| 饱水和排水过程中岩石电阻率各向异性特征的电阻率成像法研究 |
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| 引用本文： | 周启友,杭悦宇,刘汉乐,戴水汉,徐建平.饱水和排水过程中岩石电阻率各向异性特征的电阻率成像法研究[J].地球物理学报,2009,52(1):281-288. |
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| 作者姓名： | 周启友 杭悦宇 刘汉乐 戴水汉 徐建平 |
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| 作者单位： | 1.南京大学地球科学系、水科学系，南京 210093;2.江苏省中国科学院植物研究所，南京 210014 |
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| 基金项目： | 教育部留学回国人员科研启动基金，国家自然科学基金 |
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| 摘 要： | 从电阻率的角度研究岩石裂隙介质的各向异性特征是一种方便而有效的方法，但多限于空间单个点上的测量数据分析.通过在砂岩岩样上的饱水与排水实验以及同步进行的高密度电阻率成像监测，探讨了应用高密度电阻率成像法获得图像研究岩石各向异性特征的可能性，分析了饱水与排水过程中岩石电阻率在不同方向上的响应特性.结果表明，电阻率成像法在分析岩石裂隙介质的各向异性方面具有多方向成像和动态监测的优点，可以通过对不同方向上获得的电阻率图像的分析，提取出岩石沉积结构的空间分布模式，清晰地反映出岩石在饱水和排水过程中电阻率变化空间分布模式的各向异性特征.
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| 关 键 词： | 岩石电阻率 各向异性特征 电阻率成像法 饱水过程 排水过程 |
| 收稿时间： | 2008-1-1 |
| 修稿时间： | 2008-10-26 |
The anisotropic properties of rock resistivity during saturation and desaturation processes revealed by electrical resistivity tomography |
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| ZHOU Qi-You,HANG Yue-Yu,LIU Han-Le,DAI Shui-Han,XU Jian-Ping.The anisotropic properties of rock resistivity during saturation and desaturation processes revealed by electrical resistivity tomography[J].Chinese Journal of Geophysics,2009,52(1):281-288. |
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| Authors: | ZHOU Qi-You HANG Yue-Yu LIU Han-Le DAI Shui-Han XU Jian-Ping |
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| Institution: | 1.Department of Hydrosciences, Nanjing University, Nanjing 210093,China;2.Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014,China |
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| Abstract: | With electrical resistivity parameter, it is convenient and effective to analyze the anisotropic properties of fractured rocks. However, only resistivity data obtained at individual points were used for this analysis now. Based on water saturation and desaturation experiments made on a sandstone block and simultaneous monitoring with high density electrical resistivity tomography (ERT), in this paper we investigated the possibility of using resistivity images from the ERT to study the anisotropic properties of the rock, and analyzed the responses of rock resistivity measured at different directions to the water saturation and desaturation processes. The results indicate that as the ERT has a advantage of being able to multi-directional imaging and monitor, on the basis of a analysis of resistivity images obtained at different directions, it is possible to characterize the spatial distribution patterns of the rock structure, and illustrate the anisotropic properties of the spatial distribution patterns in the rock resistivity changes during water saturation and desaturation processes. |
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| Keywords: | Rock resistivity Anisotropic properties Electrical resistivity tomography Saturation process Desaturation process |
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