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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。
The injection properties of the polymer solution under the current experimental conditions are obtained by changing the pore size of the nuclear pore membrane, the concentration of the polymer solution, the concentration of the formulated water salinity and the experimental pressure to provide a reference for determining the injection parameters of the polymer solution under the actual reservoir conditions . The experimental results show that for the polymer with relative molecular mass of 30 × 106, the filter will have poor filtration when it passes through the membrane with the pore diameter of 3μm when the water salinity is 300mg / L and the polymer concentration is 1000mg / L , While the filter through the pore size of 10μm filter is better; polymer concentration from 500mg / L to 4500mg / L, the filter becomes poor; preparation of water salinity on the polymer solution filtration When the water salinity is more than 5000mg / L, the filtration performance of the polymer solution can be significantly increased, but the apparent viscosity loss is larger. Increasing the experimental pressure can improve the filtration performance of the polymer solution.