You need JavaScript to view this

Verification of geothermal exploration technology in fiscal 1991. Development of fracture reservoir exploration (development of exploration with seismic wave / development of exploration); 1991 nendo chinetsu tansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (tansaho kaihatsu)

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. Yutsubo geothermal field in Oita Prefecture was selected as an experimental site. In the high-accuracy seismic reflection method with both P-wave and S-wave hypocenters, reflection events which were good in S/N ratio were obtained down to the depth of about 1.5sec in two-way travel time. Discontinuous reflection events judged to be a fracture were discriminated from the S-wave reflection recorded in profile. As a result of seismic wave propagation test, the initial motion of S-wave was clearly observed also by vertical seismic profiling (VSP). The reflection method is sufficiently effective in generally grasping the fracture structure. In a P-wave`s zero offset VSP, the reflected wave from the boundary between lava and tuff was clearly detected with a reflection surface which corresponded well to that recorded in logging. Pursuable as a continuous horizon in the imaging record, the reflection surface can serve as a reliable index to detect the fracture. 80 figs., 4 tabs.
Publication Date:
Dec 01, 1992
Product Type:
Miscellaneous
Report Number:
ETDE/JP-mf-95730258
Reference Number:
SCA: 150200; 150300; 150904; PA: NEDO-94:820178; EDB-95:020736; SN: 95001310929
Resource Relation:
Other Information: PBD: Dec 1992
Subject:
15 GEOTHERMAL ENERGY; GEOTHERMAL EXPLORATION; GEOPHYSICAL SURVEYS; VERIFICATION; GEOLOGIC FRACTURES; RESERVOIR ROCK; FLUID FLOW; HATCHOBARU GEOTHERMAL FIELD; SEISMIC WAVES; SEISMIC P WAVES; SEISMIC S WAVES; REFLECTION; WAVE PROPAGATION; TIME DEPENDENCE; SIGNAL-TO-NOISE RATIO; DEPTH; UNDERGROUND; FORESHOCKS; LAVA; TUFF; BOUNDARY LAYERS; WELL LOGGING; 150200; 150300; 150904; GEOLOGY AND HYDROLOGY OF GEOTHERMAL SYSTEMS; GEOTHERMAL EXPLORATION AND EXPLORATION TECHNOLOGY; GEOTHERMAL RESERVOIR AND WELL PERFORMANCE
OSTI ID:
10108030
Research Organizations:
New Energy and Industrial Technology Development Organization, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE95730258; TRN: 94:820178
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:
180 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 / development of exploration); 1991 nendo chinetsu tansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (tansaho kaihatsu). 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 / development of exploration); 1991 nendo chinetsu tansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (tansaho kaihatsu). Japan.
None. 1992. "Verification of geothermal exploration technology in fiscal 1991. Development of fracture reservoir exploration (development of exploration with seismic wave / development of exploration); 1991 nendo chinetsu tansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (tansaho kaihatsu)." Japan.
@misc{etde_10108030,
title = {Verification of geothermal exploration technology in fiscal 1991. Development of fracture reservoir exploration (development of exploration with seismic wave / development of exploration); 1991 nendo chinetsu tansa gijutsunado kensho chosa hokokusho yoyaku. Danretsugata choryuso tansaho kaihatsu danseiha riyo tansaho kaihatsu (tansaho kaihatsu)}
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. Yutsubo geothermal field in Oita Prefecture was selected as an experimental site. In the high-accuracy seismic reflection method with both P-wave and S-wave hypocenters, reflection events which were good in S/N ratio were obtained down to the depth of about 1.5sec in two-way travel time. Discontinuous reflection events judged to be a fracture were discriminated from the S-wave reflection recorded in profile. As a result of seismic wave propagation test, the initial motion of S-wave was clearly observed also by vertical seismic profiling (VSP). The reflection method is sufficiently effective in generally grasping the fracture structure. In a P-wave`s zero offset VSP, the reflected wave from the boundary between lava and tuff was clearly detected with a reflection surface which corresponded well to that recorded in logging. Pursuable as a continuous horizon in the imaging record, the reflection surface can serve as a reliable index to detect the fracture. 80 figs., 4 tabs.}
place = {Japan}
year = {1992}
month = {Dec}
}