Study of the long bipole and large power electromagnetic field
文献类型：期刊论文
| 作者 | Di Qing-Yun; Wang Miao-Yue; Wang Ruo; Wang Guang-Jie |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2008-11-01 |
| 卷号 | 51期号:6页码:1917-1928 |
| 关键词 | Earth-ionosphere mode Long bipole Large power Large offset Electromagnetic field Numerical simulation |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | Generally, the geoelectrical structure of the earth's crust and upper mantle only is considered in electromagnetic exploration. However, for a long bipole source (approximately several tens kilometers long), the effect of the ionosphere on the electromagnetic (EM) field should be taken into account when observations are carried out at a very remote locations far away from the source (several thousand kilometers). Especially, the configuration which includes the ionosphere, the atmosphere and the earth, called the "earth-ionosphere" case, should be considered. However, there are only a small number of publications related to this problem. In our study, we analyze first the electromagnetic field excited by an electric dipole within the traditional control source electromagnetic (CSEM) configuration using the integral equation method. We consider a three-layer model of the earth-ionosphere media. The modeling results closely match the half-space analytical data, since the effect of the ionosphere for this small scale bipole source is negligible. This confirms that the integral equation method is a reliable and effective method for modeling earth-Ionosphere media. We examine the EM fields' behavior in the model of the complicated earth-ionosphere media with the field excited by a long bipole source in the far-field and wave-guide zones. We model the decaying properties of electromagnetic fields for three-layer earth-ionosphere model considering a 50 km long current bipole source. Due to the influence of the ionosphere, the earth-ionosphere EM fields, excited by a long bipole source has an extra wave-guide zoned where the field behavior is very different from the far field zone. We also model the EM fields for multi-layer models typical for continental shield and platform with 50 km long bipole and 200 A current source. and for the petroleum reservoir model including the ionosphere layer that is 100 km thick. and an air layer with the same thickness using a bipole that is 50 km in length. The modeling results show that the targets can still be easily identified in the earth-Ionosphere EM fields with a very large offset (more than 1000 km). |
| WOS关键词 | INDUCED POLARIZATION ; EXPLORATION ; APPROXIMATION ; INVERSION ; EARTH ; BORN ; AREA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000261313500035 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69406]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Di Qing-Yun |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Di Qing-Yun,Wang Miao-Yue,Wang Ruo,et al. Study of the long bipole and large power electromagnetic field[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2008,51(6):1917-1928. |
| APA | Di Qing-Yun,Wang Miao-Yue,Wang Ruo,&Wang Guang-Jie.(2008).Study of the long bipole and large power electromagnetic field.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,51(6),1917-1928. |
| MLA | Di Qing-Yun,et al."Study of the long bipole and large power electromagnetic field".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 51.6(2008):1917-1928. |
入库方式： OAI收割
来源：地质与地球物理研究所
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