| 井筒套管对井间电磁成像测井信号传输的影响 |
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| 引用本文： | 陆洪, 刘菊, 陈林如. 井筒套管对井间电磁成像测井信号传输的影响[J]. 电波科学学报, 2012, 27(4): 754-759. |
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| 作者姓名： | 陆洪 刘菊 陈林如 |
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| 作者单位： | 中国电波传播研究所, 山东 青岛 266107 |
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| 摘 要： | 通过模拟柱状三层介质中电磁波传播特性,得到了井筒套管对井间传输的电磁信号的影响。将发射天线看作位于无限长圆柱形井筒套管中央的垂直磁偶极子,井筒套管内外是分布均匀的柱状三层介质,把电磁场用磁赫兹矢量位表示,推导了各个区域的电磁场积分表达式,利用数值积分计算了不同情况下的电磁场分布,分析了井筒套管电导率(材料)、厚度及测井工作频率对井间电磁成像测井信号的影响。
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| 关 键 词： | 井间电磁成像 井筒套管 磁偶极子 磁赫兹矢量 |
| 收稿时间： | 2011-11-09 |
Influence of wellbore casing on crosswell electromagnetic tomography signal |
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| LU Hong, LIU Ju, CHEN Linru. Influence of wellbore casing on crosswell electromagnetic tomography signal[J]. CHINESE JOURNAL OF RADIO SCIENCE, 2012, 27(4): 754-759. |
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| Authors: | LU Hong LIU Ju CHEN Linru |
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| Affiliation: | China Research Institute of Radiowave Propagation, Qingdao Shandong 266107, China |
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| Abstract: | Effect on crosswell electromagnetic signal is achieved by simulating electromagnetic wave propagation characteristic in three layered cylindrical medium.Transmitting antenna is considered as vertical magnetic dipole located at the center of infinite long cylindrical wellbore casing,three layered homogeneous cylindrical medium surrounding the hole.Electromagnetic field is denoted with magnetic hertz vector,integral expression of electromagnetic field is deduced.Finally,electromagnetic field is computed by numerical integral,and the influence of casing conductivity(material),casing thickness,and frequency on the well logging signal is analyzed. |
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| Keywords: | crosswell electromagnetic tomography wellbore casing vertical magnetic dipole magnetic Hertz vector |
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