Study of dual-porosity poroelasticity in two-phase fluid flow

This paper presents the mathematical formulation and numerical results of two-phase fluid flow and rock deformations in fractured hydrocarbon reservoirs using the dual-porosity poroelastic approach. Deviating from traditional single-phase models, the wetting and nonwetting fluids, typically water and oil, are considered as immiscible liquids resident in the interacting fractures and matrix blocks of deformable formations. In addition, the developed governing equations follow rigorous volume fraction basis, instead of being proposed via phenomenological intuitions adopted in many existing dual-porosity models. The significance of this approach rests on its ability to include additional components of fluids as well as solids, as they may be needed in the actual reservoir simulation.