三维试射射线追踪子三角形法

地震波的射线追踪方法在地震资料处理中有着广泛的应用，而且射线追踪的精度和计算效率直接决定着资料处理的质量和效率。所以不断改进射线追踪方法一直是人们的研究热点。人们普遍认为，试射法是解决两点射线追踪的一种快速、精确的方法。在此基础上，本文运用三角形的面积坐标，提出了几种试射追踪方法：单纯形法，细分三角形法，分割三角形法和子三角形法。研究表明子三角形法平均试射次数最少，而且收敛快，精度最高。文中给出的三维射线追踪实例及理论研究证明：试射修正时采用对射线的方向分量修正比直接对试射角度修正的效果要好。

3-D Shooting Ray-Tracing Sub-Triangle Method

Ray traeing method of seismic wave has wide applieation in seismic data processing and its precision and computational efficiency directly determine the quality of data processing. Therefore,constantly improving the ray-tracing method has always been the human's studied hot spot. Generally, the pcople considered that shooting method is rapid and accurate method for solving ray-tracing problem between two points. On that basis , using area coordinate of triangle, the paper presented several shooting ray-tracing methods:simplicity method,triangle sub division method , triangle partition method and sub triangle method. The studied results showed that the sub triangle method is characteristics of fower shooting numbers, rapid convergence and high precision. The 3-D ray-tracing theoretical studies and real cases presented by the paper showed that using correction of directional components of shooting has better results by comparison with direct correction of shooting angles when shooting correction is carried out.