| 基于显微CT图像的岩芯孔隙分形特征 |
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| 引用本文： | 方黎勇,段建华,陈浩,陈鹏,孟伟荣,谌恬.基于显微CT图像的岩芯孔隙分形特征[J].强激光与粒子束,2015,27(5):059003. |
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| 作者姓名： | 方黎勇 段建华 陈浩 陈鹏 孟伟荣 谌恬 |
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| 作者单位： | 1.电子科技大学 航空航天学院, 成都 61 1 731 ; |
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| 摘 要： | 采用国内自主开发的高分辨率显微CT设备,对岩芯样本进行图像采集,运用数字图像分析方法获得图像中的岩芯孔隙目标,并以此为基础重建三维模型。然后基于分形理论,分别从二维图像和重建的三维模型角度计算孔隙的分形维数。最后,再采用基于多孔介质的分形模型对岩芯孔隙分形特征进行验证,得出岩芯的二维分形维数和三维分形维数之间的差值均值为1.000 3,最大偏差为0.004,很好地满足多孔介质分形模型中关于二维和三维分形维数的关系。
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| 关 键 词： | 显微CT图像 岩芯孔隙 分形维度 多孔介质模型 |
| 收稿时间： | 2014-09-22 |
Fractal characteristics of core pore based on micro-CT images |
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| Institution: | 1.School of Aeronautics &Astronautics,University of Electronic Science and Technology of China,Chengdu 611731,China;2.College of Management Science,Chengdu University of Technology,Chengdu 610059,China;3.Institute of Applied Electronics,CAEP,Mianyang 621900,China;4.School of Mathematical Sciences,University of Electronic Science and Technology of China,Chengdu 611731,China |
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| Abstract: | The micro-CT has been an increasingly important tool in researching core pore structure. In this study, a domestically self-developed high-resolution micro-CT equipment is used to capture the CT images of a core sample. Based on the results from digital image analysis of pore core CT images, this paper reconstructs a three-dimensional model of core pore. Then fractal dimension of two-dimension image and three-dimension reconstructed model are calculated based on fractal theory. Finally, the fractal characteristics between the two-dimension image and the three-dimension reconstructed model of the sample are verified by fractal model of porous media. Wherein, the mean difference between the two-dimensional fractal dimension and the three-dimensional fractal dimension is 1.000 3, and the maximum deviation is 0.004. The results well satisfy the relations between the two-dimension and the three-dimension fractal dimension of the fractal model of porous media. |
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