Abstract: Salt-resistance polymer ASPAM used for oil flooding and the molecular aggregation of hydrolysis polyacrylamide PHPAM are researched by using electronic scanning, the process of injecting polymer in situ is simulated, and the influence of the polymer solution concentration, make-up water salinity, multi-level filtration and mechanic shearing on polymer molecular aggregation is analyzed, by means of core test, the characteristic of ASPAM flow through porous media is analyzed. Result indicates ASPAM shows, when aggregation of molecular reaches aggregating situation, the viscosity increases considerably, compared with PHPAM, ASPAM is of better ability of salt- resistance and shearing-resistance, in porous media, its dynamic liquid-keeping is more. The research is meaningful for using salt-resistance polymer flooding.

Key words: polymer, salt-resistance, aggregation, characteristic of flowing through porous media, Daqing Oilfield