Journal
ROCK MECHANICS AND ROCK ENGINEERING
Volume 49, Issue 2, Pages 477-485Publisher
SPRINGER WIEN
DOI: 10.1007/s00603-015-0760-8
Keywords
Permeability resistance; Shear deformation; Compaction; Fissures' closure; Tortuosity
Funding
- National Nature Science Foundation of China [51278383, 51238009, 51025827]
- Key Scientific and Technological Innovation Team of Zhejiang province [2011R50020]
- Key Scientific and Technological Innovation Team of Wenzhou [C20120006]
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A unified permeability evolution model is proposed to capture the evolution of permeability induced by stress. This model is formulated within a conventional permeability-porosity power function, with special attentions being paid to the effects of shear deformation-induced tortuosity and compaction-induced closure of fissures through a permeability resistance parameter. This model contains a small amount number of parameters, which can be calibrated based on conventional experiments. The proposed model is validated through comparison between model simulation and experimental results for sandstones under a wide range of confining pressures. Good performance demonstrates the capability of the proposed permeability evolution model.
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