微焦点X射线计算机层析（CMT）及其在石油研究领域的应用
X-Ray Computed Micro-tomography(CMT) and Its Application to Petroleum Research
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摘要: 工业微焦点CT的X射线源焦点尺寸小于5微米,成象分辨率明显优于常规焦点CT。在石油勘探开发研究中;微焦点CT在许多技术领域进行了应用,取得了崭新的成果:(1)确定岩心的基本物理参数—计算和描绘密度、孔隙度、流体饱和度分布;(2)描述岩心的微观特征—直观描述岩石内部孔隙结构和流体分布特征;(3)特殊油藏岩心分析评价—观察碳酸岩、火成岩等内部一些常规技术无法获得的特征;(4)岩心驱替和提高采收率分析—重建油水在岩心内部的宏观分布状态;(5)其他方面的应用—岩心筛选、地层伤害评价、岩石力学评价等。Abstract: The image resolution of industrial X-ray computed microtomography (CMT)with focal spot of X-ray source less than 5 micrometer is quite better than that of conventional focal spot CT.In petroleum exploration and development research computed microtomgraphy was used to many technological areas with revolutionary achievements: (1) determination of the basic petrophysical properties of cores - calculating and illustrating distribution of buck density, porosity and fluid saturation; (2) imaging of micro- scopic porous ofrock- intuitive describing micro-structure of porous and oil-water distribution in porous; (3) evaluatian of special lithological reservoir cores- investigating characteristics of cabonatite mogatic rock etc., that can not be done by conventional methods, (4) analysis of core flooding and enhanced oil recov- reconstructing macroscopical distribution of oil and water in cores, (5) application of other aspects: screening core, evaluation offormation damage, evaluating rock mechanical properties of cores, and so on.
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Keywords:
- microfocus X-ray /
- CT /
- petroleum
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