| 科学钻探中的元素测井技术 |
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| 引用本文： | 李舟波,王祝文.科学钻探中的元素测井技术[J].地学前缘,1998,5(1):119-130. |
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| 作者姓名： | 李舟波 王祝文 |
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| 作者单位： | 长春科技大学 |
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| 摘 要： | 系统地介绍了科学钻探中应用自然伽玛能谱测井、活化测井、热中子俘获伽玛能谱测井和中子非弹性散射伽玛能谱测井确定元素含量的原理和方法；详细讨论了在不同的岩性条件下如何选择和建立从元素含量向矿物成分转换的模型。最后，介绍了元素测井技术在ＫＴＢ和ＯＤＰ中的应用，说明元素测井技术对重建岩性剖面、了解元素丰度和矿物成分的变化、研究矿物在高温高压下蚀变所涉及的地球化学作用、显示岩石的不均匀性和重建地球化学剖面等方面有特殊作用。此外，元素测井技术对于精确计算骨架密度、孔隙度和渗透率、井与井间相关对比，以及补足由于漏掉岩芯或岩屑而失去的有关信息，均具有重要作用。
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| 关 键 词： | 科学钻探 元素测井 元素矿物转换 |
TECHNIQUE OF ELEMENTAL LOGGING IN SCIENTIFIC DRILLING PROJECT |
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| Li Zhoubo\ \ Wang Zhuwen.TECHNIQUE OF ELEMENTAL LOGGING IN SCIENTIFIC DRILLING PROJECT[J].Earth Science Frontiers,1998,5(1):119-130. |
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| Authors: | Li Zhoubo\ \ Wang Zhuwen |
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| Abstract: | The technique of elemental logging is a general designation of a set of nuclear logging for measuring in situ the element concentrations in formation and transferring them to the mineral contents. This paper has made a fully introduction to the principles and methods of natural gamma ray logging, activation logging, thermal neutron capture spectrometry and induced neutron gamma ray inelastic scatter spectrometry to determine the element concentration in scientific drilling project. And a detail discussion has been made for how to select and establish the models of transform relations from element concentrations to mineral contents in accordance with the geological lithostratigraphy. Finally, some application examples of the elemental logging technique in the KTB and ODP are presented. It is indicated that the elemental logging technique may play an important role in the following fields: the reconstruction of lithological section, the research of the variation about element concentrations and mineral contents, the study on the geochemical process of mineral alteration in the condition of high temperature and high pressure, the identification of lithological inhomogeneity, and the reconstruction of geochemical section, etc. Furthermore, the elemental logging technique can also be used to derive accurately the porosity and permeability from the calculation of the matrix density, to make correlation between wells, and to provide the lost information resulted from the incomplete coring or cutting collection, etc. |
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| Keywords: | scientific drilling project elemental logging transformation from element concentration to mineral contents |
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