Abstract: Because the remaining oil distribution is scattered and complex,and there are more influencing factors on multi-layer heterogeneous sandstone reservoir in the late period of high water cut,it is difficult to identify the remaining oil distribution of each layer.A new method for determining the remaining oil distribution in single layer with multiple fuzzy comprehensive evaluation method was developed on the basis of a comprehensive analysis on geology and development factors affecting the remaining oil distribution and the data of geology and production performance in various areas.This method has been successfully applied to research the remaining oil in the tertiary infilling test area of Daqing Oilfield.The core analysis results of a new inspection well in tertiary infilling test area show that the accuracy of identification with above method is over 81.4%.This method is effective to study the remaining oil distibution of single layer in the multi-layer sandstone reservoir.

Key words: multi-layer sandstone reservoir, fuzzy comprehensive evaluation, single layer, remaining oil distribution, identification

摘要： 针对非均质多层砂岩油田高含水后期的剩余油分布高度零散、影响因素多、识别难度大等问题,在对影响剩余油分布的地质及开发因素综合分析的基础上,结合不同研究区块的动静态资料情况,提出了利用多层次模糊综合评判法识别单层剩余油分布的有效方法,并在大庆油田高含水后期三次加密试验区剩余油研究中得到成功的应用。经新钻检查井资料检验,单层剩余油识别符合率为81.4%,为非均质多层砂岩油田单层剩余油分布研究提供了新的方法。

关键词: 多层砂岩油田, 模糊综合评判法, 单层, 剩余油分布, 识别