Effects of timing of high-concentration polymer flooding on oil displacement efficiency;

The Effect on Oil Displacement Efficiency of Viscosity of Alkaline-Surfactant-Polymer and Polymer Flooding Solutions;

31 s-1),the shearing resistance,and the oil displacement efficiency of high concentrated(2.

Stability and displacement efficiency evaluation of high-concentration polymeric system;

This paper uses reservoir numerical simulation method to study the effect of injection rate on the displacement efficiency of polymer flooding and analyzes the reason of the effect.

According to the actual request of field production,using the equipment testing and theoretical analysis method,this paper analyzes the effect of the two stabilizers on viscosity,adsorption capacity,resistance coefficient,residual resistance factor and flooding effect of sewage polymer solution,and discusses its working mechanism.

Reservoir influence factors on polymer flooding efficiency;

In order to use sewage water from polymer flooding units in Daqing oil field, the relationship between polymer molecular structure and its flooding efficiency have been studied in this paper.

Since viscosity and stability of polymer are greatly affected by temperature,it is important to analyze influence factors of temperature distribution in polymer injection wells for improving polymer injection scheme and studying oil displacement effect.