差异散射多次波自适应消减法研究
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摘要
在海上地震资料处理过程中,反射多次波和散射多次波同时存在于地震资料中。由于散射多次波相对于反射多次波的能量弱,且具有时空非稳态特征,难以在常规SRME方法中去除,影响进一步的数据分析工作。将含有这两种多次波的地震数据进行分离并分别做SRME多次波预测,通过自适应衰减方法有效地匹配不同类型多次波,尤其是非稳态的散射多次波。通过sigsbee2B模型的试算,经对比理想无多次波影响的地震数据资料,表明该方法可以有效地同时消除反射多次波和差异散射多次波。
In marine seismic data processing,both reflective and diffractive multiple waves exsist in seismic data.Because the energy of diffractive multiple wave is weaker than reflective multiple wave and shows nonstationary characteristics,it is difficult to remove in conventional SRME method,which affects the following data analysis.The authors separate the seismic data with the two kinds of multiple waves,predict multiple waves using SRME,and finally match different multiple waves,especially nonstationary diffractive multiple waves through adaptive subtraction method.Testing of Sigsbee 2B model shows that reflective and different diffractive multiple waves can be eliminated effectively at the same time compared with the ideal infinite-model data without multiple waves.
In marine seismic data processing,both reflective and diffractive multiple waves exsist in seismic data.Because the energy of diffractive multiple wave is weaker than reflective multiple wave and shows nonstationary characteristics,it is difficult to remove in conventional SRME method,which affects the following data analysis.The authors separate the seismic data with the two kinds of multiple waves,predict multiple waves using SRME,and finally match different multiple waves,especially nonstationary diffractive multiple waves through adaptive subtraction method.Testing of Sigsbee 2B model shows that reflective and different diffractive multiple waves can be eliminated effectively at the same time compared with the ideal infinite-model data without multiple waves.
引文
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[2]韩佳君,韩立国,巩向博,等.基于波动理论的近地表散射噪音衰减[J].世界地质,2010,29(2):310-322.HAN Jia-jun,HAN Li-guo,GONG Xiang-bo,et al.At-tenuation of near-surface scattering noise based on wavetheory[J].Global Geology,2010,29(2):310-322.
[3]Harlan W S,Claerbout J F,Rocca F.Signal/noise sepa-ration and velocity estimation[J].Geophysics,1984,49:1869-1880.
[4]Khaidukov V,Landa E,Moser T.Diffraction imaging byfocusing-defocusing:an outlook on seismic superresolu-tion[J].Geophysics,2004,69:1478-1490.
[5]刘琦.基于反射、散射波场分离的多次波消除方法研究:硕士学位论文[D].长春:吉林大学,2009.LIU Qi.Multiple elimination study base on wavefieldsseparation between the relecting and scattering:master'sdegree thesis[D].Changchun:Jilin University,2009.
[6]Taner M T.Simplan:similated plane-wave exploration[C].46th Ann Internat Mtg,Soc Expl Geophys,Ex-panded Abstracts,1976:186,187.
[7]Fomel S.Applications of plane-wave destruction filters[J].Geophysics,2002,67(6):1946-1960.
[8]Taner M T,Fomel S.Separation and imaging and seis-mic diffractions using plane-wave decomposition[C].SEG Technical Program Expanded Abstract,2006:2401-2405.
[9]Verschuur D J.Surface-related multiple removal in seis-mic data by a data driven methodology[OL].Recentdevelopments in seismic exploration.http://www,uam,2009.gr/lectures/25.pdf,2009.
[10]肖二莲,陈瑜,万欢.SRME多次波衰减方法在海洋地震资料中的应用[J].地球物理学进展,2010,25(3):1057-1064.XIAO Er-lian,CHEN Yu,WAN Huan.Surface-relatedmultiple elimination on marine seismic data[J].Pro-gress in Geophysics,2010,25(3):1057-1064.
[11]Wiggins I W.Attenuation of complex water-bottom mul-tiples by wave-equation-based prediction and subtraction[J].Geophysics,1988,53(3):1527-1539.
[12]Van Groenestijn G J A,Verschuur D J.Estimation pri-maries by sparse inversion and application to near-offsetdata reconstruction[J].Geophysics,2009,74(3):23-28.
[13]Tikhonov A N.Solution of incorrectly formulated prob-lems and the regularization method[M].Doklady:So-viet Mathematics,1963:1035-1038.
[14]Fomel S.Adaptive multiple subtraction using regularizednonstationary regression[J].Geophysics,2009,74(1):25-33.
[15]Fomel S.Shaping regularization in geophysical-estima-tion problems[J].Geophysics,2007,72(2):29-36.
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