APPLICATION OF X-RAY FLUORESCENCE ELEMENT LOGGING IN SD OILFIELD
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摘要:
哈萨克斯坦南图尔盖盆地咸海以东的SD油田SD-35井在钻探过程中，由于钻井工艺的改进，导致录井过程中岩屑细小，使常规录井手段来划分地层存在技术性难题。X射线荧光元素录井中的特征元素含量的变化趋势可以用来识别岩性，划分地层。基于SD-35井的岩心、岩屑特征元素含量与岩性的相关性关系，认为1 437.0~1 464.0 m井段的地层中Si、Al、Mg、K、S、Co、Cd、Ti等元素含量的变化趋势与底部变质石英岩的整体趋势一致，对比性强，结合其他资料分析识别出其岩性为具有部分风化性质的变质石英岩。研究结果表明，X射线荧光元素录井技术可作为录井岩性识别的新的手段，同时可为地层的定量解释评价提供技术方面的支撑。
Abstract:The Well of SD-35 was drilled in the SD oilfield of the South Turgay Basin of Kazakhstan which is located in the east of the Aral Sea. Improvement of drilling technology has made cuttings smaller in mud logging process, which results in difficulties to make stratigraphic classification with conventional mud logging means. The change tendency of the characteristic element content in the X-ray fluorescence element logging can be used as a tool to identify lithology and classify strata. Based on the correlation between characteristic element content and the lithology from the cores and cuttings of Well SD-35, it is revealed that the change tendency of the Si, Al, Mg, K, S, Co, Cd, Ti elements in the interval of 1437.0-1464.0m is similar with that of the metaquartzite of the bottom, and there is a strong correlation. Therefore, the lithology is identified as metaquartzite with partly weathering associated with other data. The results show that the X- ray fluorescence element technique can be used as a new mean to mud logging and lithology identification and a new technical support for the quantitative stratigraphic interpretation and evaluation.
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Key words:
- X-ray fluorescence element logging /
- lithology identification /
- Kazakhstan /
- Aral Sea /
- metaquartzite
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