不稳定注水宏观地质模型及适应性分析

Applicability of macroscopic geological model for unstable waterflooding

不稳定注水技术是针对非均质油藏的开发方法,但现阶段不稳定注水主要集中在油田应用研究,其实验研究与现场应用存在偏差。以现阶段不稳定注水宏观地质模型的层内与层间模型为基础,运用不稳定注水理论,结合油藏实际进行分析可知,由于储层的垂向非均质使得层间存在非渗透层,油水交渗难以实现,因此只有层内模型能够明显地体现非均质油藏不稳定注水的宏观机理。该研究对系统地指导油田生产有一定的意义。

Unstable waterflooding is a development method for heterogeneous reservoirs.However,unstable waterflooding at present mainly limits to applied study.There is discrepancy between experimental study and field application.It can be known from unstable waterflooding concept and practical reservoir analysis based on interlayer and intralayer macroscopic geological models that there is interlayer impermeable bed due to vertical heterogeneity,and oil-water seepage is hard to realize.Therefore,only intralayer model can manifest the macroscopic mechanism of unstable waterflooding for heterogeneous reservoirs.