The polymer performance evaluation and optimization of polymer flooding in the Weizhou 11-4 reservoir

Aiming at the reservoir temperature resistance and the liquid property and characteristic, we do some tests into the viscosifying characteristics, the stability, temperature resistance, salinity resistance and shear resistance, resistance coefficient and residual resistance coefficient of polymer solution by collecting high performance products in temperature resistance and salinity resistance both here and aboard. And we introduce the method of fuzzy comprehensive judgment and make a comprehensive and objective evaluation on the ability of improving mobility ratio and enlarging sweepage efficiency of different polymer solution. It has been proved in practice that fuzzy comprehensive judgment is an easy and effective method in optimization choice of polymer solution. Comprehensive analysis of experiment results shows that the property of the French polymer SNF is superior in overall evaluation.