判别分析技术在油气藏地层压力划分中的应用

Application of discriminant analysis technology in formation pressure division of oil and gas reservoirs

判别分析技术是以明确的分类标准为基础,从判识对象的各参数特点来分析其归属于某个类别的一种多变量间因果关系的统计方法。为分析石油地质中地层压力特征,基于多元统计分析方法,通过判别分析技术对G11井压力进行分析,判断某一深度的压力类型。分析表明,G11井压力判别比较准确,回代误判率为10.0%。

Discriminant analysis technology is a statistical method based on clear classification criteria,which analyzes the causal relationship between multivariable belonging to a certain category from the characteristics of each parameter of the identified object.In order to analyze the characteristics of formation pressure in petroleum geology,the pressure of G11 well is analyzed by discriminant analysis technology based on multivariate statistical analysis method to determine the pressure type at a certain depth.The analysis shows that the pressure discrimination of G11 well is relatively accurate and the misjudgment rate of back substitution is 10.0%.