The paper studied the effects of shear-mode on rheological properties of hydrophobic associating polymer AP-P4' solution,whose concentration is 1 750 mg/L, sheared by Waring blender and the simulation device near wellbore. In order to study the influence on the rheological properties of the solutions, we compare their solutions sheared by different methods. It displayed that the viscoelastioity & non-Newtonian behavior of the solutions are different, although the apparent viscosity of the solutions is equal. The viscoelasticity & non-Newtonian behavior of the solution sheared by the simulation device near wellbore is only changed in 'magnitude , but the quality is not changed. The viscoelasticity & non-Newtonian behavior of the solution sheared by Waring blender is changed both in 'magnitude and in 'quality . At the same time, the solution obtained by different shearing method is different in its molecular weight,and in its distribution, resistance coefficient and residual resistance coefficient, variable increment of oil enhance and water constrain capacity. It is thought that it is not correspondent to the reservoir behavior to shear by Waring blender, it can only get the solution with the same viscosity, but other different rheological properties. The shearing by near-wellbore simulator can be more feasible in field practice.
Petroleum Geology and Recovery Efficiency
hydrophobically associating polymers
simulator device near wellbore