说明：  测井指标数据度量不同，变量间的数值大小相差较大，为了将量纲不同、大小悬殊的不同指标数据变量转化到同等水平上，所以在进行数据分析前，先将变量分别做归一化处理
(Logging data measure different indicators, numerical size larger difference between variables, in order to a different dimension, a different variable size disparity index data conversion to the same level, so before performing data analysis, the first variable were done normalization deal with)