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2005 Fiscal Year Final Research Report Summary

Development of measurement method for high permeable fracture system by the multiplet-clustering analysis.

Research Project

Project/Area Number 16560710
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Earth system and resources enginnering
Research InstitutionTohoku University

Principal Investigator

MORIYA Hirokazu  Tohoku University, Graduate School of Engineering, Lecturer, 大学院・工学研究科, 講師 (60261591)

Co-Investigator(Kenkyū-buntansha) NIITSUMA Hiroaki  Tohoku University, Graduate School of Environmental Studies, Professor, 大学院・環境科学研究科, 教授 (90108473)
ASANUMA Hiroshi  Tohoku University, Graduate School of Environmental Studies, Associate Professor, 大学院・環境科学研究科, 助教授 (50250717)
Project Period (FY) 2004 – 2005
KeywordsAE / Microearthquakes / Geothermal / Fracture / Permeability / Multiplet / Fault / Shear slip
Research Abstract

In this research, we have examined the parameters for estimation of high permeable fracture by using induced AE multiplet, where the field data were analyzed and model experiment using granite rock specimen was also carried out in order to study the relation between the induced AE events and the permeable fractures. The relationships among AE occurrence, shear slip, flow rate and pressure in fracture has been investigated through the model experiments, where the shear slip was artificially induced using split rock specimen under the parameter controlled high stiffness system. On the other hand, the induced AE at Coper Basin in Australia and Soultz in France was analyzed and the relationships among the injection pressure, flow rate and AE occurrence were examined. The distribution of the critical pore-pressure for shear slip of fracture has been estimated at Soultz, and the pore-pressure propagation and the formation process of permeable fracture system has been examined. It has been revealed that the permeable fracture system in the reservoir is developed by the linkage of preexisting permeable fractures due to the shear slip of fractures which favorably oriented to the principal stress direction and easily caused shear slip. In addition, it has also been revealed that the pore-pressure spreads in few hundred meters in the reservoir without pressure drop and the pore-pressure exponentially declines as a function of distance from the outlet point in the injection well. On the basis of the above mentioned studies, we have proposed a measurement method for estimation of permeable fractures in reservoir by using the induced AE multiplets.

  • Research Products

    (13 results)

All 2006 2005 2004

All Journal Article (13 results)

  • [Journal Article] Shear-wave splitting detected by using downhole triaxial seismic detector during dilation of artificial subsurface fracture2006

    • Author(s)
      H.Moriya
    • Journal Title

      Geophysical Journal International 164

      Pages: 401-410

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Analysis of fracture propagation behavior using hydraulically induced acoustic emissions in the Bernburg salt mine, Germany2006

    • Author(s)
      H.Moriya
    • Journal Title

      International Journal of Rock Mechanics and Mining Sciences 43

      Pages: 749-576

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Estimation of detailed reservoir structure at Cooper Basin HDR field, Australia, by using microseismic multiplet2005

    • Author(s)
      Y.Kumano
    • Journal Title

      Trans. Geothermal Resources Council 29

      Pages: 93-97

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Multiplet analysis for estimation of critical pore-pressure of fractures inside geothermal reservoir2005

    • Author(s)
      H.Moriya
    • Journal Title

      Proc. World Geothermal Congress 2005 1(CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Estimation of radiation mechanism of AE multiplet observation while hydraulic fracturing in HDR reservoir2005

    • Author(s)
      Y.Kumano
    • Journal Title

      Proc. World Geothermal Congrees 2005 1(CD-ROM)

      Pages: 2005

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Microseismicity and permeability enhancement of hydro-geologic structures during massive fluid injection into granite at 3km depth at the Soultz HDR site2005

    • Author(s)
      K.Evans
    • Journal Title

      Geophysical Journal International 160

      Pages: 388-412

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 間隙水圧の圧入にともなうき裂すべり模擬実験装置の開発と誘発すべり実験2005

    • Author(s)
      根本克己
    • Journal Title

      日本地熱学会誌 27

      Pages: 41-51

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Estimation of detailed reservoir structure at Cooper Basin HDR field, Australia, by using microseismic multiplet2005

    • Author(s)
      Y.Kumano
    • Journal Title

      Trans.Geothermal Resources Council 29

      Pages: 93-97

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Multiplet-analysis for estimation of critical pore-pressure of fractures inside geothermal reservoir2005

    • Author(s)
      H.Moriya
    • Journal Title

      Proc.World Geothermal Congress 2005 1(CD-ROM)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Estimation of radiation mechanism of AE multiplet observation while hydraulic fracturing in HDR reservoir2005

    • Author(s)
      Y.Kumano
    • Journal Title

      Proc.World Geothermal Congress 2005 1(CD-ROM)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of experimental apparatus designed for shear slip associated with injection and hydraulically induced slip experiments2005

    • Author(s)
      K.Nemoto
    • Journal Title

      Journal of Geothermal Research Society of Japan 27

      Pages: 41-51

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Hydraulically induced slip due to fluid injection and pore fluid flow associated with the slip2004

    • Author(s)
      K.Nemoto
    • Journal Title

      Trans. Geothermal Resources Council 28

      Pages: 299-302

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Hydraulically induced slip due to fluid injection and pore fluid flow associated with the slip2004

    • Author(s)
      K.Nemoto
    • Journal Title

      Trans.Geothermal Resources Council 28

      Pages: 299-302

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

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Published: 2007-12-13  

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