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...

各向异性介质qP波传播描述II:分离纯模式标量波

DOI: 10.6038/cjg20141025, PP. 3389-3401

Keywords: 伪纯模式波动方程,波型分离,波矢量,偏振矢量,投影偏差

Full-Text   Cite this paper   Add to My Lib

Abstract:

在各向异性地震波场中,qP波与qS波常常是耦合在一起的.多分量地震数据处理中一个关键环节就是波型分离(即模式解耦),以纵波成分为主的常规单分量地震数据的成像则需要合理描述标量qP波的传播算子.本文作者曾构建了在运动学上同弹性波动方程等价,动力学上突出标量qP波的伪纯模式波动方程.为了彻底消除qS波残余,本文根据波矢量与qP波偏振矢量之间的偏差,提出从伪纯模式波场提取纯模式标量qP波的方法.数值分析展示了投影偏差算子在波数域和空间域的特征.基于不同复杂程度理论模型的试验结果表明,联合"伪纯模式传播算子"与"投影偏差校正"可为各向异性介质分离模式波场传播过程提供一种简便的描述工具.

References

[1]  Aki K, Richards P G. 2002.Quantitative Seismology.2nd ed.University Science Books.
[2]  Cheng J B, Kang W, Wang T F. 2012. Description of qP-wave propagation in anisotropic media, Part I: Pseudo-pure-mode wave equations. Chinese J. Geophys. (in Chinese), 56(10): 3474-3486.
[3]  Cheng J B, Fomel S. 2014.Fast algorithms forelastic-wave-mode separation and vector decomposition using low-rank approximation for anisotropic media. Geophysics, 79(4): C97-C110.
[4]  Li Y K, Cui Z Z. 1994.P- and S-waves separated by polarization revolving method. Chinese J. Geophys. (in Chinese), 37(Suppl.2): 372-382.
[5]  Li Z Y, Liang G H, Gu B L. 2013.Improved method of separating P- and S-waves using divergence and curl. Chinese J. Geophys. (in Chinese), 56(6): 2012-2022.
[6]  Liu F Q, Morton S A, Jiang SS, et al. 2009.Decoupled wave equations for P and SV waves in an acoustic VTI media. //79th Annual International Meeting.SEG, Expanded Abstracts, 2844-2848.
[7]  Pestana R C, Ursin B, Stoffa P L. 2011.Separate P- and SV-wave equations for VTI media. //81st Annual International Meeting.SEG, Expanded Abstracts, 163-167.
[8]  Alkhalifah T. 2000.An acoustic wave equation for anisotropic media.Geophysics, 65(4):1239-1250.
[9]  Cheng J B, Kang W. 2012.Propagating pure wave modes in 3D general anisotropic media, Part I: P-wave propagator. // Expanded Abstracts of 82nd Ann. Internat.Mtg., Soc. Expl.Geophys., 616-621.
[10]  Cheng J B, Kang W. 2014.Simulating propagation of separated wave modes in general anisotropic media, Part I: qP-wave propagators. Geophysics, 79(1): C1-C18.
[11]  Chu C L, Macy B K, Anno P D. 2011.An accurate and stable wave equation for pure acoustic TTI modeling. //81st Annual International Meeting.SEG, Expanded Abstracts, 179-184.
[12]  Dellinger J. 1989.Anisotropic seismic wave propagation.Stanford, CA:Stanford University.
[13]  Dellinger J, Etgen J. 1990.Wave-field separation in two-dimensional anisotropic media. Geophysics, 55(7):914-919.
[14]  Feng X, Zhang X W, Liu C, et al. 2011.Separating P-P and P-SV wave by parabolic Radon transform with multiple coherence. Chinese J.Geophys. (in Chinese), 54(2): 304-309.
[15]  Fletcher R P, Du X, Fowler P J. 2009.Reverse time migration in tilted transversely isotropic (TTI) media. Geophysics, 74(6):WCA179-WCA187.
[16]  Grechka V, Zhang L B, Rector J W. 2004.Shear waves in acoustic anisotropic media. Geophysics, 69(2):576-582.
[17]  Hu T Y, Zhang G J, Zhao W et al. 2004.Decomposition of multicomponent seismic wavefileds. Chinese J. Geophys. (in Chinese), 47(3): 504-508.
[18]  Kang W, Cheng J B. 2011a. New coupled wave equations of P and SV wave for reverse time migration in TI media.// 73nd EAGE Conference & Exhibition incorporating SPE EUROPEC 2011, P267.
[19]  Kang W, Cheng J B. 2011b.Prestack scalar reverse time migration of elastic seismic data in TI media. //Expanded Abstracts of 81st Ann. Internat.Mtg., Soc. Expl.Geophys., 3367-3371.
[20]  Kang W, Cheng J B. 2012.Propagating pure wave modes in 3D general anisotropic media, Part II: SV and SH wave. //Expanded Abstracts of 82nd Ann. Internat.Mtg., Soc. Expl.Geophys., 1234-1239.
[21]  Rommel B E. 1994.Approximate polarization of plane waves in a medium having weak transverse isotropy.Geophysics, 59(10): 1605-1612.
[22]  Tao C H, He Q D, Wang X C. 1993.Separation of wave typesfrom 3-C data of 3-D anisotropy. Geophysical Prospecting for Petroleum (in Chinese), 32(4):45-50.
[23]  Thomsen L. 1986.Weak elastic anisotropy. Geophysics, 51(10):1954-1996.
[24]  Tsvankin I D, Chesnokov E M. 1990.Synthesis of bodywave seismograms from point sources in anisotropic media. Journal of Geophysical Research, 95(B7): 11317-11331.
[25]  Tsvankin I. 2005.Seismic signatures and analysis of reflection data in anisotropic media.2nd ed. Elsevier Science Publ. Co., Inc.
[26]  Yan J, Sava P. 2011.Improving the efficiency of elastic wave-mode separation for heterogeneous tilted transverse isotropic media. Geophysics, 76(4): T65-T78.
[27]  Yao D Z, Zhou X X, Zhong B S. 1993.Method for separating out P-wave or S-wave in VSP data, and its application. Oil Geophysical Prospecting (in Chinese), 28(5): 623-628.
[28]  Zhang G Q, Zhou H B. 1995.Separating compressional wave from shear wave in surface seismic records. Oil Geophysical Prospecting (in Chinese), 30(2): 181-191.
[29]  Zhang H Z, Zhang G Q, Zhang Y. 2009.Removing S-wave noise in TTI reverse time migration.// 79th Annual International Meeting.SEG, Expanded Abstracts, 2849-2853.
[30]  Zhang Q S, McMechan G A. 2010.2D and 3D elastic wavefield vector decomposition in the wavenumber domain for VTI media. Geophysics, 75(3): D13-D26.
[31]  Zhang Y, Zhang H Z, Zhang G Q. 2011.A stable TTI reverse time migration and its implementation. Geophysics, 76(3): WA3-WA11.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133