A study on dynamics of cracks in three dimensions for estimating reservoir cracks in EGS

Kazuo Hayashi, Shinya Onodera

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

Abstract

Preliminary results are presented for analyzing dynamics of genuine 3D reservoir cracks, emphasizing the role of an approach that assumes axisymmetric deformation of an axisymmetric crack, in characterization of reservoir cracks by active acoustic method. Fluid-filled penny shaped and elliptical cracks are employed and the dynamics of the cracks are analyzed by using BIEM (Boundary Integral Equation Method) defined in the Laplace space. It is revealed that the axisymmetric modes of oscillation are predominant and, thus, axisymmetric approach is likely to provide a fairly good approximation in the characterization. On contrary to this, an approach based on 2D crack model is found to be a very poor approximation and may result in a gross misunderstanding of the subsurface settings.

Original languageEnglish
Title of host publicationGeothermal Resources Council Transactions - GRC 2006 Annual Meeting
Subtitle of host publicationGeothermal Resources-Securing Our Energy Future
Pages337-340
Number of pages4
Volume30 I
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

Other

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

Keywords

  • Characterization
  • ECS
  • Fracture
  • HDR
  • HWR

ASJC Scopus subject areas

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

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