过滤因子评价方法的应用研究

Application research on testing method of filter factor

通过改变核孔滤膜孔径、聚合物溶液浓度、配制水矿化度浓度以及实验压力,得到聚合物溶液在当前实验条件下的注入性,为确定实际油藏条件下聚合物溶液注入参数提供参考。实验结果表明:对于相对分子质量为30×106的聚合物,在配制水矿化度为300mg/L,聚合物浓度为1000mg/L条件下,通过孔径为3μm的滤膜时滤过性较差,而通过孔径为10μm的滤膜时滤过性较好;聚合物浓度由500mg/L增加到4500mg/L时,滤过性变差;配制水矿化度对聚合物溶液的滤过性有较大影响,当配制水矿化度大于5000mg/L时,聚合物溶液的滤过性能可显著提高,但表观黏度损失较大;提高实验压力有利于提高聚合物溶液的滤过性能。

By changing the test conditions such as film pore size,polymer concentration,TDS of brine and pressure,the injectivity of polymer solution under the current experimental conditions was obtained,which can provide scientific basis for derermination of polymer solution injection parameters under the real geological conditions.The results showed that in the condition such as 28×106 relative molecular weight,300mg/L TDS of brine,1000mg/L polymer concentration,the polymer solution had a bad filterability with 3μm pore size of film,but a good filterability with 10μm pore size of film.With increase of polymer concentration,the filterability of polymer solution became worse and worse.With increase of TDS of brine,the filterability of polymer solution became better and better,but the apparent viscosity became smaller.Improving pressure helped to improve the filterability of polymer solution.