A fully coupled fracture equivalent continuum-dual porosity model for hydro-mechanical process in fractured shale gas reservoirs. (February 2019)

• Record Type: Journal Article
• Authors: Liu, Jia; Wang, J.G.; Gao, Feng; Leung, Chun Fai; Ma, Zhanguo
• Is Part Of: Computers and geotechnics. Volume 106(2019)
• Page Start: 143
• Page End: 160
• Publication Date: 2019-02
• Subjects: Discrete fracture -- Fracture tensor -- Cell-level discontinuity -- Stress sensitivity -- Finite element method; Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2018.10.017
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: 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.