| Characterization of HDR Reservoir by Seismic Signal While Drilling |
Hiroshi Asanuma, Hakusei Liu, Hiroaki Niitsuma and Roy Baria |
Advanced Technologies (HDR, Magma, Geopressure) |
seismic while drilling, reflection method, Soultz HDR Project |
World Geothermal Congress |
2000 |
English |
| Reflection Imaging of HDR Reservoir at Soultz by Means of the AE Reflection Method |
Nobukazu Soma, Hiroaki Niitsuma and Roy Baria |
Advanced Technologies (HDR, Magma, Geopressure) |
geophysical prospecting |
World Geothermal Congress |
2000 |
English |
| Permeable Fractures and In-Situ Stress at the Kakkonda Geothermal Field, Japan |
Osamu Kato, Takashi Okabe, Satoshi Shigehara, Nobuo Doi, Toshiyuki Tosha and Kazuo Koide |
Exploration and Development |
fractures, stress, core, micro-earthquake, oxygen isotopes, Kakkonda geothermal field |
World Geothermal Congress |
2000 |
English |
| Identification of Structures Inside an AE/Microseismic Cloud in a HDR Reservoir and Relocation by a Modified Collapsing Method |
Hiroshi Asanuma, Manabu Ishimoto, Robert Jones and Hiroaki Niitsuma |
Advanced Technologies (HDR, Magma, Geopressure) |
acoustic emission/microseismicity |
World Geothermal Congress |
2000 |
English |
| Natural State Simulation of the Kakkonda Geothermal Field, Japan |
Yukihiro Sakagawa, Kengo Aoyama, Ken Ikeuchi, Masahiro Takahashi, Osamu Kato, Nobuo Doi, Toshiyuki Tosha, Takao Ominato and Kazuo Koide |
Reservoir Evaluation |
geothermal, natural state simulation, Kakkonda field, NEDOís project |
World Geothermal Congress |
2000 |
English |
| Field Observation of Cooling Joint System in the Quaternary Takidani Pluton, Japan |
Shingo Kano, Kenichi Kishi, Kazuya Saito, Chie Shiro, Noriyoshi Tsuchiya and Katsuto Nakatsuka |
Advanced Technologies (HDR, Magma, Geopressure) |
Takidani Granitoid Rocks, Natural Fracture Network, Joint Spacing, Joint Block Size, Cooling Joint System |
World Geothermal Congress |
2000 |
English |
| Effects of Exploitation in the Beppu Hydrothermal Field, Japan |
Yuki Yusa, Shinji Ohsawa and Koichi Kitaoka |
Case Histories |
Beppu Hydrothermal System, exploitation, longterm changes, piezometric head, seawater intrusion, geochemistry, thermal waters |
World Geothermal Congress |
2000 |
English |
| Reevaluation of Reservoir Structure at Ogachi HDR Field by Precise Source Location of AE Multiplet |
Hirokazu Moriya, Hiroaki Niitsuma and Hideshi Kaieda |
Advanced Technologies (HDR, Magma, Geopressure) |
doublet/multiplet,Ogachi HDR field |
World Geothermal Congress |
2000 |
English |
| Study of Microseismic Doublet/Multiplet for Evaluation of Subsurface Fracture System in Soultz HDR Field |
Hirokazu Moriya, Katsuhisa Nakazato, Hiroaki Niitsuma and Roy Baria |
Advanced Technologies (HDR, Magma, Geopressure) |
doublet/multiplet |
World Geothermal Congress |
2000 |
English |
| Time-Dependent Closure and Permeability of a Small-Scale Hydraulic Fracture Under Constant Normal Stress |
Erqi Wang, Kiyotoshi Sakaguchi, Kiyohiko Okumura and Koji Matsuki |
Advanced Technologies (HDR, Magma, Geopressure) |
hydraulic fracture, granite, time-dependent closure, time-dependent permeability, hydraulic aperture, constant normal stress |
World Geothermal Congress |
2000 |
English |
| Monitoring of Geyser Activity in Whakarewarewa, New Zealand |
Yuji Nishi, Tsuneo Ishido, Mituhiko Sugihara, Toshiyuki Tosha, Nobuo Matsushima and Bradley J. Scott |
Exploration and Development |
geothermal, geyser, self-potential, gravity, Whakarewarewa |
World Geothermal Congress |
2000 |
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 |
| A Study of a Technology for Optimizing Design of Micro-Earthquake Monitoring Network Systems in Geothermal Fields |
Satoshi Shigehara, Mineyuki Hanano, Masayuki Tateno, Takashi Kuwano and Shigeyuki Yamazawa |
Exploration and Development |
geothermal |
World Geothermal Congress |
2000 |
English |
| Modeling Studies of Sibayak Geothermal Reservoir, Northern Sumatra, Indonesia |
Jatmiko Prio Atmojo, Ryuichi Itoi, Michihiro Fukuda, Agus Widiyarso, Sayogi Sudarman and T Tanaka |
Case Histories |
Sibayak geothermal field, conceptual model, numerical simulation |
World Geothermal Congress |
2000 |
English |
| Ohaaki Reservoir Chemistry: Insights into the Nature and Location of the Heat Source(s) |
B. W. Christenson, E. K. Mroczek, M. K. Stewart, G. Lyon and B. M. Kennedy |
Exploration and Development |
fluid geochemistry |
World Geothermal Congress |
2000 |
English |
| Stress Measurement Using Rock Core in an HDR Field |
Yasuki Oikawa and Tsutomu Yamaguchi |
Advanced Technologies (HDR, Magma, Geopressure) |
Geothermal, Stress, Core, Dsca, Asr, Hijiori |
World Geothermal Congress |
2000 |
English |
| Heat and Fluid Flow at the Soultz Hot Dry Rock System in the Rhine Graben |
Daniel Pribnow and Christoph Clauser |
Advanced Technologies (HDR, Magma, Geopressure) |
HDR, Rhinegraben, Heatflow, Fluidflow |
World Geothermal Congress |
2000 |
English |
| Sonic Log in a Fluid-Filled Borehole with a Fracture Resulting from Hydraulic Fracturing |
Hiroyuki Saito and Kazuo Hayashi |
Reservoir Evaluation |
HDR, HWR, FWAL, Borehole Stoneley wave, and Fracture aperture |
World Geothermal Congress |
2000 |
English |
| The Influence of Effluent Water Discharged from the N·mafjall Geothermal Field on Local Groundwater |
Steinunn Hauksdottir, Hrefna Kristmannsdottir, Gudni Axelsson, Halldor Armannsson, Helgi Bjarnason and Magnus Olafsson |
Environmental and Social Aspects |
Lake M?vatn, N·mafjall geothermal field, groundwater, tracer test, effluent water |
World Geothermal Congress |
2000 |
English |
| Modeling Studies of the Nesjavellir Geothermal Field, Iceland |
Benedikt Steingrimsson, Gudmundur S Bodvarsson, Einar Gunnlaugsson, Gestur Gislason and Omar Sigurdsson |
Reservoir Evaluation |
Iceland |
World Geothermal Congress |
2000 |
English |