期刊
COMPUTERS AND GEOTECHNICS
卷 106, 期 -, 页码 143-160出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2018.10.017
关键词
Discrete fracture; Fracture tensor; Cell-level discontinuity; Stress sensitivity; Finite element method
类别
资金
- National Natural Science Foundation of China [51674246, 51674250]
- Creative Research and Development Group Program of Jiangsu Province [2014-27]
- China Postdoctoral Science Foundation [2016M590523]
A fully coupled fracture equivalent continuum-dual porosity model is proposed to investigate hydro-mechanical coupling phenomena in fractured porous media. An improved fracture tensor is then developed to transform the local discontinuities at cell level to the anisotropic continuum at macro-scale. This model is incorporated into a set of nonlinear partial differential equations and numerically solved by multi-time-step finite element algorithm. The approach is then applied to a field-scale simulation of shale gas reservoir. Results indicate that the proposed method can be applied to insights into the field-scale hydro-mechanical coupling with high-density fractures in any arbitrary orientation within manageable computational cost.
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