Phase-Field Simulation of Imbibition for the Matrix-Fracture of Tight Oil Reservoirs Considering Temperature Change

Injection water temperature is often different from that of the reservoir during injection development in tight reservoir. Temperature change causes fluid properties and oil-water interface properties, which further affects imbibition process. In this paper, a matrix-fracture non-isothermal flow model reservoirs established solved by finite element method based on phase-field method. The ideal inhomogeneous rock structure was used to study influence single factor imbibition. actual temperature. mechanism process studied micro-level. It found enters matrix along with small pores, oil driven into macropores then fractures. changing contact angle, interfacial tension, viscosity ratio. Reducing angle ratio increasing tension are conducive increase usually beneficial occurrence Moreover, core degree lower than structure. distribution particles has significant This provides microscale theoretical support for seeking reasonable velocity, pressure gradient, temperature, well-shutting time field reference formulation parameters.