Estimation of the Characteristics of Geothermal Reservoir Crack Based on Elastic Wave Radiating from the Crack

Kazuo Hayashi, Hitoshi Nishimura, Hiroyuki AbÉ

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Methods are proposed for distinguishing the mode of deformation and for evaluating the size, orientation and location of fluid-filled cracks in the earth's crust which can be potentially used as a reservoir in geothermal heat extraction. The basic concepts of the method are obtained by studying the nature of the elastic waves radiating from the cracks during crack growth. Here, based on the two-dimensional elastodynamic theory, the problem of the dynamic crack growth is analyzed with the aid of integral equations defined in the Laplace or Fourier image space, where the dynamic crack growth is modelled by releasing tractions on the small interval just ahead of the crack tip.

Original languageEnglish
Pages (from-to)159-164
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume52
Issue number473
DOIs
Publication statusPublished - 1986 Jan 1

Keywords

  • Dynamic Crack Growth
  • Dynamic Displacement Field
  • Elastic Wave
  • Fracture
  • Frequency Spectrum
  • Geothermal Reservoir
  • Hot Dry Rock
  • Radiation Pattern

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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