| 瞬变电磁拟地震子波宽度压缩研究 |
| |
| 引用本文： | 薛国强,李貅,戚志鹏,范涛,周楠楠.瞬变电磁拟地震子波宽度压缩研究[J].地球物理学报,2011,54(5):1384-1390. |
| |
| 作者姓名： | 薛国强 李貅 戚志鹏 范涛 周楠楠 |
| |
| 作者单位： | 1. 中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所, 北京 100029;
2. 长安大学地质工程与测绘学院,西安 710054 |
| |
| 基金项目： | 国家自然科学基金面上项目，国家自然科学重点基金，中国科学院知识创新工程重要方向项目 |
| |
| 摘 要： | 导电媒质中电磁场所满足的扩散方程与无耗媒质中电磁场所满足的无阻尼波动方程之间存在着数学转换关系式,可以实现瞬变电磁法拟地震资料解释.但是转换出的虚拟波往往波形较宽,使分辨能力下降,影响了瞬变电磁拟地震方法的发展和推广.本文针对虚拟波形展宽这一现象进行了研究,认为虚拟波形展宽的原因,不是由于波在介质中传播时能量损耗所致,...
|
| 关 键 词： | 瞬变电磁场 波场变换 压缩波形 反褶积 |
| 收稿时间： | 2010-05-15 |
Study of sharpening the TEM pseudo-seismic wave-form |
| |
| XUE Guo-Qiang,LI Xiu,QI Zhi-Peng,FAN Tao,ZHOU Nan-Nan.Study of sharpening the TEM pseudo-seismic wave-form[J].Chinese Journal of Geophysics,2011,54(5):1384-1390. |
| |
| Authors: | XUE Guo-Qiang LI Xiu QI Zhi-Peng FAN Tao ZHOU Nan-Nan |
| |
| Institution: | 1. Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2. College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054,China |
| |
| Abstract: | Because of the relationship between diffusion field of electromagnetic wave in conductive medium and electromagnetic wave equation in lossless medium,transient electromagnetic (TEM) method pseudo-seismic technology can be realized and wavelet can be transformed accordingly. But the transformed virtual wave is often with wide waveform, which reduces the resolution and affects the development and promotion of pseudo-seismic method. In this paper, we studied waveform broadening phenomena of virtual wave. Firstly, we discussed the reasons for virtual waveform broadening phenomena, pointed out that it is not due to the energy loss when wave propagates in the medium, but because that the propagation velocity of virtual wave in the virtual medium is much smaller than the velocity of electromagnetic wave propagating in the physical medium. Secondly, we put forward an idea that uses deconvolution technology to eliminate the waveform broadening effect in the wave-field transformation. We also computed and processed several known models and achieved good results which proved that the TEM method pseudo-seismic technology can enhance the capacity of TEM method to identify the underground electrical interface so that makes the transient electromagnetic method in fine exploration possible. |
| |
| Keywords: | Transient electromagnetic field Wave-field transformation Sharpen wave-form De-convolution |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《地球物理学报》浏览原始摘要信息 |
| 点击此处可从《地球物理学报》下载免费的PDF全文 |
|
