聚合物溶液的粘弹性对驱油效率的影响

Effect of viscoelasticity of polymer solution on oil displacement efficiency

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 .

Through the displacment oil experiment in core and in simple glass model pickled channel, the effect of viscoelasticity of polymer solution on oil displacement efficiency is thoroughly studied. It indicates that polymer solution with viscoelasticity can not displace the residual oil in the 'dead' end of flow channel after water flooding, but it can displace the mobile residual oil in the 'dead' end of flow channel. The ultimate recovery factors are different for Newton fluid and viscoelastic fluid with the same viscous viscosity. The ultimate recovery factor displaced by polymer solution is higher than that displaced by glycerin after water flooding. The oil displacement efficiency by polymer solution with viscoelasticity is higher than that of non-elastic fluid.