大港油田孔南地区孔一段冲积环境储层流动单元划分方法探讨

Discussion on classification method of reservoir flow unit in alluvial environment in Kong 1 member of Kongnan area, Dagang oilfield.

针对大港油田孔南地区孔一段冲积环境储层,开展了流动单元划分参数筛选和流动单元分类方法研究。在划分流动单元时,渗透率是其基本参数,对层间弱非均质性多油层砂岩合采、层间强非均质性多油层砂岩合采、层间原油性质差异大的多油层砂岩合采、厚油层等不同类型油藏,要分别取舍孔隙度、有效厚度、流体性质等不同的参数;自组织迭代模糊聚类算法比系统聚类法的效果要好,是流动单元划分方法的首选。

Parameter screening and classification method of flow unit were studied in alluvial environment in Kong 1 member in Kongnan area of Dagang oilfield. Permeability is the basic parameter when classifying the flow unit. For different types of reservoirs such as commingled production reservoirs of multizone sandstones with weak interlayer heterogeneity,strong interlayer heterogeneity and great difference of interlayer crude property,and thick reservoir, different parameters should be accepted or rejected such as porosity,effective thickness and fluid property. The effect of self-organized iteration fuzzy clustering arithmetic is much better than that of system clustering method and is the priority of flow unit classification method.