Physical Simulation And Theoretical Study Of Fluid Flow In Fractured Media

As the development of exploitation, the fractured hydrocarbon reservoir plays an important role in petroleum industry. There are abundant hydrocarbon resources in fractured reservoirs in China. But it is very difficult to understand the mechanism of fluid flow and exploit for the complexity of fractured reservoir. The current theories of fluid flow in fractured reservoir, based on cubic law or modified cubic law, are not applicable. It is significant to study the mechanism of fluid flow in fractured reservoirs. To study the mechanism of fluid flow and interfacial phenomena, macro- and micro-fractured models based on similarity theorem were designed. Single-and two-phase experiments were conducted in order to examine the effect of fracture aperture, fracture density, fracture network, fracture dip and fluid viscosity on fluid flow in fracture models. It is proved that the cubic law was not applicable in fractured reservoir. Fluid flow patterns in fractured media were also developed. Parameters of two-phase fluid flow, such as relative permeability, degree of reserve recovery and water ratio, were calculated. And the phenomena of interface and displacement front were observed clearly. The basic theory of fluid flow in fractured reservoir was developed by simulation study. The conclusions in this paper can provide the exploitation of fractured reservoir with theoretical basis.