利用元素录井资料的随钻岩性判别方法  

Lithology identification method while drilling based on element mudlogging information

作　　者：李春山[1,2] 陈英毅[3] 孙卫[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室地质学系,陕西西安710069 [2]中国石油大学石油工程学院,山东青岛266555 [3]中国石化华北石油局,河南郑州450042

出　　处：《中国石油大学学报（自然科学版）》2011年第6期66-70,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油化工股份有限公司项目(P08001)

摘　　要：针对综合录井过程中微细岩屑识别岩性困难的问题,利用X射线荧光(XRF)测量的微细岩屑中的元素含量、谱图和测井资料,对随钻录井岩性判别方法进行研究。结果表明:XRF测量的元素含量与岩屑中矿物含量具有相关性,Si、Al、Fe等元素含量与自然伽马测井曲线存在相关性;通过XRF测量数据可计算岩屑中的砂泥质含量,并可用于判别砂泥岩剖面的岩性;相同岩性的XRF谱图具有相似性,利用这种相似性可判别岩性。现场资料验证结果证实了综合判别法可提高岩性判别符合率。To overcome the difficulties in identifying lithology of fine cuttings, a method was developed to identify lithology while drilling by using element eontent and spectrum determined by X-ray fluorescence （XRF） and logging data. The results show that the element content correlates to mineral content of cuttings, and element contents of Si, A1 and Fe correlate to GR logging curve. XRF data can be utilized to calculate shaliness of cuttings and determine the lithology of sandy mudstone for- mation. XRF spectrogram of the same lithology has some similarity, which can be used for lithology identification. The field data show that such a comprehensive method can improve the accuracy of lithology identification.

关 键 词：元素录井 测井 X射线荧光 元素含量 XRF谱图 岩性 判别 

分 类 号：P631.81[天文地球—地质矿产勘探]