| TTI介质中波传播的伪谱法折叠效应的消除方法研究 |
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| 引用本文： | 轩义华,秦成岗,赵仁永,张忠涛,丁琳,李小平.TTI介质中波传播的伪谱法折叠效应的消除方法研究[J].物探化探计算技术,2007,29(6):473-476. |
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| 作者姓名： | 轩义华 秦成岗 赵仁永 张忠涛 丁琳 李小平 |
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| 作者单位： | 中海石油(中国)有限公司深圳分公司,广州,510240 |
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| 摘 要： | 在弹性波传播问题的研究中,伪谱法是一种很好的模拟方法。该法的最大优点是节省存储空间,运算速度优于其它方法。但是伪谱法也存在一定的问题,由于折叠效应的影响,普通的吸收边界条件不能达到良好的效果。所以,这里采用一种"反周期延拓"与普通吸收边界相结合的新办法,用来消除折叠效应和边界反射的影响,并在TTI介质的伪谱法正演模拟中加以应用。模拟结果表明,这种新的方法能有效地达到消除伪谱法正演模拟过程中所产生的折叠效应,具有一定的推广价值。
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| 关 键 词： | TTI介质 伪谱法 反周期延拓 折叠效应 普通吸收边界 |
| 文章编号： | 1001-1749（2007）06-0473-04 |
| 修稿时间： | 2007-03-21 |
Wraparound elimination technique for the pseudospectral wave synthesis in TTI media |
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| XUAN Yi-hua,QIN Cheng-gang,ZHAO Ren-yong,et al..Wraparound elimination technique for the pseudospectral wave synthesis in TTI media[J].Computing Techniques For Geophysical and Geochemical Exploration,2007,29(6):473-476. |
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| Authors: | XUAN Yi-hua QIN Cheng-gang ZHAO Ren-yong |
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| Abstract: | Pseudospectral wave synthesis is a good simulate method in the study of elastic wave propagation. The most important virtues of pseudospectral wave synthesis are save storage space and precede operation speed. Because of the influence for wraparound,ordinary absorb boundary condition can,however,not achieve ideal effect. In this paper, we adopt a new method,by combining antiperiodic extension of the wavefield with common absorb boundary method,to eliminate the impact of waparound and boundary reflection.At the same time,we apply this new method in pseudospectral forward simulation of TTI media and simulation results show that this new method effectively eliminate the wraparound in forward simulation. And,which implies the potential prospect of the method. |
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| Keywords: | TTI media pseudospectral wave synthetic antiperiodic extension wraparound common absorb boundary |
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