| 大地电磁资料偏移成像 |
| |
| 引用本文： | 宋维琪,邹文勇.大地电磁资料偏移成像[J].地震学报,2005,27(1):102-108. |
| |
| 作者姓名： | 宋维琪 邹文勇 |
| |
| 作者单位： | 中国山东东营,257061,石油大学(华东)地球资源与信息学院;中国山东东营,255075,中石化胜利油田地质科学研究院 |
| |
| 摘 要： | 在研究Zhdanov的二维电磁场偏移成像的基础上， 针对它在某些方面的不足， 研究并提出了改进算法. 首先， 用一维反演结果确定初始背景电阻率， 然后在延拓计算过程中， 利用迭代算法进行逐层修正、 延拓计算， 从而获得较准确的电阻率； 第二， 研究了有限差分方程的改进算法， 根据大地电磁场变化的特点， 设计了纵向以等比级数变网格的迭代算法. 通过以上两方面技术的改进， 经理论模型和实际资料试算验证， 取得了较好的结果.
|
| 关 键 词： | 大地电磁资料 有限差分法 数值计算 偏移成像 |
| 文章编号： | 0253-3782(2005)01-0102-07 |
| 修稿时间： | 2003年2月13日 |
A NEW METHOD OF MIGRATION AND IMAGING FOR MT DATA |
| |
| Song Weiqi Zou Wenyong Earth Resources and Information Institute,University of Petroleum,Dongying ,China Geoscience Research Institute of Shengli Oil field,China Petroleum Chemical Corporation,Dongying ,China.A NEW METHOD OF MIGRATION AND IMAGING FOR MT DATA[J].Acta Seismologica Sinica,2005,27(1):102-108. |
| |
| Authors: | Song Weiqi Zou Wenyong Earth Resources and Information Institute University of Petroleum Dongying China Geoscience Research Institute of Shengli Oil field China Petroleum Chemical Corporation Dongying China |
| |
| Institution: | Song Weiqi 1) Zou Wenyong 2) 1) Earth Resources and Information Institute,University of Petroleum,Dongying 257061,China2) Geoscience Research Institute of Shengli Oil field,China Petroleum Chemical Corporation,Dongying 255075,China |
| |
| Abstract: | Based on the study on electromagnetic field migration by Zhdanov, we have proposed an improved method for the weak points in the research. Firstly, the initial background resistivity is determined by using 1 D inversion results. Then in the process of continuation, the results are corrected and calculated layer by layer by the iteration method, so that more exact resistivity can be obtained. Secondly, an improved algorithm for finite difference equation is studied. According to the property of electromagnetic migration field, the algorithm is designed by means of grids varying with geometric progression in the longitudinal direction. Being improved by the techniques mentioned above, better results are obtained by the new method, which has been verified by both the theory model and practical data. |
| |
| Keywords: | MT data finite difference method numerical calculation migration imaging |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《地震学报》浏览原始摘要信息 |
| 点击此处可从《地震学报》下载免费的PDF全文 |
|
