The finite-element formulation of a coupled fluid flow and geomechanics for two-phase fluid flow through fractured porous media is presented. Two porosities, pores and fractures, and five phases are introduced. The two fluids are taken as wetting and non-wetting. The governing equations are derived based on the theory of poroelasticity, the effective stress principle, and the balance equations of mass and momentum, taking into account the solubility of non-wetting fluid into wetting fluid. Spatial and temporal discretisation of the governing equations have been realised through Galerkin method and the finite difference technique, respectively. A three-dimensional numerical code has been developed and validated based on the previously published data in the literature. Various applications of the model have been demonstrated through three field-scale examples.
|Journal||International Journal of Geomechanics|
|Number of pages||14|
|Publication status||Published - 2015|
- Double-porosity medium
- Fractured reservoirs
- Two-phase fluid flow
- Coupled formulation