Abstract: This paper presents the experimental study on rheological behavior for the associated polymer solution through screen cloth and the relationship between screen coefficient and mass concentration and viscosity. Through analysis of injectivity of the associated polymer in porous media, it is found that this polymer is of good flow and injection properties under high pressure difference near the bottom hole perforation, bringing bigger drag coefficient under low pressure difference of deep pay zone in favor of improving oil-displacement efficiency of it. Meanwhile, the experimental result shows that the existing methods for evaluation of polymer solution injectivity cannot be used to properly and/or objectively appraise the behavior of associated polymer solution injectivity, which can be as an important guide for development of this new assessment method.

Key words: associated polymer, screen cloth, viscosity, porous medium