Acrylamide terpolymer oil displacement agent synthetic method research

The invention relates to acrylamide terpolymer oil displacement agent synthetic method research. Starting from the idear of increasing the rigidity of the polymer molecular chain, HPAM modified product PV AA with good salt tolerance and high-temperature resistance can be obtained by reverse phase emulsion polymerization method from vinyl pyrrolidone (N V P) and acrylic acid (AA), acrylamide (AM) and other raw materials. Compared with aqueous solution polymerization, the reverse phase emulsion polymerization method has the advantages of simple after treatment, and can save a lot of precipitation reagent, the vinyl pyrrolidone modified polyacrylamide copolymer salt tolerance can be improved, especially the resistance to calcium ions can be markedly increased, and the acrylamide terpolymer oil displacement agent is suitable for use as an oil displacement agent for high salinity oilfields. Moreover, by the introduction of the modified monomer, the copolymer has good thermal stability.