【摘要】 作者在文中对三维任意界面情况下的两点间射线追踪问题进行了研究 ,从 Fermat原理出发 ,对射线路径上的旅行时 ,采用一阶 Taylor不完全展开等办法 ,推出了三维情况下计算射线路径的整体迭代算法。并通过模型计算证明了本方法的稳健性以及计算的高精确度和高效率。为三维结构下地震偏移和层析成像提供了一种可行的射线追踪方法。更多还原

【Abstract】 In this paper, two point ray tracing is studied for three-dimensional arbitrary interface. from Fermat’s principle, traveltime is expanded in the initial ray path according to one order Taylor’s incompletion expansion. Then, the algorithm of total iterative ray tracing in three dimension is derived. Numerical tests based on this method in three dimensional media show that this algorithm is fast, well-posed and high efficient. It offers a new kind of efficient ray tracing method for three dimensional seismic migration and tomography.更多还原