Hydraulically induced slip due to fluid injection and pore fluid flow associated with the slip

Katsumi Nemoto, Hirokazu Moriya, Hiroaki Niitsuma

Research output: Contribution to journalConference articlepeer-review

Abstract

We carried out a series of hydraulically induced slip experiments using granite specimens containing a simulated preexisting fracture with different surface roughness. The objectives of this study are to understand induced slip behavior due to a fluid injection, and fluid flow associated with the slip; and to investigate effects of surface roughness of the fracture on the induced slip and the pore fluid flow. A series of hydraulically induced slip experiments revealed that induced slip increased stepwise after the initiation of the induced shear slip and that pore fluid inflow into the fracture temporally increased associated with the intermittent slip. In addition, the intermittent slip and the fluctuation in fluid flow were restrained with increase in surface roughness. These experimental results imply possible effects of the surface roughness on a mechanism of the multiplets, which represents the microseismic events in which the waveforms are similar to each other and are frequently observed during a hydraulic stimulation.

Original languageEnglish
Pages (from-to)299-302
Number of pages4
JournalTransactions - Geothermal Resources Council
Volume28
Publication statusPublished - 2004 Dec 1
EventGeothermal Energy: The Reliable Renewable - Geothermal Resources Council 2004 Annual Meeting, GRC - Indian Wells, CA, United States
Duration: 2004 Aug 292004 Sep 1

Keywords

  • Hydraulic stimulation
  • Induced shear slip, pore fluid flow
  • Microseismicity
  • Pore fluid injection
  • Preexisting fracture
  • Surface roughness
  • Triaxial apparatus

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

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