| 用阻抗相位识别二维音频大地电磁垂向异常 |
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| 引用本文： | 周军,王闻文,刘红,李东北,李英勇.用阻抗相位识别二维音频大地电磁垂向异常[J].物探化探计算技术,2014(3):273-277. |
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| 作者姓名： | 周军 王闻文 刘红 李东北 李英勇 |
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| 作者单位： | 成都理工大学地球探测与信息技术教育部重点实验室;成都奥塔科技有限公司;重庆一三六地质队;四川省地质工程勘察院; |
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| 基金项目： | 国家自然科学基金(41274078) |
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| 摘 要： | 从原理上分析了音频大地电磁阻抗相位在静位移和垂向电性异常体影响下的变化特性,并采用二维有限元方法进行了正演模拟。考虑到阻抗相位在静位移和真实垂向异常中的响应差异,认为利用阻抗相位开展综合解释对于识别二维垂向电性异常具有十分积极的意义。理论模型计算和工程实例表明,基于阻抗相位的综合解释方法对于识别二维垂向电性异常具有较好的应用效果。
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| 关 键 词： | 音频大地电磁测深 阻抗相位 静态位移 垂向异常 |
Vertical anomaly interpretation of 2D audio magnetotelluric using the impedance phase |
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| Institution: | ZHOU Jun, WANG Wen-wen, LIU Hong, LI Dong-bei, LI Ying-yong (1. Chengdu University of Technology, Chengdu 610059, China; 2. Alta Scientific Company Ltd. , Chengdu 610091, China; 3. Chongqing 136 Geology Team, Chongqing 401147, China; 4. Sichuan Institute of Geological Engineering Investigation, Chengdu 610072, China) |
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| Abstract: | For the identification problem of vertical geoelectric anomalies in the audio magnetotelluric sounding,from the princi-ple,we analyze the variation characteristic of impedance phase under the influence of static displacement and vertical electrical abnormal body.At the same time,we use two-dimensional finite element method for forward simulation and analysis the re-sponse of impedance phase.Considering its response differences in the static shift and true vertical anomalies,we think that it haspositive significance to use impedance phase for vertical anomalies interpretation,and achieved good application effect in the practical work. |
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| Keywords: | audio magnetotelluric sounding impedance phase static shift vertical anomaly |
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