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正确划分单井岩性剖面,莫过于大量取心,但事实上是不可能的,因而一般地借助于测井信息。用岩心资料定出相应井段的岩性,这些岩性可以用各种地球物理测井数据为指标来描述;而没有取心的井段即岩性未知的井段,也可以用测井信息对比得到的相同的指标来描述,于是,沿单井剖面获得一系列有序的数组,这些是进行聚类分析的原始资料。聚类分析是研究分类问题的一种数理统计方法。
Correctly dividing a single-well lithological profile is a lot more coring, but in fact it is impossible to do so, so logging information is generally avail- able. The lithology of the corresponding intervals can be determined by the core data. These lithologies can be described by using various geophysical logs as an indicator. However, the sections without coring, that is, the segments with unknown lithology, can also be identified by logging information By comparing the same indices obtained, a series of ordered arrays are obtained along a single well profile. These are the original data for cluster analysis. Clustering analysis is a mathematical statistical method to study the classification problem.