| 基于ANSYS的套管对EM-MWD信号传输的影响分析 |
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| 引用本文： | 邵春,付信信,褚志伟. 基于ANSYS的套管对EM-MWD信号传输的影响分析[J]. 探矿工程(岩土钻掘工程), 2015, 42(12): 6-8 |
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| 作者姓名： | 邵春 付信信 褚志伟 |
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| 作者单位： | 中国地质大学(武汉)资源学院,中国地质大学（武汉）资源学院,中国地质大学（武汉）资源学院 |
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| 摘 要： | 评价电磁波随钻测量(EM-MWD)信号传输效果,不可忽视套管对信号传输的影响,而套管对信号传输影响极为复杂,很难用数学模型进行全面分析。基于此,采用ANSYS有限元软件,对EM-MWD在套管中信号传输进行建模仿真,从地面电流密度及接收信号压差方面,分析套管对EM-MWD信号传输影响规律。仿真结果表明:绝缘短节出套管,套管对信号起引导作用,反之,套管对信号起屏蔽作用;低电阻率钻井液对EM-MWD在套管中的信号传输影响大。
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| 关 键 词： | 电磁波随钻测量；信号传输；套管；钻井液；仿真 |
| 收稿时间： | 2015-10-23 |
| 修稿时间： | 2015-10-25 |
Analysis on the Influence Rule of Casing on EM-MWD Signal Transmission Based on ANSYS |
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| SHAO Chun,FU Xin-xin and CHU Zhi-wei. Analysis on the Influence Rule of Casing on EM-MWD Signal Transmission Based on ANSYS[J]. Exploration Engineering （Rock & Soil Drilling and Tunneling）, 2015, 42(12): 6-8 |
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| Authors: | SHAO Chun FU Xin-xin CHU Zhi-wei |
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| Affiliation: | Faculty of Earth Resources, China University of Geosciences,Faculty of Earth Resources, China University of Geosciences,Faculty of Earth Resources, China University of Geosciences |
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| Abstract: | The influence of casing can not be ignored for evaluating the transmission effect of EM-MWD signal, and it is difficult to analyze this effect with mathematical models because of the casing's extremely complicated effects. Therefore, modeling and stimulation of EM- MWD signal transmission in the casing were made by ANSYS finite element software to analyze the influence rule of casing on EM-MWD signal transmission in the aspects of ground current density and ground receiver voltage. The stimulation results show that the casing plays a guiding role to the signal when insulation nipple is out of the casing, and conversely, the casing has a shielding effect on the signal; low resistivity drilling fluid has a great influence on EM-MWD signal transmission in the casing. |
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| Keywords: | electromagnetic measurement while drilling (EM-MWD) signal transmission casing drilling fluid simulation |
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