摘要
Using the method of multi-parameter statistical cluster analysis,the flow-units of Chang4+522 single sand bed of Yanchang Formation are divided to A category, B category and C category. The experiment of micro-water-flooding describes the different of pore structure, micro-water-flooding seepage features and oil displacement efficiency diversity. And the rationality of classification results is verified by the experiment from the viewpoint of dynamic analysis.It suggests that: A-type and B-type flow-units have the characteristics of thicker of sandstone and higher FZI, good-connectivity, lower displacement pressure, and the flow-unit of A and B are beneficial to higher-yield area in Jiyuan oilfield. The flow-unit of C has bad water-flooding, and is the benefit area of remained-oil distribution and the potential position of increasing productivity.