全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

单程波算子地震波入射角计算

DOI: 10.6038/cjg20130323, PP. 953-960

Keywords: 单程波方法,入射角,角道集

Full-Text   Cite this paper   Add to My Lib

Abstract:

基于单程波深度延拓方法,发展了一种地震波入射角度计算方法.入射角度的计算仅利用简谐波场,可得到整个成像区域内所有点的入射波波前面方向.该方法具有较高的计算效率,可服务于合成角道集等深度偏移方法;与偏移算法相比,其计算量几乎可以忽略.与射线法或基于走时梯度的入射角度计算方法相比,本文方法更稳健,避免了速度场的微小变化导致的入射角较大变化,因此更适用于实际偏移速度模型,也与波动方程深度偏移方法更匹配.数值算例表明,本文方法既有较高的计算效率又有很好的精度,且有很好的稳定性.

References

[1]  张辉, 王成祥, 张剑锋. 基于单程波方程的角度域照明分析. 地球物理学报, 2009, 52(6): 1606-1614. Zhang H, Wang C X, Zhang J F. One-way wave equation based illumination analysis in angle domain. Chinese J. Geophys. (in Chinese), 2009, 52(6): 1606-1614.
[2]  de Bruin C G M, Wapenaar C P A, Berkhout A J. Angle-dependent reflectivity by means of prestack migration. Geophysics, 1990, 55(9): 1223-1234.
[3]  Liu L N, Zhang J F. 3D wavefield extrapolation with optimum split-step Fourier method. Geophysics, 2006, 71(3): T95-T108.
[4]  Zhang J F, Liu L N. Optimum split-step Fourier 3D depth migration: Developments and practical aspects. Geophysics, 2007, 72(3): S167-S175.
[5]  Wapenaar K, Goudswaard J, van Wijngaarden A J. Multi-angle, multi-scale inversion of migrated seismic data. The Leading Edge, 1999, 18(8): 928-932.
[6]  Berkhout A J, Ongkeihong L, Volker A W F, et al. Comprehensive assessment of seismic acquisition geometries by focal beams-Part 1: Theoretical considerations. Geophysics, 2001, 66(3): 911-917.
[7]  Zhang Y, Xu S, Bleistein N, et al. True-amplitude, angle-domain, common-image gathers from one-way wave-equation migrations. Geophysics, 2007, 72(1): S49-S58.
[8]  Biondi B, Symes W W. Angle-domain common-image gathers for migration velocity analysis by wavefield-continuation imaging. Geophysics, 2004, 69(5): 1283-1298.
[9]  Kuhl H, Sacchi M D. Least-squares wave-equation migration for AVP/AVA inversion. Geophysics, 2003, 68(1): 262-273.
[10]  ? erveny V. Seismic Ray Theory. Cambridge: Cambridge University Press, 2001.
[11]  Claerbout J F. Toward a unified theory of reflector mapping. Geophysics, 1971, 36(3): 467-481.
[12]  张剑锋, 卢宝坤, 刘礼农. 波动方程深度偏移的频率相关变步长延拓方法. 地球物理学报, 2008, 51(1): 222-228. Zhang J F, Lu B K, Liu L N. Frequency-dependent varying-step depth extrapolation scheme for wave equation based migration. Chinese J. Geophys. (in Chinese), 2008, 51(1): 222-228.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133