Packer to Estimate In-Situ Fracture Aperture |
Takashi Takehara, Tsutomu Yamaguchi, Takashi Narita and Yoshiaki Mizuta |
Advanced Technologies (HDR, Magma, Geopressure) |
Hot Dry Rock, hydraulic fracturing, fracture aperture, Dual Single-Packer, Rubber-Seal Packer, Metal-Seal Packer |
World Geothermal Congress |
2000 |
English |
| Current Status of Technology Development for Geothermal Reservoir Evaluation and Management |
Takashi OKABE, Tatsuya SATO, Kazumi OSATO, Kazuhiro SAEKI, Keiichi SAKAGUCHI, Kenji FUJIMOTO, Tadaaki SHIMADA, Toshiyuki TOSHA |
Field Management |
EGS, R&D, JOGMEC, Water recharge, Recharge well, Superheated reservoir, Simulation, TOUGH2, MINC model, Yanaizu-Nishiyama, Okuaizu, Fukushima |
World Geothermal Congress |
2015 |
English |
| Control System for Drilling Geothermal Wells at High Angles of Deviation in National Parks |
Takashi Okabe, Satoshi Nakashima, Satoshi Ujyo, Makoto Saito, Kuniaki Shimada, Yuichi Sato and Shigemi Naganawa |
— |
highly deviated well, control drilling, national park, cost reduction, R&D, Ministry of the Environment |
New Zealand Geothermal Workshop |
2013 |
English |
| Estimation of Stress Field by Using Drilling-Induced Tensile Fractures Observed at Well Tg-2 and a Study of Critically Stressed Shear Fractures Based on T |
Takashi Okabe and Kazuo Hayashi |
Exploration and Development |
Stress field, drilling-induced tensile fracture, BHTV/FMI, inversion, TG-2, critically stressed shear fractures |
World Geothermal Congress |
2000 |
English |
| Combination of Axial Exhaust Turbine and Direct Contact Condenser - Maibarara Geothermal Power Plant |
Takashi MURAKAMI, Shigeto YAMADA |
Power Generation |
axial exhaust, direct contact condenser |
World Geothermal Congress |
2015 |
English |
| An Update on Mepas, a Software Package for Reservoir Mass and Heat Flow Characterization in Geothermal Reservoirs Using Micro-Earthquake Data |
Takashi Kuwano, Mineyuki Hanano, Masayuki Tateno, Satoshi Shigehara and Tomonori Ide |
Software for Geothermal Applications |
microearthquake |
World Geothermal Congress |
2000 |
English |
| Long-term Operation Management of a Hybrid Ground Source Heat Pump System Combined with a Cooling Tower by Using an Autonomic Optimum Control System in Cooling-dominant Region |
Takao KATSURA, Yasushi NAKAMURA, Yoshitaka SAKATA, Katsunori NAGANO |
Geothermal Heat Pumps |
Hybrid ground source heat pump system, long-term operation management, autonomic optimum control system |
World Geothermal Congress |
2020 |
English |
| Rock Fracture Mechanics for Design and Control of Geothermal Reservoir |
Takanohashi, H., Niitsuma, H. and Takahashi, H. |
Hydraulic Fracturing and Drilling |
— |
Japan International Geothermal Symposium |
1988 |
English |
| Development of Geothermal Technologies Between 1980 and 2002 in Nedo, Japan |
Takamasa Horikoshi, Koichi Tagomori, Tsuneo Kikuchi and Toshiyuki Tosha |
Research, Development and New Technologies |
— |
PNOC-EDC Geothermal Conference |
2003 |
English |
| Electrical Resistivity Structure and Its Changes at the Ogiri Geothermal Field, Japan |
Takakura, Shinichi; Takahashi, Takeharu; Yokoi, Koichi; Tosha, Toshiyuki; Horikoshi, Takamasa; Sasaki, Yutaka |
Geophysical surveys |
Geophysics; Electrical Survey; Resistivity Structure; Monitoring; Ogiri Geothermal Field |
Geothermal Resources Council Transactions |
2001 |
English |
| Laboratory Experiment of Tracer Test in the Vertical Two-Dimensional Porous Media with Newly Developed Tracer Sensors |
Takaki, Masahiro; Itoi, Ryuichi; Tanaka, Toshiaki; Maruo, Takumi |
Well testing; Tracer testing; Equipment design; Faults |
Tracer test; vertical two-dimensional porous medium; tracer concentration sensor; fault system; absorption spectrophotometry |
Geothermal Resources Council Transactions |
2013 |
English |
| Estimation of Deep Reservoir Temperature Distribution Using Stochastic Method in the Uenotai Geothermal Field |
Takahiro Shiga, Masatake Sato, Tatsuya Sato, Takashi Okabe, Kazumi Osato, Yoshtnobu Takahashi, Tsuneshi Inoue, Stephen P. White & Kazuo Koide |
Reservoir Engineering (Modeling) |
— |
New Zealand Geothermal Workshop |
2000 |
English |
| Field Test of Ungrouted Ground Heat Exchangers with In-Hole Vertical Ground Water Flow |
Takahiro MAEHARA, Hikari FUJII, Seiichiro IOKA, Atsushi WATABE |
Direct Use |
Ground source heat pump system |
Stanford Geothermal Workshop |
2013 |
English |
| Arsenic in Geothermal Water and Silica Scale |
Takahashi, Y., Yokoyama, T. and Tarutani, T. |
Geochemistry |
— |
New Zealand Geothermal Workshop |
1987 |
English |
| The Hawaii Geothermal Applications Program |
Takahashi, Patrick; Seki, Arthur; Chen, Bill |
Operations management; Direct use; Economics; Financing |
Direct Use; Research Agencies; USA; Hawaii; Puna; Universities |
Geothermal Resources Council Transactions |
1985 |
English |
| Micro-Earthquake Monitoring and Tri-Axial Drill-Bit VSP in NEDO "Deep-Seated Geothermal Reservoir Survey" in Kakkonda, Japan |
Takahashi, Masaki; Tateno, Masayuki; Kondo, Tayuki; Suzuki, Iwao; Shigehara, Satoshi; Yagi, Masahiko; Muraoka, Hirofumi; Niitsuma, Hiroaki |
Microseismicity; Exploration; Geophysical surveys; Vertical |
Exploration; Hypocenters; Drill Bits; Fracture Distribution; Geological; Earthquakes; Seismicity; Reflectors |
Geothermal Resources Council Transactions |
1995 |
English |
| Fundamental Study of Flash Fracturing in High Temperatures Controlled by Depressure Rate |
Takagi, Kenta; Hirano, Nobuo; Tsuchiya, Noriyochi |
— |
— |
Geothermal Resources Council Transactions |
2017 |
English |
| Investigations on Hydrothermal Activities Using Fluid Inclusion Geothermometry in the Otake and Hatchobaru Geothermal Fields |
Takagi, H., Fujino, T., Kurokawa, K., |
Geology and Geochemistry |
— |
Japan International Geothermal Symposium |
1988 |
English |
| Pressure Distribution in Geothermal Wells Producing Low Amounts of Gas |
Takacs, Gabor; Bobok, Elemer; Turzo, Zoltan |
Fluid dynamics; Two phase flow |
Production Technology; Flow Rates; Piping System; Two Phase; Production Monitoring |
Geothermal Resources Council Transactions |
1998 |
English |