Effect Of Interfacial Behavior Between Polymer And Oil Upon Displacement

In this thesis, a great deal of work is reviewed including the status of effect of interfacialbehavior between polymer and oil upon displacement, model of porous media. It is shown thatthe basic theories on effect of interfacial behavior between polymer and oil upon displacementon laboratory studies, the theoretical research needs further on. The porous medium in oil poolare simplified the undulating tube models, a mathematical mode is constructed from energyangle, effective numerical methods should be used to solve mathematical model, so as totheoretically study effect of interfacial behavior between polymer and oil upon displacement.Based on contraction-expansion characteristic of inner channel in actual pore media, selectundulating tube model which has the contraction-expansion cyclical process and the simplegeometry. In order to study theoretically the effect of interfacial behavior between polymer andoil upon displacement, we study the problems with porous dimension.An integral mechanical energy balance equation for the system is established, the relation ofinterfacial dimensionless axial displacement speed and dimensionless interfacial tension,interfacial viscosities and wetting angle between polymer and oil, the relation of dimensionlessflow rate dimensionless and interfacial tension, interfacial viscosities and wetting angle, and therelation of dimensionless average flow rate and dimensionless interfacial tension, interfacialviscosities and wetting angle. We study the effect of in dimensionless interfacial tension,interfacial viscosities and wetting angle between polymer and oil upon diaplacing velocity in theundulating tube mode is analyzed, conclusions are gained, when the direction of interfacialcurvature is adverse with the direction of polymer flooding, the dimensionless interfacial tensionand interfacial viscosities between polymer and oil all make dimensionless interfacial axialdisplacement speed, dimensionless flow rate and dimensionless average flow rate decrease, thelarger its value is, the more larger dimensionless interfacial axial displacement speed,dimensionless flow rate and dimensionless average flow rate decrease. When the direction ofinterfacial curvature is same with the direction of polymer flooding, the dimensionless interfacialaxial displacement speed, dimensionless flow rate and dimensionless average flow rate allincrease with the accretion of dimensionless interfacial tension.