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...

基于压缩感知的高分辨率平面波分解方法研究

DOI: 10.6038/cjg20140920, PP. 2946-2960

Keywords: 平面波分解,压缩感知(CS),线性Radon变换(LRT),加权匹配追踪(WMP)

Full-Text   Cite this paper   Add to My Lib

Abstract:

平面波分解方法是地震资料处理中的一项关键技术,它广泛地运用在平面波偏移、各类Beam偏移等成像方法中.平面波分解不仅可以提高偏移成像的效率,而且可以压制地震资料中的随机噪音,提高地震数据的信噪比.线性Radon变换(LRT)是一种常见的实现平面波分解的方法,但常规的LRT存在以下两个缺点:(1)分辨率受测不准原理限制;(2)变换结果存在很多噪音和空间假频.为了克服LRT的上述缺点,本文提出一种基于压缩感知的高分辨率平面波分解方法,并利用加权匹配追踪(WMP)技术实现了该方法.该方法将LRT视为一个参数估计问题,并将LRT结果的稀疏性作为约束条件,在压缩感知理论的指导下利用WMP方法得到高分辨率、高信噪比的平面波分解结果.另外,该方法还可以用于提取地震数据的线性信号、压制随机噪音、实现高维地震数据规则化等地震资料处理技术.数值实验结果证明:WMP方法可以有效地提取地震数据中的线性信号,提高LRT的分辨率和信噪比,从而改善平面波分解的质量.

References

[1]  Beylkin G. 1987. Discrete radon transform. IEEE Transactions on Acoustics, Speech and Signal Processing, 35(2): 162-172.
[2]  Capon J. 1969. High-resolution frequency-wavenumber spectrum analysis. Proceedings of the IEEE, 57(8): 1408-1418.
[3]  Cary P W. 1998. The simplest discrete Radon transform. 1998 SEG Annual Meeting, Society of Exploration Geophysicists: 1999-2002.
[4]  Chen L, Wu R S, Wang W J. 2004. Common angle image gathers obtained from gabor-daubechies beamlet prestack depth migration. Chinese J. Geophys. (in Chinese), 2004, 47(5): 876-885.
[5]  Chen S C, Cao J Z, Ma Z T. 2003. A method of plane wave depth migration for pre-stack seismic data. Chinese J. Geophys. (in Chinese), 46(6): 821-826.
[6]  Feng B, Wang H Z. 2011. 3D offset plane-wave finite-difference pre-stack time migration. Chinese J. Geophys. (in Chinese), 54(11): 2916-2925.
[7]  Gao F, Zhang P, Wang B, et al. 2006. Fast Beam migration-a step toward interactive imaging. 2006 SEG Annual Meeting, Society of Exploration Geophysicists: 2470-2473.
[8]  Hampson D. 1986. Inverse velocity stacking for multiple elimination. 1986 SEG Annual Meeting, Society of Exploration Geophysicists: 44-55.
[9]  Herrmann P, Mojesky T, Magesan M. 2000. Amplitude Preserving Radon Demultiple. Offshore Technology Conference: OTC-12008-MS.
[10]  Hu J, Wang X, Wang H. 2012. Beam Forming by Least Square Inversion with Radon Spectrum Constraints. 2012 SEG Annual Meeting, Society of Exploration Geophysicists: PAPR1140.
[11]  Hu T Y, Hong F, Wang R Q, et al. 2002. Multiple attenuation using beamforming onshore and offshore China. The Leading Edge, 21(9): 906-910.
[12]  Ma B, Wang H Z. 2011. 3D offset plane-wave finite-difference pre-stack time migration. Chinese Journal of Geophysics (in Chinese), 54(11): 2916-2925.
[13]  ?zbek A. 2000. Adaptive beamforming with generalized linear constraints. 2000 SEG Annual Meeting, Society of Exploration Geophysicists: 2081-2084.
[14]  Sacchi M D, Ulrych T J. 1995. High-resolution velocity gathers and offset space reconstruction. Geophysics, 60(4): 1169-1177.
[15]  Thorson J R, Claerbout J F. 1985. Velocity-stack and slant-stack stochastic inversion. Geophysics, 50(12): 2727-2741.
[16]  Wang X, Wang H Z, Zhou D H, et al. 2011. Minimizing Ellipsoidal Norm Seismic Data Interpolation with Radon Spectrum Constraints. 73rd EAGE Conference & Exhibition: A046.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133