J油田长2油层组流动单元划分方法及其对水驱渗流的影响

Flow Unit Division Method of Chang 2 Reservoir and Its Influences on Water Flooding Percolation in J Oilfield

以油藏单砂体精细地质研究为基础,根据流动单元的基本理论和方法,对鄂尔多斯盆地J油田延长组长2油藏不同流动单元开发特征进行了研究。运用聚类分析方法,依据流动层段指标(地层系数和储能系数)将油藏划分为五类流动单元。主力油层长21^2以一类流动单元为主,长21^3、长22^2以二类流动单元为主;长22^1以二、三类流动单元为主。受不同流动单元间渗流规律差异影响,处于不同流动单元内的注采井组间水驱受效情况差。

Based on the fine geological study of individual sandstone body and the basic theory method of flow unit,the development characteristics of different flow units are studied in Chang 2 reservoir,J Oilfield,Ordos Basin.According to flow index(formation coefficient and storage coefficient),the reservoir is divided into five types of flow units by cluster analysis.The main reservoir Chang 21^2 is dominated by type 1 flow units,with Chang 21^3 and Chang 22^2 mainly composed of type 2 flow units,and Chang 22^1 dominated by type 2 and type 3 flow units.Influenced by the percolation characteristics among different flow units,the flow units affect the water-flood effect of injection-production wells.