Analysis of downhole logging data from CRP-2/2A, Victoria Land Basin, Antarctica: a multivariate statistical approach
Analysis of downhole logging data from CRP-2/2A, Victoria Land Basin, Antarctica: a multivariate statistical approach
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南极洲维多利亚陆盆地 CRP-2/2A 井下测井数据分析：多元统计方法
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
J. Brink
中科院分区：
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作者：
C. Bücker;R. Jarrard;T. Wonik;J. Brink
南极罗斯海北部McMin-Tio湾的Ahslract。在维多利亚陆盆西缘，应用C-P-212A钻井液，通过ZI~110Ie测井、WCLL测井提供了全面、全面的地质测量资料，研究了新近系至L新近系的构造演化过程。[中英文摘要]我S介绍了L的多元统计方法：L，L。两种主要类型的多变量统计方法各有不同的视角：(1)因子分析被用作根据物理和化学特性对钻井序列进行分类的客观工具。系数测井反映了基本的地质控制(即颗粒大小。孔隙度。粘土矿物学)在测量的地球物理性质背后，从而使它们更容易在地质上解释。(2)测井曲线的聚类分析将相似的井下地球物理性质归为一类。圈定个别测井或沉积单位。这些客观和独立定义的单位，或统计电相。有助于区分岩性和沉积学特征(如粒度、物源)。因子分析和聚类分析的多元统计方法被证明是快速、可靠和客观地描述CRP-212A井下地球物理性质的有力工具。从而得到了与气候学发现相一致的解释。
Ahslract In the northern McMin-tIo Sound (Ross Sea, Antarctica). the CRP-212A drillhole tar~etccl the western margin of the Victoria Land Basin to investigate Neogcne to l'alaeogene elin~atic and tectonic Ilistory by o b t i ~ i ~ i i ~ ~ g conti~ii~oiis core Z I I I ~ ~iowii110Ie logs, Wcll logging of ('RI'-212A has provided a complete and comprehensive datasct of in ¥iil geopliysical measurements. i s e r describes l e v 1 1 t i o 1 I i~ i te rpre t~ t io~i f l o w i l o l e l o g c 1 1 1 inultivariate statistical methods. Two major types of multivariate statistical methods were each yielding a different perspective: (1) Factor analysis was used as an objective tool for classification of the drilled sequence based on physical and chemical properties. The factor logs arc mirroring the basic geological controls (i.e.. grain size. porosity. clay mineralogy) behind the measured geophysical properties, thereby making them easier to interpret geologically. (2) Cluster analysis of the logs groups similar downhole geophysical properties into one cluster. delineating individual loggingoor sedimentological units. These objectively and independently defined units, or statistical electrofacies. are helpful in differentiating lithological and sedimentological characterisations (e.g. grain size, provenance). The multivariate statistical methods of factor and cluster analysis proved to be powerful tools for fast, reliable, and objective characterisation of downhole geophysical properties at CRP-212A. resulting in interpretations which are consistent with scclimentological findings.