Study of distribution regulation of remaining oil in X reservoir

In order to improve oil recovery at high water-cut stage, it is necessary to realize the distribution regulation and forming reasons of remaining oil. On the basis of delicate reservoir description, combined the feature of production performance, the remaining oil distribution of X reservoir is studied with the application of reservoir numerical simulation.History matching is carried out on 187 production wells, and the matching accuracy reaches86 % that conforms to the requirements of the engineering precision. Through the analysis of the history matching results, there are two distribution modes in the plane, schistose remaining oil and interlace mode remaining oil. While in vertical direction, due to the physical differences, the remaining oil is mainly distributed in the fourth layer with large reserves and poor physical property. With the result, the forming reasons of the remaining oil are analyzed and obtain the proportion of each type of remaining oil, which contain well pattern type, inter well type, fault type and interlayer interference type.