Study On Performance Evaluation And Mechanism Of Polymer Surfactants

In this paper,the new polymer-polymer surfactant is studied systematically on performance evaluation and Mechanism.The microcosmic characteristic of four kinds of polymer surfactant solution is observed by scanning electronic microscopy.Based on the observation,it is shown that all the four kinds of samples form regular network structure in the rinsing.Based on tests of rheological behavior,it is concluded that viscosity of polymer surfactant is higher than the MO4000 as the same concentration and its salt endurance,rheological behavior and viscoelasticity are also better than the MO4000.The emulsification experiments shows:the emulsification capacity of polymer surfactant is better than common polymer.Wettability changing effects are studied by dynamic contact angle measurement nstrument,showing good wettability changing ability of polymer surfactant.Basded on static adsorption experiment,it gives the adsorption of polymer surfactant.Basded on Displacement experiments,it is shown that the polymer surfactant has high coefficient of drag and residual resistance factor.According to the results of microcosmic experiment,it is observed that the residual oil significantly reduced after polymer surfactant flooding in water-wet micromodel and oil-wet micromodel.In water-wet micromodel the oil flow mechanism is the entrainment by polymer surfactant solution,emulsification and Wettability changing effect;and in oil-wet micromodel the oil flow mechanism is mainly the bridging of two oil films and oil thread with emulsification.Displacement experiments confirmed that the oil recovery can be enhanced by about 10%,and the Water cut can be reduced,the pressure can be increased,showing excellent results of increasing oil and enhancing oil recovery.