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Title: Development of hot dry rock technology at Hijiori test site: Program for a long-term circulation test

Abstract

Since 1985, the New Energy and Industrial Technology Development Organization (NEDO) has continued the development of hot dry rock power generation in Hijiori Hot Dry Rock test site, Yamagata prefecture, Japan, as part of the Sunshine Project and succeeding New Sunshine Project sponsored by the Agency of Industrial Science and Technology (AIST), a branch of the Ministry of International Trade and Industry (MITI). The objective of this project is to identify the feasibility of a Hot Dry Rock power generation system in Japan. Thus, the research and development being undertaken at Hijiori HDR test site is aiming to establish hot rock drilling technology, logging borehole technology for evaluating the state of the rock around the well, hydraulic fracturing technology for creating artificial fractures in rock, fracture mapping technology for surveying the reservoir area, and reservoir evaluation technology for predicting reservoir longevity.

Authors:
;  [1];  [2]
  1. New Energy and Industrial Technology Development Organization, Tokyo (Japan). Geothermal Energy Technology Dept.
  2. National Inst. for Resources and Environment (Japan). Mining and Geotechnology Dept.
Publication Date:
OSTI Identifier:
659160
Resource Type:
Journal Article
Resource Relation:
Journal Name: Energy Sources; Journal Volume: 20; Journal Issue: 8; Other Information: PBD: Oct 1998
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; JAPAN; HOT-DRY-ROCK SYSTEMS; TEST FACILITIES; GEOTHERMAL WELLS; WELL DRILLING; RESERVOIR ENGINEERING; WELL LOGGING; HYDRAULIC FRACTURING; SITE CHARACTERIZATION

Citation Formats

Tenma, Norio, Iwakiri, Shunichi, and Matsunaga, Isao. Development of hot dry rock technology at Hijiori test site: Program for a long-term circulation test. United States: N. p., 1998. Web. doi:10.1080/00908319808970095.
Tenma, Norio, Iwakiri, Shunichi, & Matsunaga, Isao. Development of hot dry rock technology at Hijiori test site: Program for a long-term circulation test. United States. doi:10.1080/00908319808970095.
Tenma, Norio, Iwakiri, Shunichi, and Matsunaga, Isao. 1998. "Development of hot dry rock technology at Hijiori test site: Program for a long-term circulation test". United States. doi:10.1080/00908319808970095.
@article{osti_659160,
title = {Development of hot dry rock technology at Hijiori test site: Program for a long-term circulation test},
author = {Tenma, Norio and Iwakiri, Shunichi and Matsunaga, Isao},
abstractNote = {Since 1985, the New Energy and Industrial Technology Development Organization (NEDO) has continued the development of hot dry rock power generation in Hijiori Hot Dry Rock test site, Yamagata prefecture, Japan, as part of the Sunshine Project and succeeding New Sunshine Project sponsored by the Agency of Industrial Science and Technology (AIST), a branch of the Ministry of International Trade and Industry (MITI). The objective of this project is to identify the feasibility of a Hot Dry Rock power generation system in Japan. Thus, the research and development being undertaken at Hijiori HDR test site is aiming to establish hot rock drilling technology, logging borehole technology for evaluating the state of the rock around the well, hydraulic fracturing technology for creating artificial fractures in rock, fracture mapping technology for surveying the reservoir area, and reservoir evaluation technology for predicting reservoir longevity.},
doi = {10.1080/00908319808970095},
journal = {Energy Sources},
number = 8,
volume = 20,
place = {United States},
year = 1998,
month =
}
  • In 1995, a one-month circulation test (Exp.9501) was carried out with HDR-1 as an injection well and HDR-2 and HDR-3 as production wells at the Hijiori HDR site in Yamagata prefecture, Japan. There are two reservoirs in a high temperature granite at the site. Exp.9501 was the first circulation test to evaluate characteristics of the deeper reservoir at about 2200 m deep and was a preliminary test for the subsequent two-years circulation test. The interference between the two reservoirs was observed because of water level changes in production wells. This observation was simulated by using a wellbore heat transfer (WBHT)more » code and concluded that this could occur when downhole pressure changed by heating up of the wellbore. Geochemistry of the produced fluid support this conclusion.« less
  • In 1995, a one-month circulation test (Exp.9501) was carried out with HDR-1 as an injection well and HDR-2 and HDR-3 as production wells at the Hijiori HDR site in Yamagata prefecture, Japan. There are two reservoirs in a high temperature granite at the site. Exp.9501 was the first circulation test to evaluate characteristics of the deeper reservoir at about 2200 m deep and was a preliminary test for the subsequent two-years circulation test. The interference between the two reservoirs was observed because of water level changes in production wells. This observation was simulated by using a wellbore heat transfer (more » WBHT) code and concluded that this could occur when downhole pressure changed by heating up of the wellbore. Geochemistry of the produced fluid support this conclusion.« less
  • Underground nuclear weapons testing at the Nevada Test Site introduced numerous radionuclides that may be used to characterize subsurface hydrologic transport processes in arid climates. A sixteen year pumping experiment designed to examine radionuclide migration away from the CAMBRIC nuclear test, conducted in groundwater beneath Frenchman Flat in 1965, gave rise to an unintended second experiment involving radionuclide infiltration through the vadose zone, as induced by seepage of pumping effluents beneath an unlined discharge trench. The combined experiments have been reanalyzed using a detailed, three-dimensional numerical model of transient, variably saturated flow and mass transport, tailored specifically for large scalemore » and efficient calculations. Simulations have been used to estimate radionuclide travel and residence times in various parts of the system for comparison with observations in wells. Model predictions of mass transport were able to clearly demonstrate radionuclide recycling behavior between the ditch and pumping well previously suggested by isotopic age dating information; match travel time estimates for radionuclides moving between the ditch, the water table, and monitoring wells; and provide more realistic ways in which to interpret the pumping well elution curves. Collectively, the results illustrate the utility of integrating detailed numerical modeling with diverse observational data in developing accurate interpretations and forecasts of contaminant migration processes.« less
  • No abstract prepared.
  • As shown in Table 1, four wells have been used for circulation tests at Hijiori. The diameters of all the open-hole sections of the wells are 8-{1/2} inches. SKG-2 is an injection well. An 1800 m deep reservoir was stimulated hydraulically by water injection into the open-hole section of SKG-2 in 1986. HDR-1 is also an injection well. A 2200 m deep reservoir was stimulated by water injection into the open-hole section of HDR-1 in 1992. HDR-2a and HDR-3 are used to produce steam and hot water from both reservoirs. The subsurface system was created In granodiorite basement rock withmore » temperatures of 250 {degrees}C at a depth of 2,500 m and 270{degrees} C at depth of 2,700 m.« less