对尼日利亚三角洲西部 10个油田的 5 1种油样的轻烃C7含量进行了分析。5 1种油样被分成 4组进行谱系聚类分析和主分量分析。聚类分析使用 7个变量 ,这些变量使各油组之间呈现出明显的区别 ,其中甲基环己烷和甲苯是区分这些油组最重要的变量。尽管油样被分成了 4组 ,但是它们的苯环含量 (6RP)普遍较高。原油中轻烃C7的分布研究表明 ,10个油田中有两个油田的油型具有同源性 ,而其他油田的油型则不具有同源性 The light C7 content of 5 1 oil samples from 10 oil fields in the western part of Nigeria was analyzed. Five kinds of oil samples were divided into four groups for cluster analysis and principal component analysis. Cluster analysis used seven variables that gave a clear distinction between oil groups, with methylcyclohexane and toluene being the most important variables in distinguishing these oil groups. Although the oil samples are divided into four groups, their benzene ring content (6RP) is generally high. Studies on the distribution of light hydrocarbons C7 in crude oil show that two of the 10 fields have homology with the oil types and the others with no homology