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Verification of geothermal exploration technology in fiscal 1991. Development of fracture reservoir exploration (development of exploration with seismic wave) / total evaluation of well boring, logging, borehole test and fracture characteristics; 1991 nendo chinetsutansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (kosei kussaku, kenso, kosei test oyobi danretsu tokusei no sogo hyoka)

Miscellaneous:

Abstract

An effective exploration technology is to be newly developed in order to accurately explore the fault group which controls the fluid flow in the geothermal reservoir. Taking the past progress in study into consideration, the result in fiscal 1991 was reported. A 1705m deep N3-YT-2 wellhole was bored in the Yutsubo area in Hohi geothermal field selected as an experimental site. The geological order of stratification was analyzed a well survey made with physical logging inside the borehole. A water injection test was conducted to grasp the relation between the water permeability and fracture characteristics of the strata around the borehole. In the past reports, assumed was the existence of three fracture systems as a model, i.e., NW-SE trending macro-scale one, E-W trending meso-scale one which accorded in direction with the active fault, and local small-scale one. However, the present borehole did not encounter the main fracture system which formed a presently active hydrothermal passage. Possibly, it might do the small-scale fracture. In the seismic exploration, clear reflection events were confirmed in the boundary between Narukogawa volcanic breccia and Kotobaki lava, and between Hachobaru lava and Pre-Kusu altered volcanic rock, and on the top surface of Hachobaru lava. 8 refs.,  More>>
Publication Date:
Dec 01, 1992
Product Type:
Miscellaneous
Report Number:
ETDE/JP-mf-95730259
Reference Number:
SCA: 150200; 150300; 150904; PA: NEDO-94:820179; EDB-95:020735; SN: 95001310930
Resource Relation:
Other Information: PBD: Dec 1992
Subject:
15 GEOTHERMAL ENERGY; GEOTHERMAL EXPLORATION; WELL DRILLING; GEOPHYSICAL SURVEYS; VERIFICATION; WELL LOGGING; TESTING; SEISMIC SURVEYS; GEOLOGIC FRACTURES; RESERVOIR ROCK; SEISMIC WAVES; FLUID FLOW; HATCHOBARU GEOTHERMAL FIELD; DEPTH 1-3 KM; GEOLOGIC SURVEYS; STRATIGRAPHY; HYDRAULIC CONDUCTIVITY; INJECTION WELLS; GEOLOGIC FAULTS; GEOLOGIC MODELS; HYDROTHERMAL SYSTEMS; BOUNDARY LAYERS; 150200; 150300; 150904; GEOLOGY AND HYDROLOGY OF GEOTHERMAL SYSTEMS; GEOTHERMAL EXPLORATION AND EXPLORATION TECHNOLOGY; GEOTHERMAL RESERVOIR AND WELL PERFORMANCE
OSTI ID:
10108032
Research Organizations:
New Energy and Industrial Technology Development Organization, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE95730259; TRN: 94:820179
Availability:
OSTI; NTIS; Available from New Energy and Industrial Technology Development Organization, 1-1, 3-chome, Higashi-Ikebukuro, Toshima-Ku, Tokyo, Japan
Submitting Site:
NEDO
Size:
222 p.
Announcement Date:
Jun 30, 2005

Miscellaneous:

Citation Formats

None. Verification of geothermal exploration technology in fiscal 1991. Development of fracture reservoir exploration (development of exploration with seismic wave) / total evaluation of well boring, logging, borehole test and fracture characteristics; 1991 nendo chinetsutansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (kosei kussaku, kenso, kosei test oyobi danretsu tokusei no sogo hyoka). Japan: N. p., 1992. Web.
None. Verification of geothermal exploration technology in fiscal 1991. Development of fracture reservoir exploration (development of exploration with seismic wave) / total evaluation of well boring, logging, borehole test and fracture characteristics; 1991 nendo chinetsutansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (kosei kussaku, kenso, kosei test oyobi danretsu tokusei no sogo hyoka). Japan.
None. 1992. "Verification of geothermal exploration technology in fiscal 1991. Development of fracture reservoir exploration (development of exploration with seismic wave) / total evaluation of well boring, logging, borehole test and fracture characteristics; 1991 nendo chinetsutansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (kosei kussaku, kenso, kosei test oyobi danretsu tokusei no sogo hyoka)." Japan.
@misc{etde_10108032,
title = {Verification of geothermal exploration technology in fiscal 1991. Development of fracture reservoir exploration (development of exploration with seismic wave) / total evaluation of well boring, logging, borehole test and fracture characteristics; 1991 nendo chinetsutansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (kosei kussaku, kenso, kosei test oyobi danretsu tokusei no sogo hyoka)}
author = {None}
abstractNote = {An effective exploration technology is to be newly developed in order to accurately explore the fault group which controls the fluid flow in the geothermal reservoir. Taking the past progress in study into consideration, the result in fiscal 1991 was reported. A 1705m deep N3-YT-2 wellhole was bored in the Yutsubo area in Hohi geothermal field selected as an experimental site. The geological order of stratification was analyzed a well survey made with physical logging inside the borehole. A water injection test was conducted to grasp the relation between the water permeability and fracture characteristics of the strata around the borehole. In the past reports, assumed was the existence of three fracture systems as a model, i.e., NW-SE trending macro-scale one, E-W trending meso-scale one which accorded in direction with the active fault, and local small-scale one. However, the present borehole did not encounter the main fracture system which formed a presently active hydrothermal passage. Possibly, it might do the small-scale fracture. In the seismic exploration, clear reflection events were confirmed in the boundary between Narukogawa volcanic breccia and Kotobaki lava, and between Hachobaru lava and Pre-Kusu altered volcanic rock, and on the top surface of Hachobaru lava. 8 refs., 34 figs., 20 tabs.}
place = {Japan}
year = {1992}
month = {Dec}
}