| 关于频率电磁测深几个问题的探讨（一）——从可控源音频大地电磁测深原理看解释中的问题 |
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| 引用本文： | 陈明生. 关于频率电磁测深几个问题的探讨（一）——从可控源音频大地电磁测深原理看解释中的问题[J]. 煤田地质与勘探, 2012, 40(5): 63-66. DOI: 10.3969/j.issn.1001-1986.2012.05.016 |
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| 作者姓名： | 陈明生 |
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| 作者单位： | 1.中煤科工集团西安研究院, 陕西 西安 710077 |
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| 摘 要： | 从频率电磁测深原理出发,说明了人工源频率测深的电磁场存在3个场区,也只有远区场的可控源音频大地电磁测深(CSAMT)法的资料才能用音频大地电磁测深(AMT)法进行反演解释。对于存在中近区的CSAMT法资料,可进行近场校正,然后按AMT法解释。由于近场校正是建立在均匀半空间模型之上,校正误差大。为此提出了不加校正直接对比值视电阻率数据进行反演解释,最好按电磁场单分量资料解释,以减少不必要的校正误差。
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| 关 键 词： | 音频大地电磁测深 可控源音频大地电磁测深 比值视电阻率 近场校正 电磁场单分量 |
| 收稿时间： | 2011-10-30 |
Problem of date interpretation from the view of principle of controlled-source audio-frequency magnetotellurics |
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| CHEN Mingsheng. Problem of date interpretation from the view of principle of controlled-source audio-frequency magnetotellurics[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(5): 63-66. DOI: 10.3969/j.issn.1001-1986.2012.05.016 |
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| Authors: | CHEN Mingsheng |
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| Affiliation: | 1.Xi'an Research Institute, China Coal Technology&Engineering Group Corp, Xi'an 710077, China |
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| Abstract: | The paper, from the principle of frequency souding, ilustrates that there are three field zones for frequency souding of artificil source, far-field data of controlled-source audio-frequency magnetotellurics (CSAMT) were interpreted by audio-frequency magnetotellurics (AMT). After data in near-fied has ben corrected, it is interpreted by AMT. Because near-field conrrection is based on homogeneous half-space mode,so correction error is bigger. Therefor,it is presented that data of ratio apparent risistivity without correction or data of single component of electromagnetic field are directly interpreted by inversion. |
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| Keywords: | Audio-frequency magnetotellurics controlled-source audio-frequency magnetotellurics ratio apparent resistivity near-field conrrection single component of electromagnetic fied |
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