A computational model for coupled multiphysics processes of CO2 sequestration in fractured porous media |
| |
| Institution: | 1. College of Physics and Electronic Information Engineering, Zhejiang Normal University, Jinhua 321004, China;2. Department of Information Systems, College of Computing and Information Technology, University of Bisha, Bisha 61922, Saudi Arabia;3. Department of Computer, Damietta University, Damietta, Egypt;4. Laboratory for Computational Mechanics, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, Viet Nam;5. Faculty of Mechanical - Electrical and Computer Engineering, Van Lang University, Ho Chi Minh City, Viet Nam;6. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, China;7. Department of Mathematics, Faculty of Science, Zagazig University, Zagazig, Egypt;8. Faculty of Computer Science &Engineering, Galala University, Suze 435611, Egypt;9. Artificial Intelligence Research Center (AIRC), Ajman University, Ajman 346, United Arab Emirates;10. Department of Electrical and Computer Engineering, Lebanese American University, Byblos, Lebanon |
| |
| Abstract: | In this paper, a computational model for the simulation of coupled hydromechanical and electrokinetic flow in fractured porous media is introduced. Particular emphasis is placed on modeling CO2 flow in a deformed, fractured geological formation and the associated electrokinetic flow. The governing field equations are derived based on the averaging theory and the double porosity model. They are solved numerically with a mixed discretization scheme, formulated on the basis of the standard Galerkin finite element method, the extended finite element method, the level-set method and the Petrov–Galerkin method. The standard Galerkin method is utilized to discretize the equilibrium and the diffusive dominant field equations, and the extended finite element method, together with the level-set method and the Petrov–Galerkin method, are utilized to discretize the advective dominant field equations. The level-set method is employed to trace the CO2 plume front, and the extended finite element method is employed to model the high gradient in the saturation field front. The proposed mixed discretization scheme leads to a convergent system, giving a stable and effectively mesh-independent model. The accuracy and computational efficiency of the proposed model is evaluated by verification and numerical examples. Effects of the fracture spacing on the CO2 flow and the streaming potential are discussed. |
| |
| Keywords: | Double porosity Hydromechanics Streaming potential XFEM Level-set |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
