Preparation and Performance Study of Self Breaking Functional Quaternary Co-polymer

A quaternary co-polymer PPDM with demulsification function was prepared by aqueous solution polymerization using acrylamide, acrylic acid, 2-acrylamide-2-methylpropane sulfonic acid, and demulsification functional monomer PD as raw materials. The structure of the co-polymer was characterized by infrared nuclear magnetic resonance and other methods; The solubility, viscosity increasing performance, oil displacement performance, and demulsification performance of polymer solutions under S oilfield conditions were tested. The results showed that after the addition of demulsifier functional monomers, the co-polymer PPDM and ordinary polymer PAM had a dissolution time of 20 min, and the viscosity could reach over 96% of the final viscosity. As the amount of demulsifier functional monomers increased, the viscosity increased to a certain extent, The oil displacement performance results show that the recovery rate of co-polymer PPDM is 5.7% points higher than that of ordinary PAM, and the demulsification performance is 2 times higher than that of ordinary PAM.