Numerical Simulation Study of Wellbore Temperature Distribution of Binary Compound Flooding Injection Well

Abstract

In the binary flooding development process, the viscosity and interfacial tension of binary system are the key to give its play a role of yield increasing effect. Binary system is injected into underground from ground through oil tube at normal temperature, injection speed and well depth are different, the temperature of binary system is different when achieving the formation, and its viscosity and interfacial tension are different. This paper regards wellbore as one-dimensional tube model, considering the thermal conductivity of oil casing annulus and casing pipe, and oil tube wall, set up the tri-coupling mathematical model of formation heat transfer, fluid flow and fluid heat transfer. Because the oil tube is processed as one-dimensional tube with wall thickness, so the problem of narrow diameter ratio is avoided, through numerical simulation, it is obtained different injection rate and well depth, the temperature distribution of wellbore. Further to obtain the binary system at bottom, and the variation relation of its physical properties over the injection rate and injection temperature.