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Development of a Fractured Geothermal Reservoir Simulator in terms of Mechanical and Chemical Water/Rock Interactions.

Research Project

Project/Area Number 07555325
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field 資源開発工学
Research InstitutionTohoku University

Principal Investigator

HASHIDA Toshiyuki (1996)  Tohoku Univ., Faculty of Eng., Ass.Prof., 工学部, 助教授 (40180814)

ウィリ-リチャード ジョナサン (1995)  東北大学, 工学部, 助教授 (90261594)

Co-Investigator(Kenkyū-buntansha) HANANO Mineyuki  Geo-E,Dep.of Inquiry, Res.Fellow, 探査部, 研究員
KITANO Koichi  CRIEPI,Dep.of Geology, Chief Res.Fellow, 地質岩盤部, 主任研究員
WATANABE Kimio  Tohoku Univ., Faculty of Eng., Res.Assistant, 工学部, 助手 (00270819)
橋田 俊之  東北大学, 工学部, 助教授 (40180814)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥10,300,000 (Direct Cost: ¥10,300,000)
Fiscal Year 1996: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1995: ¥6,700,000 (Direct Cost: ¥6,700,000)
KeywordsGeothermal / Hot Dry Rock / Hot Wet Rock / Reservoir / Subsurface Fractures / Numerical Simulation / Energy / マルチクラック / 水圧破砕 / 岩石熱水反応 / き裂
Research Abstract

Hot Dry Rock (HDR)/Hot Wet Rock (HWR) geothermal energy extraction systems, which attract a great deal of attention as one of new technologies to obtain energy, are designed to utilize natural and artificial subsurface fractures for the heat exchange between water and hot rock. Numerical analysis of water flow and heat transfer in fractured geothermal reservoir is strongly needed to estimate the heat mining performance of these systems.
In this study, first of all, HDR/HWR geothermal reservoirs were characterized by fracture network based on fractal geometry which is getting popular to assess subsurface fractures. By using fracture network geothermal reservoir model, the mithodology to analyze water flow and heat transfer in reservoirs has been established. The changes of fracture apertures has significant influence on fluid flow, and it is important to estimate fracture behavior during water circulation. The mechanical and chemical interaction between water and rock was included into the program. Share dilation of each fracture caused by water pressure was calculated based on rock mechanics theory. Rock dissolution and precipitation experiments in high pressure and temperatures have been performed. Water/Rock interaction rate was obtained as a function of temperature and surface water velocity.
Short-term water circulation test was conducted at Ogachi field, one of HDR/HWR test sites in Japan. The profile of production temperature was analyzed by the program developed in this study, and the results has shown good agreement with the actual data. Furthermore this analysis could give a stochastic estimation of long-term performance of Ogachi reservoir.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] 高橋秀明,渡辺公雄: "岩石破壊力学からフラクタル破壊力学へ" 材料. 45. 705-710 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] J.Willis-Richards,K.Watanabe and H.Takahashi: "Progress towards A Stochastic Rock Mechanics Model of Engineered Geothermal Systems." Journal of Geophysical Research. 101,B8. 17481-17496 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Z.Jing,J.Willis-Richards,K.Watanabe and T.Hashida: "The Effect of Water/Rock Interaction on the Permeability of HDR Geothermal Reservoir." Proc.of the 2nd Int.Conference on Solvothermal Reactions. 2. 169-172 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Watanabe,N.Chigira,J.Willis-Richards and T.Hashida: "Analysis of Long-term Performance of Hot Dry Rock Geothermal Energy Extraction Systems based on Fractal Fracture Network Model." Geothermal Science and Technology. (予定).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Watanabe and H.Takahashi: "Crack Systems in Rocks(一部分担、編集:Prof.P.Meredith,UCL,London)" Gordon and Breach Science Publishers Ltd.,London.(予定),

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Takahashi and K.Watanabe: "From Rock Fracture Mechanics to Fractal Fracture Mechanics." Journal of the Society of Materials science Japan (Japanese). Vol.45. 705-710 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] J.Willis-Richards, K.Watanabe and H.Takahashi: "Progress towards A Stochastic Rock Mechanics Model of Engineered Geothermal Systems." Journal of Geophysical Research. Vol.101. 17481-17496 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Z.Jing, J.Willis-Richards, K.Watanabe and T.Hashida: "The Effect of Water/Rock Interaction on the Permeability of HDR Geothermal Reservoir." Proc.of the 2nd International Conference on Solvothermal Reactions. Vol.2. 169-172 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Watanabe, N.Chigira, J.Willis-Richards and T.Hashida: "Analysis of Long-term Performance of Hot Dry Rock Geothermal Energy Extraction Systems based on Fractal Fracture Network Model." Geothermal Science and Technology. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Watanabe and H.Takahashi: Crack Systems in Rocks, (One part, Editor : Prof.P.Meredith, UCL,London). Gordon and Breach Science Publishers Ltd., London, UK,(in press),

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 高橋秀明、渡辺公雄: "岩石破壊力学からフラクタル破壊力学へ" 材料. 45. 705-710 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] J.Willis-Richards, K.Watanabe and H.Takahashi: "Progress towards A Stochastic Rock Mechanics Model of Engineered Geothermal Systems" journal of Geophysical Research. 101・B8. 17481-17496 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Z.Jing, J.Willis-Richards, K.Watanabe and T.Hashida: "The Effect of Water-Rock Interaction on the Permeability of HDR Geothermal Reservoir" Proceedings of the 2nd Internatoinal Conference on Solvothermal Reactions. 2. 169-172 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Watanabe, N.Chigira, J.Willis-Richards and T.Hashida: "Analysis of Long-term Performance of Hot Dry Rock Geothermal Energy Extraction Systems Based on Fractal Fracture Network Model" Geothermal Science and Technology. (予定).

    • Related Report
      1996 Annual Research Report
  • [Publications] K.Watanabe and H.Takahashi: "Crack Systems in Rocks(一部分担、編集Prof.P.Meredith)" Gordon and Breach Science Publishers Ltd., London(予定),

    • Related Report
      1996 Annual Research Report
  • [Publications] Kimio Watanabe: "Parametric Study of the Energy Extraction from Hot Dry Rock based on Fractal Fracture Network Model" Geothermics. 24. 223-236 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Jonathan Willis-Richards: "Progress towards a Stochastic Rock Mechanics Model of Engineered Geothermal Systems" Journal of Geophysical Research. (未定). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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