Stability of a Geothermal Reservoir Connecting with a Horizontal Natural Fracture in the Earth's Crust

Kazuo Hayashi, Toshihiko Sayama, Hiroyuki Abe

Research output: Contribution to journalArticle

Abstract

The behavior of a geothermal reservoir connecting with a horizontal natural fracture in the earth's crust is analyzed on the basis of liner elastic fracture mechanics. Noting crack reinitiation from preexisting micro craks of a natural fracture, the influence of various factors on the behavior of the reservoir is investigated, and then the stability of the reservoir is discussed. It is revealed that the main factor governing the mechanical behavior of the reservoir is the discontinuity of tectonic stress and fracture toughness across the natural fracture. It is also shown that the reservoir is always stable and can be relatively larger than a vertical reservoir in a continuous rock mass, when the horizontal compressive stress in the region over the fracture is larger than that in the region beneath the fracture.

Original languageEnglish
Pages (from-to)151-158
Number of pages8
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume52
Issue number473
DOIs
Publication statusPublished - 1986 Jan 1

Keywords

  • Fracture
  • Fracture Toughness Discontinuity
  • Geothermal Energy Extraction
  • Hot Dry Rock
  • Natural Fracture
  • Stability of Geothermal Reservoir
  • Tectonic Stress Discontinuity

ASJC Scopus subject areas

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

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