• 责任者：Qi Zhipeng (Institute of Geological Engineering and Surveying ; Chang’an University ; Xi’an 710054 ; China) ; Li Xiu
• 刊名：Chinese Journal of Geophysics
• 出版年：2013
• 卷期：56(10)
• 关键词：瞬变电磁法 ; transient electromagnetic methods
• 页码：p.3581-3595
• 图表：22 illus., 2 tables, 45 refs.
• 分类号：1600
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

     The wavefield conversion is a useful way to achieve pseudo-seismic interpretation for Transient Electromagnetic Method （TEM）. We adopt the precondition regularization conjugate gradient method to realize the full-domain wavefield transformation from diffusion equation to wave equation. The over relaxation pre-conditioned process effectively reduces the condition number of the coefficient matrix, while Regularized Conjugate Gradient Method （RCG） helps run the inverse transformation of wave-field in full time-domain. The comparison between the results of inverse transformation and the known wave-field functions shows that the algorithm is stable and reliable. Comparison of the results with those of previously proposed sectionalized regularizationshows that the method in this paper is very effective. Combined with the algorithm of inverse transformation, we analyse the characteristics of the virtual wave-field for layered earth models and summarize its propagation properties. The wave-field transformation of the survey data processing results illustrates the effect of the practical application of this method.