Oil-Water Two-Phase Flow Behaviors in Fracture-Cavity Carbonate Reservoirs With Fluid-Solid Coupling
To enhance the recovery of fracture-cavity carbonate reservoirs and investigate the oil-water two-phase flow behaviors under fluid-solid coupling effect,a Darcy-Stokes two-phase flow model was established based on the fluid flow patterns in different media.According to the principles of effective stress and the generalized Hooke's law,an oil-water two-phase Darcy-Stokes coupled mathematical model suit-able for fracture-cavity carbonate reservoirs was developed.Macroscopic and microscopic simulations of oil-water two-phase flows were con-ducted for carbonate reservoirs with and without fluid-solid coupling effect.The results show a significant difference in oil-water two-phase flow behaviors within the matrix zones of reservoirs with and without fluid-solid coupling effect,but a small difference within cavities.Wa-ter injection rate greatly influences oil-water flows in fracture-cavity carbonate reservoirs.
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