厚油层中纵向非均质状态对聚合物驱油效果的影响

EFFECT OF VERTICAL HETEROGENEITY IN THICK RESERVOIR ON RESULTS OF POLYMER FLOODING

该文依据非均质变异系数相同,但不同渗透率分层在纵向上分布不同的厚油层,水驱及聚合物驱采收率的数值模拟结果,建立了不同渗透率分层在纵向上分布状态与厚层采收率间的关系的定量描述方法,深入地讨论了不同渗透率分层在纵向上的分布状态对厚油层聚合物驱油效果的彭响,为大庆油田在推广聚合物驱油时的合理选层问题提供了理论依据。

<ABSTRACT>: Based on the same variation factor of heterogeneity, vertical per-meability contrast in thick reservoirs and numerical result of waterflood and polymer flood recovery factors, the relationship between the distribution of vertical permeability contrast and recovery factor of thick reservoirs in aquantitative approach is established.The effect of the distribution of vertical permeability contrast on the result of polymer flood is further discussed, which provides a theoretical foundation for reasonable selecting layers in expanding polymer flooding in Daqing Oilfield.