Experimental study of hydraulic fracturing in unconsolidated sands using X-ray CT method

Y. Omori, S. Jin, T. Ito, Y. Nagano, K. Sekine

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Hydraulic fracturing is applied for oil and gas production enhancement not only to hard rocks but also to soft rocks such as unconsolidated sands. In the latter case, fracturing behavior is not suitably represented by existing models for brittle, linear-elastic rocks. Thus we developed an apparatus for carrying out hydraulic fracturing experiment in a cylindrical specimen under triaxial compression and tried to observe the dynamic behavior of hydraulically-induced fracture in unconsolidated sands by using a x-ray CT scanner. In those CT images, we could detect clearly how the fracture propagated and then the fracturing fluid infiltrated around the fracture. As a result, we found that the shapes of the infiltrated regions changed obviously for two cases when the fracture was and was not induced, while there was a small difference in the peak pressure of fracturing fluid. Those phenomena indicate that permeability of the specimen play an important role rather than fluid pressure on fracture formation.

Original languageEnglish
Title of host publication47th US Rock Mechanics / Geomechanics Symposium 2013
Pages1974-1980
Number of pages7
Publication statusPublished - 2013 Dec 1
Event47th US Rock Mechanics / Geomechanics Symposium 2013 - San Francisco, CA, United States
Duration: 2013 Jun 232013 Jun 26

Publication series

Name47th US Rock Mechanics / Geomechanics Symposium 2013
Volume3

Other

Other47th US Rock Mechanics / Geomechanics Symposium 2013
CountryUnited States
CitySan Francisco, CA
Period13/6/2313/6/26

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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