石油地球物理勘探2009，Vol.44Issue(5)：637-641,5.
虚谱法-阶应力-速度方程地震数值模拟
Pseudo spectral seismic simulation with one order stress-velocity equation
杜增利 1李亚林 2尹成 1高宏亮3
作者信息
- 1. 川庆钻探工程有限公司地球物理勘探公司,四川成都,610213
- 2. 成都理工大学,四川成都,610059
- 3. 西南石油大学,四川成都,610500
- 折叠
摘要
Abstract
Seismic wave field simulation is an effective method to correctly understand the spreading mechanism and the wave field characteristic for seismic wave in complex conditions. Staggered mesh high order difference is often used in one order stress-velocity acoustic equation seismic simulation, however the numerical dispersion caused by the algorithm can not be avoided. By using all information in model space and applying Fourier transformation to wave field function, accurate wave field space derivative is obtained in the Pseudo spectral method, as in this method the restriction to high frequency was overcame, the seismic wave field simulation with full frequency bandwidth was realized. With the use of perfected matched layers condition in Pseudo spectral seismic simulation, the reflection wave from artificial boundary can be eliminated efficiently, and the seismic wave penetrating process can be better and accurately simulated. In this paper the numerical test shows that simulation results with pseudo spectral method one order stress-velocity equation has good resolution in time domain and it has high calculating efficiency with the same simulation precision.关键词
正演模拟/虚谱法/应力-速度方程/地震波场/数值频散/完美匹配层Key words
forward simulation/ pseudo spectral method/ stress-velocity equation/ seismic wave field/ numerical dispersion/ perfected matched layers分类
天文与地球科学引用本文复制引用
杜增利,李亚林,尹成,高宏亮..虚谱法-阶应力-速度方程地震数值模拟[J].石油地球物理勘探,2009,44(5):637-641,5.
