Study On The Mechanism And Performance Evaluation Of Surface Active Polymers

As a promising chemical oil displacement agent,the polymer with surface activity has been paid attention by domestic and foreign oil fields and scientific research institutes,and some problems of field oil displacement have been solved.However,there are few studies on the performance,displacement mechanism and application of specific surfactant in oilfield.In view of the specific reservoir conditions of a block in Daqing oilfield,the hydrophobic associating polymeter AVS is synthesized in this paper,with the background of the further improvement of the field demand after its polymer flooding.By measuring viscosity,AVS can still maintain high viscosity under complex conditions such as high temperature and high salinity and long time placement.Static emulsification experiments were carried out to determine its emulsifying capacity and good stability of the emulsion.Through core seepage experiment,the resistance coefficient and residual resistance coefficient of polysurfactant AVS solution are higher than that of HPAM solution.After selecting suitable injection slugs and solution concentration,polymer flooding agent AVS solution can enhance oil recovery by 15%.This paper provides a theoretical basis for the practical application of the polymeric surfactant AVS,and has guiding significance for practical application in the field.