Abstract:

There is still much remaining oil in postpolymer flooding, it is a issue how to improve recovery in postpolymer flooding. The authors of this paper research the methods of high elasticity HPAM flooding, including synthesis and choice of high elasticity polymer, difference of HPAM with braches, as well as nonbranches and physics simulation experimentation. The research results show (1)The viscosityelasticity increases as HPAM with branches molecular weight of same concentration and shearvelocity (f). (2)When shear velocity is low, HPAM with branches has bigger elasticity modulus (G′).when shear velocity is over 9s-1 the HPAM with braches x2x is bigger than HPAM with nonbranches.(3) When HPAM with branches molecular weight is low, it can also improve oil recovery. If its molecular weight grows bigger, the viscosityelasticity of its system becomes also bigger and it can entrance higher oil recovery.

Key words: high elasticity HPAM, HPAM with braches, HPAM with non branches, viscosity elasticity, oil recovery