The distinct element analysis for hydraulic fracturing considering the fluid viscosity

H. Shimizu, S. Murata, T. Ishida

Research output: Contribution to conferencePaperpeer-review

6 Citations (Scopus)

Abstract

The flow-coupled DEM simulations are performed to better understand the hydraulic fracturing mechanism and the influence of fluid viscosity. The simulation results were in good agreement with the actual experimental results which containing the AE measurement data. As the results, the followings were found. When the low viscous fluid is used, the fluid is infiltrated into the fracture instantaneously. On the other hand, when the highly viscous fluid is used, the fluid is infiltrated slowly into the crack after the fracture elongates first. Although the tensile cracks are dominantly generated in the simulation, the energy released from a tensile crack becomes small because the tensile strength of rock is obviously small compared with the compressive strength. Such a small AE is easily buried in a noise and hard to be measured in an experiment. Therefore, in AE measurement experiment, shear type AE with large energy is dominantly observed, as many previous researches have indicated.

Original languageEnglish
Publication statusPublished - 2009 Nov 27
Event43rd U.S. Rock Mechanics Symposium and 4th U.S.-Canada Rock Mechanics Symposium - Asheville, NC, United States
Duration: 2009 Jun 282009 Jul 1

Other

Other43rd U.S. Rock Mechanics Symposium and 4th U.S.-Canada Rock Mechanics Symposium
CountryUnited States
CityAsheville, NC
Period09/6/2809/7/1

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geology
  • Geotechnical Engineering and Engineering Geology

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