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在人工均质岩芯和变异系数０．７２的二维纵向非均质岩芯上，用３种分子量（５５０万、１１００万、１８００万）的聚合物溶液在等浓度（１０００ｍｇ／ｌ）和等粘度（１１．０２ｓ－１、４５℃下３４．５ｍＰａｓ左右）两种条件下进行了驱油实验。随着聚合物分子量的增大，均质和非均质岩芯上的驱油效率在等浓度驱替条件下有大幅度升高，在等粘度驱替条件下也有一定程度的升高。在大庆油田，选用高分子量的聚合物有利于提高聚合物驱的经济效益。
Three kinds of molecular weight (5.5 million, 11 million, 18 million) polymer solutions were prepared at equal concentrations (1000 mg / l) on a two-dimensional longitudinal heterogeneous core with an artificial homogeneous core and a coefficient of variation of 0.72 Viscosity (11.02s-1, about 14.5mPas at 1,45 ℃) under two conditions were flooding experiments. With the increase of polymer molecular weight, the flooding efficiency of homogeneous and heterogeneous cores increases greatly under the condition of equal concentration flooding and increases to some extent under the conditions of equal viscosity flooding. In Daqing Oilfield, the selection of high molecular weight polymer is conducive to improving the economic benefits of polymer flooding.