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.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
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)
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
element mudlogging
well logging
X-ray fluorescence （XRF）
element content
X-ray fluorescence spectro-gram
lithology
identification
