| 用伪谱法合成零偏移距地震记录 |
| |
| 引用本文： | 张文生,何樵登,李树勇.用伪谱法合成零偏移距地震记录[J].吉林大学学报(地球科学版),1998(4). |
| |
| 作者姓名： | 张文生 何樵登 李树勇 |
| |
| 作者单位： | 中国科学院计算数学与科学工程计算研究所，长春科技大学 |
| |
| 摘 要： | 零偏移距地震记录是叠后偏移的基础，常用射线追踪法来制作，但当介质复杂时，射线会出现交叉现象，对三维情况计算量更大。从二维标量波动方程出发，用伪谱法研究了零偏移距地震记录的合成，给出了不同情况下的数值计算公式，并对边界吸收问题作了有效处理。数值计算结果表明了方法的正确性和有效性。该方法可用于偏移中正演模拟的快速计算，且易推广到三维情形。
|
| 关 键 词： | 伪谱法 正演 零偏移距记录 反周期扩展法 |
USING THE PSEUDOSPECTRAL METHOD TO SYNTHESIS ZERO OFFSET SEISMIC RECORD |
| |
| Zhang Wensheng ,He Qiaodeng ,Li Shuyong.USING THE PSEUDOSPECTRAL METHOD TO SYNTHESIS ZERO OFFSET SEISMIC RECORD[J].Journal of Jilin Unviersity:Earth Science Edition,1998(4). |
| |
| Authors: | Zhang Wensheng He Qiaodeng Li Shuyong |
| |
| Institution: | Zhang Wensheng 1),He Qiaodeng 2),Li Shuyong |
| |
| Abstract: | The zero offset seismic record is a base for poststack migration. Usually, it is aecomplished by the ray tracing method, however, rays may cross for a complicated media, and computation is time consuming for a 3 D case. In the paper, basing on the 2 D scalar wave equation, we study the synthesising problem of zero offset section with the pseudospectral method. Not only we give the numerical computation formulae for different cases, but also solve the boundary absorbing problem effectively. Numerical calculations show the correctness and effectiveness of methods. So we supply a rapid modelling method for migration, we also can extend it to three dimensions case easily. |
| |
| Keywords: | pseudospectral method zero offset record forward modelling anti periodic extension method |
| 本文献已被 CNKI 等数据库收录！ |
