Application of dynamic response of a penny-shaped fluid-filled subsurface crack to fracture characterization in Higashi-Hachimantai field

Shin Ito, Kazuo Hayashi, Hiroyuki Saito, Hiroshi Asanuma, Hiroaki Niitsuma

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

In order to characterize a geothermal reservoir crack, dynamic response of a reservoir crack with fluid leakage along the crack periphery is studied by using a penny-shaped fluid-filled crack in an elastic medium, i.e. a rock mass. Fracture characterization method is derived from dynamic response of the crack. Peak frequencies derived from our crack model are a function of crack radius, aperture, and so on. We characterize reservoir crack by finding a combination of these parameters which minimize the difference between observed peak frequencies in the real field and calculated peak frequencies. Using this characterization method, we could characterize reservoir crack in Higashi-Hachimantai field. Crack radius is around 40 m and aperture is less than 1 mm. These results well accord with those estimated from the field experiments based on different discipline.

Original languageEnglish
Pages (from-to)1460-1465
Number of pages6
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume68
Issue number10
DOIs
Publication statusPublished - 2002 Oct

Keywords

  • Dynamic Response
  • Elastic Wave
  • Elasticity
  • Geothermal Energy
  • Geothermal Reservoir Crack
  • Inverse Problem
  • Stress Wave

ASJC Scopus subject areas

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

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