| 地震波走时计算的逆风差分算法 |
| |
| 引用本文： | 熊金良,李国发,王濮,何兵寿.地震波走时计算的逆风差分算法[J].物探化探计算技术,2004,26(4):295-298. |
| |
| 作者姓名： | 熊金良 李国发 王濮 何兵寿 |
| |
| 作者单位： | 1. 石油大学,地球科学系,北京,102249
2. 中国矿业大学,北京,100083 |
| |
| 摘 要： | 快速精确地旅行时计算在地震资料的叠前偏移与层析反演中起重要作用。利用逆足差分格式求解程函方程，首先在波阵面上寻找全局极小点，然后计算该点周围各点的地震波初至走时，同时，采用局部算法以确保计算的稳定性。该算法对于任意复杂地质模型都具有较高的精度。
|
| 关 键 词： | 走时 地震波 叠前偏移 差分算法 层析反演 程函方程 地震资料 全局极小点 差分格式 求解 |
| 文章编号： | 1001-1749(2004)04-0295-04 |
| 修稿时间： | 2003年6月9日 |
UPWIND FINITE-DIFFERENCE SOLUTION OF EIKONAL EQUATION |
| |
| XIONG Jin-liang,LI Guo-fa,WANG Pu,He Bing-shou.UPWIND FINITE-DIFFERENCE SOLUTION OF EIKONAL EQUATION[J].Computing Techniques For Geophysical and Geochemical Exploration,2004,26(4):295-298. |
| |
| Authors: | XIONG Jin-liang LI Guo-fa WANG Pu He Bing-shou |
| |
| Institution: | XIONG Jin-liang~1,LI Guo-fa~2,WANG Pu~2,He Bing-shou~2 |
| |
| Abstract: | Traveltime calculation plays an important role in many methods of seismic data processing such as pre-stack migration and tomography. In this paper, seismic traveltime is computed efficiently on a regular grid by an unwind finite-difference method of eikonal equation. The method searches the global minimum traveltime point along the expanding wavefront and then computes the traveltime of points adjacent to this point. To ensure the stability of arithmetic, a local method is applied to the computed point. The algorithm is stable and reasonably accurate for a variety of velocity models with moderate to large velocity contrast and very complex structures. |
| |
| Keywords: | seismic traveltime eikonal equation finite-difference upwind scheme |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
