.am / Nvp / Dmmac Inverse Emulsion Polymerization And Performance Evaluation

In our country, chemical process is the main technique to enhance oil recovery. Up to now, polymer flooding is a mature way of chemical process. The most application polymers mainly include the synthetic polymers, such as partially hydrolyzed polyacrylamide and the natural polymers, for example, xanthan gum. They all have some problems when they were used in high temperature or high salinity reservoirs, so the developments of new class of polymers, which have the ability of both temperature endurance and salt resistance, have recently received considerable attention.For this, a new type of hydrophobically associating water-soluble polymer(AM/NVP/DMMAC) was devised and synthesized based on the acrylamide, N-vinyl pyrrolidone(NVP) which has the ability of temperature endurance, and a hydrophobically associating monomer(DMMAC) by inverse emulsion polymerization. The reaction is initiated by K₂S₂O₈/NaHSO₃ in a kerosene-water emulsion. Firstly, the emulsion stabilities were researched systematically and its conditions was confirmed. Then the reaction conditions were optimized through orthogonal design. The results show the optimal conditions are as followed: the reaction temperature is 40°C, the concentration of initiator(K₂S₂O₈), NVP, DMMAC are 0.1%, 5%, 0.4%relative to the quality of all monomer, respectively. Last, Infrared Spectra testified the structure of the polymer.The viscosity increment of the dilute aqueous solution with salt of the new type hydrophobically associating polymer(AM/NVP/DMMAC) was studied. The influence of temperature was also tested.The experiments in the paper show that AM/NVP/DMMAC hydrophobically associating polymer does behavior good abilities of temperature endurance and salt resistance, with a significant applying prospecting.