Simulation of hydraulic fracturing in brittle rocks
Paper
Paper/Presentation Title | Simulation of hydraulic fracturing in brittle rocks |
---|---|
Presentation Type | Paper |
Authors | Golshani, Aliakbar (Author) and Tran-Cong, Thanh (Author) |
Editors | Majdi, Abass and Ghazvinian, Abdolhadi |
Journal or Proceedings Title | ISRM International Symposium 2008: New Horizons in Rock Mmechanics - Developments and Applications |
ERA Conference ID | 60077 |
Journal Citation | 2, pp. 1047-1054 |
Number of Pages | 8 |
Year | 2008 |
Place of Publication | Iran |
ISBN | 9789690426531 |
Web Address (URL) of Paper | http://irsrm.net/ |
Conference/Event | ISRM International Symposium 2008: 5th Asian Rock Mechanics Symposium |
Asian Rock Mechanics Symposium | |
Event Details | ISRM International Symposium 2008: 5th Asian Rock Mechanics Symposium Event Date 24 to end of 26 Nov 2008 Event Location Tehran, Iran |
Event Details | Asian Rock Mechanics Symposium |
Abstract | [Abstract]: To investigate the breakdown pressure and the energy transferred to the surrounding rock, numerical simulations of circular boreholes under internal hydraulic pressure are carried out. For this purpose, a micromechanical continuum damage model proposed by Golshani et al. [1] is used. The simulation results show that the borehole breakdown pressure and the energy transferred to the surrounding rock are dependent on the mechanical properties of the rock, borehole size and far-field confining stresses. Although the energy transferred to the surrounding rock increases with increasing borehole size, the borehole breakdown pressure decreases. The analysis also shows that breakdown does not occur even if a crack initiated at a borehole wall. In fact, the breakdown occurs when the crack growth becomes unstable. In other words, breakdown pressure appears to correspond to the onset of unstable crack growth. |
Keywords | hydraulic fracturing; breakdown pressure; internal energy; crack growth; numerical simulation |
ANZSRC Field of Research 2020 | 401902. Geomechanics and resources geotechnical engineering |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | No evidence of copyright restrictions on web site. |
Byline Affiliations | Computational Engineering and Science Research Centre |
https://research.usq.edu.au/item/9yxz7/simulation-of-hydraulic-fracturing-in-brittle-rocks
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