天然气地球科学 ›› 2009, Vol. 20 ›› Issue (4): 581–585.doi: 10.11764/j.issn.1672-1926.2009.04.581

• 天然气地球物理勘探 • 上一篇    下一篇

小波束叠前深度偏移与照明分析

张恩嘉, 王西冲, 梁栋, 唐小彪   

  1. 成都理工大学信息工程学院,四川 成都 610059
  • 收稿日期:2008-11-20 修回日期:2009-04-27 出版日期:2009-08-10 发布日期:2009-08-10
  • 通讯作者: 张恩嘉zhangejia@163.com E-mail:zhangejia@163.com

Beamlet Pre-stack Depth Migration and Illumination Analysis

ZHANG En-Jia, WANG Xi-Chong, LIANG Dong, TANG Xiao-Biao   

  1. College of Information Engineering, Chengdu University of Technology, Chengdu 610059, China
  • Received:2008-11-20 Revised:2009-04-27 Online:2009-08-10 Published:2009-08-10

摘要:

利用小波束域波场分解和传播在空间和方向上的双重局域性,将小波束域波场依据相应的外推公式进行延拓,最终应用成像条件求取成像值。在地质目标处选取多个成像点,可以得到面向目标的控制照明偏移成像,在多个层位上选取多个成像点进行控制照明叠前深度偏移,可以得到整块区域的成像。 针对Marmousi模型的试算结果表明小波束偏移的有效性及其在提高计算效率方面的巨大优势。通过照明,选择面向目标的有效照明小波束,进行部分小波束偏移,可以提供更好的成像质量和计算效率。

关键词: 小波束, 控制照明, 叠前深度偏移, 照明分析

Abstract:

Based on the localization properties of wavefield decomposition and propagation in the beamlet domain, and according to relevant extrapolation formula, the beamlet domain is implemented, and finally imaging values are computed using image-forming condition. By selecting multiple imaging points at geologic targets, the target-oriented controlled illumination migration imaging can be gained, and by selecting multiple imaging points on multiple horizons to control illumination prestack depth migration, the image of the whole area can be acquired. The test results of Marmousi model shows that the method has a great advantage in improving the efficiency of computing. We can select the target oriented effective illumination beamlet to accomplish some part of beamlet migration, thus imaging quality and the efficiency of computing can be better.

Key words: Beamlet, Controlled illumination, Prestack depth migration, Illumination analysis.

中图分类号: 

  • TE132.1+4

[1]Gabor D.Theory of communication[J]. Inst. Elec. Eng.,1946,93:429-457.
[2] Daubechies I. The wavelet transform:Time-frequency localization and signal analysis[J].IEEE Trans.on Information Theory,1990,36(5):961-1005.
[3]Berkhout A J.Areal shot-record technology[J].Journal of Seismic Exploration,1992,1 (3): 251-264. 
[4] 张叔伦,孙佩勇. 基于平面波合成的傅立叶有限差分叠前深度偏移[J].石油地球物理勘探,1999,34(1):1-7.  
[5] Tygel M,Leykam A, Hubral P, et al. Transforming a point source seismogram into a beam seismogram[ J ] . Geophysics,1991,56 (11) :1819-1824. 
[6] Sun Y H,Qin F H,Checkles  S, et al. 2-D prestack Kirchhoff beam migration for depth imaging[J].Geophysics,2000,65:1592-1603.
[7] Wu R S, Wang Y, Gao J. Beamlet migration based on local perturbation theory[C]//70th Annual Internat . SEG Mtg Expanded (Abstracts), 2000:1008-1011. 
[8] 陈凌. 小波束域波场的分解、传播及其在地震偏移成像中的应用[ D].北京: 中国地震局地球物理研究所,2002.  
[9] 陈凌,吴如山,陈颙.基于Gabor-Daubechies小波束域波场外推的散射系数矩阵的计算及其应用[J]. 地球物理学报,2004,47 (2) :289-298. 
[10]Wu R S,Chen L.Beamlet migration using Gabor-Daubechies frame propagator[C]//63rd Conference&Technical Exhibition, EAGE,Expanded (Abstracts), 2001 :74.
[11]Wu R S,Chen L. Directional illumination analysis using beamlet decomposition and propagation [J] . Geophysics,2006,71(4) : S147-S159.
[12]Rietveld W E A,BerkhoutA J. Prestack depth migration by means of controlled illumination[J].Geophysics, 1994, 59 (5) : 801- 809.
[13] 冯伟,王华忠,吴如山,等. 面向目标控制照明的合成波源偏移[J].石油物探,2004,43(3):223-228. 
[14] 张建伟, 鲁烈琴, 强芳青, 等.二维叠前深度偏移连片处理及成像建模技术[J] .天然气地球科学,2003,14(3):203-206.
[15] 蔡刚,屈志毅.构造复杂地区地震资料速度和成图方法研究与应用[J].天然气地球科学,2005,16(2):246-249.

 

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