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通过对相距只有 30 m的检查水驱效果的北 1- 6 -检 2 7井与检查聚合物驱效果的 1- 6 -检 2 6井驱替效果的对比分析 ,认为聚合物驱只是改变了油水流度比 ,扩大波及体积 ,进而提高了驱油效果。但是 ,由于聚合物并不能降低表面张力 ,因此 ,从道理上讲也不能减少油膜损失或者说提高驱油效率。与水驱相比 ,虽然人们观察到的现象是驱油效率的提高 ,在岩心分析中表现出来的是将中水洗变为强水洗 ,基于两口井中小层驱油效率最高值的一致性 ,可以推论如果继续水驱 ,那么将中水洗逐渐变为强水洗也是完全可能的 ,只是时间的长短而已 ,这是因为驱油效率定义本身并不受时间的限制。因此 ,确切地说聚合物驱可以提高波及效率 ,但不能认为聚合物驱可以提高驱油效率
By comparing and analyzing the flooding effect of wells 1-6 in northwest China where water flooding was only 30 m apart and the effect of flooding 1-6 on ocean flooding, the polymer flooding was only changed Oil-water flow ratio, expanding the volume of waves, thereby enhancing the flooding effect. However, since the polymer does not reduce the surface tension, it does not theoretically reduce the oil film loss or enhance the oil displacement efficiency. Compared with the water flooding, although the observed phenomenon is that the flooding efficiency is improved, the core analysis shows that the middlewash is changed into a strongwashing. Based on the consistency of the maximum value of the medium and low layer flooding efficiency in the two wells, Corollary If you continue to water flooding, then gradually wash water into a strong wash is also possible, only the length of time, it is because the definition of flooding efficiency itself is not subject to time constraints. Therefore, polymer flooding can improve the sweep efficiency, but it can not be considered that polymer flooding can improve flooding efficiency