Elastic Wavefield Simulation Using Separated Equations Through Pseudo-Spectral Method
详细信息
- 责任者：Tang Xiaoping (Xi’an Center of Geology Survey ; China Geology Survey ; Xi’an 710054 ; China) ; Bai Chaoying
- 刊名：Oil Geophysical Prospecting
- 出版年：2012
- 卷期：47(1)
- 关键词：波场分离 ; wavefield separate ; 弹性波 ; elastic waves
- 页码：p.19-26
- 图表：9 illus., 20 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
Based on the first order wave equation separation,the similar formula for second-order wave equation separation method is deduced in this paper,which has a simple form and easy derivation over the original one.The separated first-and se-cond-order wave equation is solved with regular-and staggered-grid pseudo-spectral method.As a result,the P and S wavefield can be obtained directly.Comparing with the first-order and the second-order pseudo-spectral method,and separation and non-separation method,our results show that the first-order and second-order pseudo-spectral methods have same effect in wavefield simulation,but first-order one is good at the traveltime picking,while the second-order one is advantageous over the first-order one in terms of the wavelet amplitude preservation,waveform protection and wavefield separation.The wavefiled separation simulation method has more flexible usage in computation projection.
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