中国大陆科学钻探主孔100～2000m超高压变质岩的识别  

The Identification of Ultrahigh-Pressure Metamorphic Rock in CCSD Main Hole from 100 to 2000 Meters

作　　者：杨怀杰[1] 

机构地区：[1]中国地质大学地球物理与空间信息学院,湖北武汉430074

出　　处：《工程地球物理学报》2012年第4期445-451,共7页Chinese Journal of Engineering Geophysics

摘　　要：通过对CCSD主孔100～2000m井段变质岩测井资料以及岩芯资料的综合分析,结合多元统计学方法,建立了一套用Fisher判别变质岩的二级模型。利用100～1000m井段的岩性测井资料建立模型,对1000～2000m井段的岩性进行识别,一级大类变质岩的识别准确率为89.68%,二级片麻岩的识别准确率为92.96%,二级榴辉岩的识别准确率为84.38%,取得了良好的应用效果,与单一的识别方法相比,提高了准确率。Based on the logging and coring data from depths 100 to 2000 meters in CCSD Main Hole, as well as multivariate statistical methods, we establish a metamorphic rocks recognition model by Fisher discriminant which has two levels. We build the models to i- dentify the lithology from 1000 to 2000 meters with the logging data from 100 to 1000 me- ters： the first level of metamorphic rock identification rate is 89.68%, the second level of gneiss identification rate is 92.26%, and the second level of eclogite identification rate is 84.38%. Compared to a single identification method, the effect of its application is a- chieved and the accuracy is improved.

关 键 词：中国大陆科学钻探 测井响应 变质岩 岩性识别 

分 类 号：P631[天文地球—地质矿产勘探]