低剪切速率下部分水解聚丙烯酰胺溶液的流变特性研究

在低剪切速率下，用HAAKE RS150流变仪测定了溶液浓度、相对分子质量和含盐浓度对部分水解聚丙烯酰胺（HPAM）溶液流变性能的影响。结果表明，溶液浓度和相对分子质量对HPAM溶液流变性能的影响是由于HPAM溶液中大分子之间形成的网状结构的稳定性能所致，而含盐浓度对HPAM溶液流变性能的影响是由于HPAM溶液的带电性能所致。因此，增大HPAM溶液与油膜间作用力的主要措施是：第一，增大HPAM溶液的浓度或相对分子质量；第二，减少HPAM溶液的舍盐浓度。这样有利于提高聚合物的驱油效率。

Study on Rheology of Partially Hydrolized Polyacrylamide Solution in Low Shear Rate

In low shear rate,HAAKE RS150 rheometer is used to measure effect of concentration,relative molecular quality and salt content concentration on rheology of partially hydrolyzed polyacrylamide solution.The result shows that effect of concentration and relative molecular quality is caused by stable performance of net structure forming among large molecules in HPAM solution.Effect of salt content concentration is cause by charged performance of HPAM solution.Thus the main method for increasing action beween HPAM solution and oil film is: first,increase concentration of HPAM solution or relative molecular quality of HPAM;second,decrease salt content concentration of HPAM solution.This is favorable for improving displacement efficiency of polymer.