Experimental Approach to Hydrothermally Derived Fracturing of Granitic Rock for Enhanced Geothermal Reservoir Systems

N. Hirano, A. Minakawa, G. Bignall, N. Yamasaki, N. Tsuchiya, K. Nakatsuka

Research output: Contribution to journalConference article

9 Citations (Scopus)

Abstract

The fracturing of granite and single crystal quartz at sub- and supercritical hydrothermal conditions was investigated in order to advance the utilisation of Enhanced Geothermal (reservoir) Systems (EGS). No changes (i.e. fracturing) were observed at "dry" conditions, for both granite and single crystal quartz (at any temperature-pressure conditions), but fracturing was recognized in "wet" conditions. In our experiments, fracturing was accelerated in the presence of water, and we propose optimal conditions for Hydrothermally-Derived Fracturing (HDF) of granite. Hydrothermally-Derived Fracturing (HDF) can be utilized for future development of Enhanced Geothermal (reservoir) Systems (EGS), by which fluid flow pass and heat exchange in the deep-seated hydrothermal reservoir is drastically enhanced by utilizing HDF.

Original languageEnglish
Pages (from-to)285-288
Number of pages4
JournalTransactions - Geothermal Resources Council
Publication statusPublished - 2002 Dec 1
EventGeothermal Resources Council: 2002 Annual Meeting - Reno, NV, United States
Duration: 2002 Sep 222002 Sep 25

Keywords

  • Enhanced Geothermal System (EGS)
  • Fracture
  • Granite
  • Hydrothermally-Derived Fracturing (HDF)
  • Quartz
  • Supercritical water

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

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