• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Reduced factor of permeability in a geothermal reservoir

Research Project

Project/Area Number 09651032
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 資源開発工学
Research InstitutionScience University of Tokyo

Principal Investigator

MURAMATSU Yoichi  Science University of Tokyo, Faculty of Science and Technology, Associate Professor, 理工学部, 助教授 (70266922)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordspermeability / self-sealing / fluid inclusion / anhydrite / prehnite / microthermometry / cathodoluminescence / fluid-mineal equilibria / ガス分析 / 開口性断裂
Research Abstract

Productivity of a production well at geothermal fields depends on a permeability of a opened fracture where is a path of present geothermal fluid. The purpose of the project is to clarify a possibility of reduce of the fracture permeability by progress of self-sealing due to precipitation of hydrothermal minerals from the present geothermal fluid. The definite studies for Kakkonda geothermal field, Iwate prefecture, are as follows : (1) mineralogical and microthermometric studies of rock materials ejected from a production well (2) microthermometric and sulfur isotopic studies of anhydrite which is a representative hydrothermal mineral in the upflow zone of the field (3) calculation of geothermal fluid - hydrothermal mineral equilibria (4) observation of anhydrite by the use of cathodoluminescence. From these research, it is concluded that the opened fracture is presently sealing by precipitation of prehnite and so on. Moreover, a preliminary examination shows that the cathodeluminescence is a very useful method to determine a specified anhydrite which was precipitated from the recent geothermal fluid of several anhydrite formation stage.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] Sasaki, M., Muramatsu, Y.et al.: "Characterization of a magmatic/meteoric transition zone at the Kakkonda geothermal system, northeast Japan." Proc.9th Int.Symp.Water Rock Interaction, Taupo, New Zealand. 483-486 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sasaki.M., Muramatsu, Y.et al.: "Characterization of a magmatic/meteoric transition zone at the Kakkonda geothermal system, northeast Japan." Proc.9th Int.Symp.Water Rock Interaction, Taupo, New Zealand. 483-486 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sasaki,M., Muramatsu,Y. et al.: "Characterization of a magmatic/meteoric transition zone at the Kakkonda geothermal system, northeast Japan." Proc.9th Int.Symp.Water Rock Interaction Taupo,New Zealand. 483-486 (1998)

    • Related Report
      1998 Annual Research Report

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi