Study On Fluid Flow Regularity Of Fractued Vuggy Media In Carbonate Reservoirs

The fractured vuggy carbonate reservoirs are complex and diverse,and there are pores,fractures and holes with large anisotropy and heterogeneity.It is necessary to study the flow mechanism of fractured vuggy media.Based on the fracture and cave based on the combination of the N-S equation with finite element,and the use of ANSYS fracture cave type medium flow law research.The typical conceptual model was established,and the fracture density,crack opening,hole position,hole density on the influence of permeability and flow pattern was studied,and the single-phase flow inside the seam pressure changes and flow velocity were researched.Speed change in the flow area or across the crack is very obvious,with the hydraulic radius of fluid mechanics and variable cross-section knowledge interpreting.The relationship between the injected volume and the degree of recovery was studied in the two-phase flow.The greater the crack opening,the more complex the network structure,the greater the degree of recovery.In the end,the paper gives the simulation of the hole and hole two-phase process,which is more intuitive to observe the change of water saturation in water flooding process.The above studies on the flow of fractured vuggy teservoires were helpful to make reasonable oil production speed and predict production and provide some theoretical basis for oilfie ld development.