论文详情

交错网格在伪谱法弹性波场数值模拟中的应用

石油物探

2012年 51卷第No. 5期

阅读：73

Title

Application of staggered grids in elastic wavefield modeling by pseudo-spectral method

单位

1.中国地质大学(北京)能源学院,北京100083；2.中国石化国际石油勘探开发有限公司,北京100083；3.中原油田社

会统筹中心,河南濮阳457001；4.中原油田消防支队应急救援九大队,河南濮阳457001；5.中原石油化工有限责任公

司,河南濮阳457001

Organization

Wu Baonian,College of Resources,China University of Geosciences (Beijing),Beijing 100083,China

摘要

为消除伪谱法弹性地震波场数值模拟中因数值计算产生的干扰伪波，分析了伪谱法弹性波场数值计算产生干

扰伪波的原因，提出在伪谱法弹性波场数值模拟时引入交错网格，采用中心网格和交错网格联合计算的方式(即:采

用交错网格计算一阶导数，采用中心网格计算二阶导数)来克服波场计算过程中的数值振荡现象。模型计算结果表

明，该方法可以有效消除伪谱法模拟波场中的干扰伪波，使波场计算值稳定、准确、可靠。

Abstract

In order to eliminate the interfere pseudo-wave caused by numerical computation in the elastic wavefield modeling by

pseudo-spectral method,we analyzed the reasons leading to the phenomena,and introduced staggered grids into elastic

wavefield modeling by pseudo-spectral method.The numerical oscillation in wavefield modeling is overcome by joint

computation of central grids and staggered grids (first-order spatial derivative is calculated by staggered grids and second-

order spatial derivative is calculated by central grids).Model testing result indicates that the method can effectively remove

the interfere pseudo-wave and make the modeling result stable,accurate and reliable.

关键词：

波场模拟; 伪谱法; 交错网格; 弹性波动方程;

Keywords:

wavefield modeling; pseudo-spectral method; staggered grids; elastic wave equation;

基金项目

DOI

10.3969/j.issn.1000-1441.2012.05.003