低渗透油藏综合分类方法

METHOD OF THE COMPREHENSIVE CLASSIFICATION FOR LOW-PERMEABILITY OIL RESERVOIRS

低渗透油藏分类方法研究是对油藏进行科学管理、提高油田开发效果的一项重要工作。综合优选出7项低渗透油藏特征参数,应用主成分分析法将中国东部某油田73个低渗透开发单元7项油藏参数提炼成2个公因子:物性因子和丰度因子。2个公因子可以表征原始参数集84%的信息,不仅解决了各参数间存在相关性问题,而且解决了低渗透油藏分类参数选取的难题。然后用得到的公因子进行聚类分析,克服了主观因素的影响,并建立了各类别判别函数。实例应用表明,主成分分析法和聚类分析法相结合可以科学地对低渗透油藏进行多变量分类和开发效果评价。

The studies on the classifying method of low permeability oil reservoirs are important for the reservoir scientific management and enhancing the oilfield development effects. Seven characteristic parameters of the reser- voirs are comprehensively chosen and moreover with the help of the analyzing method of the principal component, the common factors of the parameters for 73 produced units are screened： physical and abundance factors. These two factors can characterize 84% information of the ori^4nal data set, thus the coherent problems among the parame- ters can not only be solved, but also the problems of sorting and aquiring the classifying parameters of these low- permeability oil reservoirs can be resolved. The case history shows that the integration between the principal compo- nent and cluster analyzing methods can better and scientifically sort multiple variables and evaluate the development results.