Research On Property Evaluation And Oil Displacement Efficiency Of Functional Polymer Surfactant

Enhanced oil recovery (called tertiary oil recovery in the past) processes have as their objective the increase of recovery from reservoirs depleted by conventional recovery, i.e. by primary recovery with natural production mechanisms or by secondary recovery with water-flooding or gas injection. Enhanced oil recovery techniques can be subdivided into three categories:thermal, miscible and chemical. In our country, chemical process is the main technique to enhance oil recovery. Up to now, polymer flooding has succeeded in many oil fields, but both the effectiveness and efficiency of oil recovery need further promoting. Because the most application polymers, such as partially hydrolyzed polyacrylamide and Xanthan gum, have met some problems when used in high temperature or high salinity reservoirs. So the developments of new class of polymers become very urgent.The Functional Polymer Surfactant (FPS) for which exhibit special rheological properties different from that of conventional polymers have recently received considerable attention.In order to cause FPS to further apply in the oil-field development production, In this paper, FPS is studied systematically on Physics and chemistry performance,oil displacement mechanism and efficiency.The microcosmic characteristic of FPS in solution is observed by scanning electronic microscopy, Meanwhile obtains Increasing viscosity and the salt enduran-ce of FPS by experiment.Basded on Displacement experiments,it is shown that FPS has high resistance and residual resistance factor, and conducts the research to the injectivity of FPS.The emulsification experiments shows:the emulsification capacity of FPS is better than the common polymer.Through the steady and dynamic shear experiment, the effect of different mass concentration of FPS on its Rheological Properties and Viscoelasticity,and its Rheological Propertiesand Viscoelasticity are also better than the Macromolecular weight polym-er.According to the results of microcosmic experiment, it is observed that the residual oil significantly reduced after FPS flooding with the emulsified phenomenon.Displacement experiments confirmed that the purpose may be achieved by using FPS flooding to Increases oil efficiency and enhance sweep efficiency and enhancing oil recovery. This research can offer theory and experiment foundation for the designed scheme of associating FPS driving oil and on-the-spot application.