三维层状地质结构下整体迭代射线追踪法  

TOTAL ITERATIVE RAY TRACING IN 3-D LAYERED STRUCTURE

作　　者：赵谊[1] 高尔根[1] 刘同庆[2] 史进良 谢端[1] 

机构地区：[1]中国科技大学地球与空间科学系 [2]安徽省地质科学研究所,合肥230001

出　　处：《物探化探计算技术》2001年第2期105-108,175,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：黑龙江省自然科学基金! G980 3

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。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.

关 键 词：三维层次地层结构 整体迭代 射线追踪 任意界面 地震学 地震勘探 

分 类 号：P631.4[天文地球—地质矿产勘探]