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通过简化孔隙模型驱油实验和岩心驱油实验 ,进一步研究了聚合物溶液的粘弹性对驱油效率的影响 ,结果表明 :具有粘弹性的聚合物溶液不能将“水湿”盲端中的水驱残余油驱出 ,但可以驱替未进行水驱孔隙盲端中的可动残余油 ,具有相同粘性的牛顿流体和粘弹流体的最终采收率不同 ,水驱后再用聚合物驱替的最终采收率高于水驱后再用甘油驱替的最终采收率 ,并且粘弹性聚合物溶液的驱油效率高于无弹性流体的驱油效率 .
The effect of viscoelasticity of polymer solution on flooding efficiency was further studied by simplifying the displacement experiments of pore model and core flooding experiments. The results show that the viscoelastic polymer solution can not separate the water Drive the residual oil out, but can displace the movable residual oil in the blind end of the water flooding hole, the final recovery rate of the Newtonian fluid and the visco-elastic fluid with the same viscosity is different, then the polymer flooding Of the final recovery higher than the final recovery of glycerin after water flooding, and the displacement efficiency of the viscoelastic polymer solution is higher than that of the inelastic fluid.