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2004 Fiscal Year Final Research Report Summary

Formation of Superaitical Geothermal Resevoirs by Means of Supercritical Water-Induced Cracking

Research Project

Project/Area Number 14205149
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 資源開発工学
Research InstitutionTohoku University

Principal Investigator

HASHIDA Toshiyuki  Tohoku University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (40180814)

Co-Investigator(Kenkyū-buntansha) HAYASHI Kazuo  Tohoku University, Institute of Fluid Science, Professor, 流体科学研究所, 教授 (30111256)
TSUCHIDA Noriyuki  Tohoku University, Graduate School of Environmental Studies, Professor, 大学院・環境科学研究科, 教授 (40207410)
NIIBORI Yuichi  Tohoku University, Graduate School of Engineering, Assistant Professor, 大学院・工学研究科, 助教授 (90180562)
TAKAHASHI Toru  Tohoku University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (50323051)
Project Period (FY) 2002 – 2004
KeywordsGeothermal Energy / Supercritical Water / Rock-Water Interactions / Artificial Reservoirs / Supercritical Water-Induced Cracking / Stress Corrosion Cracking / Fracture Mechanism / Thermal Extraction
Research Abstract

The research project determined the feasibility of utilizing the interactions between supercritical water and rock-forming minerals in the creation of an artificial subsurface geothermal reservoir in a deep-seated rock mass, in which temperature and pressure conditions exceed the critical point for water. The main results obtained in this study are summarized below.
1.Application of confining pressures in high temperature testing was shown tot be effective in order to mitigate the thermal stress induced micro-cracking due to thermal expansion mismatch of the rock-forming minerals by conducting ultrasonic wave velocity measurements.
2.Permeability measurements were made for several types of granitic rocks using thick-walled cylindrical specimens. The rock specimens included cores taken from the deep-seated high temperature rock mass at an actual geothermal field site. It has been shown that the permeability measured jumped significantly when the condition of water exceeded the critical po … More int for water regardless of the rock types used in this study. The significant increase in permeability was shown to be due to grain-scale microcracking induced from the interaction between the supercritical water and rock-forming minerals. The extent of the permeability increase was less for the rock specimens taken from the deep-seated rock masses than that for the rock types obtained from outcrops.
3.Tri-axial compression tests were conducted in order to examine the effect of stress on the above-mentioned supercritical water induced cracking phenomenon. It has been demonstrated that the microcrack density at the vicinity of the final fracture plane was signifcantly larger than that at the far-field when the temperature was greater than the critical temperature. The increase in the microcrack density points out that the supercritical water induced cracking was accelerated by the effect of stress. The accelerated cracking is newty named as supercritical water enhanced stress corrosion cracking. The experimental observation may suggest the potential use of the supercritical water enhanced stress corrosion cracking the expansion of hydraulically-induced geothermal reservoirs.
4.We undertook long-term thermal extraction numerical modeling analysis, for a supercritical rock mass, which incorporated fluid flow characteristics (i. e. circulating water) and thermal transfer in the surrounding rock mass. We considered the effects of temperacure and pressure in the supercritical fluid regime, as well as fluid density, viscosity etc. Based on the numerical results, it has been shown that there is an optimum injection rate to extract the heat energy from the supercritical reservoir combined with subcritical temperacure rock mass. Less

  • Research Products

    (26 results)

All 2005 2004 2003 2002

All Journal Article (26 results)

  • [Journal Article] A borehole temperature during drilling in a fractured rock formation2005

    • Author(s)
      S.Fomin, T.Hashida, V.Chugunov, A.V.Kuznetsov
    • Journal Title

      Int.J.of Heat and Mass Transfer 48

      Pages: 385-394

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A borehole temperature during drilling in a fractured rock formation2005

    • Author(s)
      S.Fomin, T.Hashida, V.Chugunov, A.V.Kuznetsov
    • Journal Title

      Int.J.of Heat and Mass Transfer Vol.48

      Pages: 385-394

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High-Pressure Hydraulic Stimulation of Geothermal Reservoir2004

    • Author(s)
      Sergei Fomin, Toshiyuki Hashida, Vladimir Chugunov
    • Journal Title

      Proc.of IMECE04 2004 ASME Int.Mech.Eng.Congress and Exposition,(November 13-20, 2004, Anaheim) (CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] High-Pressure Hydraulic Stimulation of Geothermal Reservoir2004

    • Author(s)
      Sergei Fomin, Toshiyuki Hashida, Vladimir Chugunov
    • Journal Title

      Proc.of IMECE04 2004 ASME Int.Mech.Eng.Congress and Exposition, (November 13-20, 2004, Anaheim) (CD ROM.)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Permeability Enhancement by Microfracturing in Granite under Supercritical Water Conditions2003

    • Author(s)
      T.Takahashi, K.Tanifuji, C.Stafford, T.Hashida
    • Journal Title

      JSME International Journal, Series A 46(1)

      Pages: 24-29

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Numerical Model for the Fracture Type Geothermal Reservoir with the Multi-Borehole System2003

    • Author(s)
      S.Fomin, K.Yoshida, T.Hashida
    • Journal Title

      Proc.of The 6^<th> ASME-JSME Thermal Eng.Joint Conf (CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Heat Flow rate at a Bore-face and Temperature in the Multi-layer Media surrounding a borehole2003

    • Author(s)
      V.Chugunov, S.Fomin, T.Hashida
    • Journal Title

      Int.J.of heat and Mass Transfer 46

      Pages: 4769-4778

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Fractal Concept in Numnerical Simulation of Hydraulic Fracturing of the Hot Dry Rock Geothermal Reservoir2003

    • Author(s)
      S.Fomin, T.Hashida, A.Shimizu, K.Matsuki, K.Sakaguchi
    • Journal Title

      Hydrological Processes 17

      Pages: 2975-2989

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Analytical Modelling of the Formation Temperature Stabilization During the Borehole Shut-in Period2003

    • Author(s)
      S.Fomin, V.Chugunov, T.Hashida
    • Journal Title

      Geophys.J.Int. 155

      Pages: 469-478

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The Effect of Thermal, Chemical, Hydrogical, and Mechanical factors on Water/Rack Interaction in HDR Geothermal Systems2003

    • Author(s)
      S.Fomin, Z.Jing, T.Hashida
    • Journal Title

      Proc.of Int.Conf.on Coupled T-H-M-C Processes in Geo-systems, 13-15 October 2003, Stockholm

      Pages: 647-652

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Supercritical Water/Rock Interactions and Generation of Artificial Geothermal Reservoirs in Deep-Seated High Temperature Rock Masses2003

    • Author(s)
      Toshiyuki Hashida, Toru Takahashi
    • Journal Title

      Proc.of Int.Conf.on Coupled T-H-M-C Processes in Geo-systems, 13-15 October 2003, Stockholm

      Pages: 659-664

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Microcrack Formation and Fracture Characteristics in Granite Under Supercritical Water Conditions2003

    • Author(s)
      Toru Takahashi, Toshiyuki Hashida
    • Journal Title

      Proc.of Int.Conf.on Coupled T-H-M-C Processes in Geo-systems, 13-15 October 2003, Stockholm

      Pages: 683-688

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Numerical Simulation of the Large-Scale Geothermal Reservoir With Multiple-Borehole-Circulation System2003

    • Author(s)
      K.Yoshida, S.Fomin, T.Hashida
    • Journal Title

      Geothermal Resources Council Transactions 27

      Pages: 747-751

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Permeability Enhancement by Microfracturing in Granite under Supercritical Water Conditions2003

    • Author(s)
      T.Takahashi, K.Tanifuji, C.Stafford, T.Hashida
    • Journal Title

      JSME International Journal, Series A Vol.46, No.1

      Pages: 24-29

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Numerical Model for the Fracture Type Geothermal Reservoir with the Multi-Borehole System2003

    • Author(s)
      S.Fomin, K.Yoshida, T.Hashida
    • Journal Title

      Proc.of The 6^<th> ASME-JSME Thermal Eng.Joint Conf. (CD ROM.)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Heat Flow rate at a Bore-face and Temperature in the Multi-layer Media surrounding a borehole2003

    • Author(s)
      V.Chugunov, S.Fomin, T.Hashida
    • Journal Title

      Int.J.of heat and Mass Transfer Vol.46

      Pages: 4769-4778

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Fractal Concept in Numnerical Simulation of Hydraulic Fracturing of the Hot Dry Rock Geothermal Reservoir2003

    • Author(s)
      S.Fomin, T.Hashida, A.Shimizu, K.Matsuki, K.Sakaguchi
    • Journal Title

      Hydrological Processes Vol.17

      Pages: 2975-2989

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Analytical Modelling of the Formation Temperature Stabilization During the Borehole Shut-in Period2003

    • Author(s)
      S.Fomin, V.Chugunov, T.Hashida
    • Journal Title

      Geophys.J.Int. Vol.155

      Pages: 469-478

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The Effect of Thermal, Chemical, Hydrogical, and Mechanical factors on Water/Rock Interaction in HDR Geothermal Systems2003

    • Author(s)
      S.Fomin, Z.Jing, T.Hashida
    • Journal Title

      Proc.of Int.Conf.on Coupled T-H-M-C Processes in Gee-systems, 13-15 October 2003, Stockholm

      Pages: 647-652

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Numerical Simulation of the Large-Scale Geothermal Reservoir With Multiple-Borehole-Circulation System2003

    • Author(s)
      K.Yoshida, S.Fomin, T.Hashida
    • Journal Title

      Geothermal Resources Council Transactions Vol.27

      Pages: 747-751

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Mathematical Modeling of Convection Heat Transfer in a Geothermal Reservoir of Fractal Geometry2002

    • Author(s)
      S.Fomin, A.Shimizu, T.Hashida
    • Journal Title

      Proc.of the Twelfth Int.Heat Transfer Conf August 18-23, 2002, Grenoble, France (Elsevier SAS)

      Pages: 809-814

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Numerical Simulation of Geothermal Reservoir Formation Induced by Hydraulic Fracturing at Great Depth2002

    • Author(s)
      M.Itaoka, K.Sato, T.Hashida
    • Journal Title

      Geothermal Res.Council Transactions 26

      Pages: 297-302

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Analysis of Thermal Effectiveness of Geothermal Multi-Borehole Circulating System2002

    • Author(s)
      S.Fomin, K.Yoshida, T.Hashida
    • Journal Title

      Geothermal Res.Council Transactions 26

      Pages: 279-283

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Mathematical Modeling of Convection Heat Transfer in a Geothermal Reservoir of Fractal Geometry2002

    • Author(s)
      S.Fomin, A.Shimizu, T.Hashida
    • Journal Title

      Proc.of the Twelfth Int.Heat Transfer Conf., August 15-23, 2002, Grenoble, France (Elsevier SAS)

      Pages: 809-814

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Numerical Simulation of Geothermal Reservoir Formation Induced by Hydraulic Fracturing at Great Depth2002

    • Author(s)
      M.Itaoka, K Sato, T.Hashida
    • Journal Title

      Geothermal Res.Council Transactions Vol.26

      Pages: 297-302

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Analysis of Thermal Effectiveness of Geothermal Multi-Borehole Circulating System2002

    • Author(s)
      S.Fomin, K.Yoshida, T.Hashida
    • Journal Title

      Geothermal Res.Council Transactions Vol.26

      Pages: 279-283

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2006-07-11  

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