Experimental evaluation of fluid flow through artificial shear fracture in Granite

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Direct shear tests were performed for intact granite samples to prepare specimens containing single shear fractures created under 20, 40, 60 MPa normal stress and 1, 3, 5 mm shear displacement conditions, for flow-through experiments. Shear fractures were successfully created on the constrained fracturing plane. Different normal stress and shear displacement conditions caused different roughness of fracture surfaces. Flow-through experiments were performed for the specimens containing shear fractures under 10-100 MPa confining pressure conditions. In the case of the shear fractures created under 20, 40 MPa normal stress and 1, 5 mm shear displacement conditions, no obvious differences were observed in permeability despite different normal stress and shear displacement conditions. Permeability decreased significantly under low confining pressure conditions (< 40-50 MPa), and then slightly decreased with increasing confining pressure. In the case of the shear fractures created under 60 MPa normal stress and 1, 3, 5 mm shear displacement conditions, on the other hand, permeability differed from the above case. It was observed that permeability decreased drastically under high confining pressure conditions (> 70 MPa). It was also observed that permeability increased clearly with increasing shear displacement condition.

Original languageEnglish
Title of host publicationGeothermal Resources Council Transactions - GRC 2006 Annual Meeting
Subtitle of host publicationGeothermal Resources-Securing Our Energy Future
Pages361-366
Number of pages6
Publication statusPublished - 2006 Dec 1
EventGRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future - San Diego, CA, United States
Duration: 2006 Sep 102006 Sep 13

Publication series

NameTransactions - Geothermal Resources Council
Volume30 I
ISSN (Print)0193-5933

Other

OtherGRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future
Country/TerritoryUnited States
CitySan Diego, CA
Period06/9/1006/9/13

Keywords

  • Coupling
  • Direct shear test
  • EGS
  • Flow
  • Flow-through experiment
  • Fluid flow
  • Fracturing
  • Granite
  • Permeability
  • Shear fracture
  • Stress

ASJC Scopus subject areas

  • Geology
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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