Numerical Simulation of Fluid-Solid Coupling in Fractured Porous Media with Discrete Fracture Model and Extended Finite Element Method

Computation

Qingdong Zeng²  Jun Yao¹  Qinjun Kang² 

[1] School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China; E-Mail

关键词: fluid-solid coupling;    porous elasticity;    fractured porous media;    discrete fracture model;    extended finite element method;   

DOI  :  10.3390/computation3040541

来源: mdpi

【 摘 要 】

Fluid-solid coupling is ubiquitous in the process of fluid flow underground and has a significant influence on the development of oil and gas reservoirs. To investigate these phenomena, the coupled mathematical model of solid deformation and fluid flow in fractured porous media is established. In this study, the discrete fracture model (DFM) is applied to capture fluid flow in the fractured porous media, which represents fractures explicitly and avoids calculating shape factor for cross flow. In addition, the extended finite element method (XFEM) is applied to capture solid deformation due to the discontinuity caused by fractures. More importantly, this model captures the change of fractures aperture during the simulation, and then adjusts fluid flow in the fractures. The final linear equation set is derived and solved for a 2D plane strain problem. Results show that the combination of discrete fracture model and extended finite element method is suited for simulating coupled deformation and fluid flow in fractured porous media.

【 授权许可】

CC BY   
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