利用地震瑞利波速度反演求取P-SV波横波静校正量
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摘要
在多波多分量地震勘探中,P-SV波横波静校正量的求取至今仍然十分困难。本文借鉴Muyzert的方法原理,提出利用陆上P-SV波地震资料中的瑞利波频散信息反演浅层横波速度结构,进而求取P-SV波的横波静校正量。但是在实施反演之前要对P-SV波资料先做高程静校正和纵波静校正。文中详细列出求取横波静校正量的流程。通过实际二维P-SV波地震资料试验表明,利用地震瑞利波的频散信息可有效地反演浅层横波速度结构,并可预测P-SV波横波静校正量的长波长趋势。
In multi-wave and multi-component seismic exploration, it has been very difficult to compute S-wave statics of P-SV wave up-to-now. Aid by the principle of Muyzert approach, the paper presented using dispersion information of Rayleigh wave in land seismic P-SV wave data to invert shallow S-wave velocity structure, and then compute S-wave statics of P-SV wave. The paper listed in detail the flow chart computing S-wave statics. It is shown by the test of practical 2-D seismic P-SV wave data that using the dispersion information of seismic Rayleigh wave can effectively invert the S-wave shallow velocity structure and predict the long wavelength trend of S-wave statics of P-SV wave.
In multi-wave and multi-component seismic exploration, it has been very difficult to compute S-wave statics of P-SV wave up-to-now. Aid by the principle of Muyzert approach, the paper presented using dispersion information of Rayleigh wave in land seismic P-SV wave data to invert shallow S-wave velocity structure, and then compute S-wave statics of P-SV wave. The paper listed in detail the flow chart computing S-wave statics. It is shown by the test of practical 2-D seismic P-SV wave data that using the dispersion information of seismic Rayleigh wave can effectively invert the S-wave shallow velocity structure and predict the long wavelength trend of S-wave statics of P-SV wave.
引文
[1]Tatham R H,McCormack MD.Multicomponent Seis-mology in Petroleum Exploration.Tulsa:Society of Exploration Geophysicists,1991
[2]Armin WS.Determination of converted-wave statics u-sing P refractions together with SV refractions.Ex-panded Abstracts of61st SEG Mtg,1991,1413～1415
[3]Cary P W,Eaton D W.Asi mple method for resolving large converted-wave(P-SV)statics.Geophysics,1993,58(3):429～433
[4]Muyzert E.Scholte wave velocity inversion for a near surface S-velocity model and PS-statics.Expanded Ab-stracts of70th SEG Mtg,2000,1197～1200
[5]Yanpeng Li.A new method for converted wave statics correction.Expanded Abstracts of72nd SEG Mtg,2002:979～981
[6]Aki K,Richards P G.Quantitative seismology.New York:Freeman H W,San Francisco,1980
[7]朱介寿.地震学中的计算方法.北京:地震出版社,1988
[8]杨成林.瑞利波勘探.北京:地质出版社,1993
[9]Xia J H,Miller R D,Park C B.Esiti mation of near-surface shear-wave velocity by inversion of Rayleigh waves.Geophysics,1999,64(3):692～700
[10]Allnor R et al.Inversion of seismic surface waves for shear wave velocities.Expanded Abstracts of67th SEG Mtg,1997,1921～1924
[11]裴江云,吴永刚,刘英杰.近地表低速带反演.长春地质学院学报,1994,24(3):317～326
[12]曾校丰,钱荣毅,邓新生等.油气反射波地震勘探记录中面波信息的提取.物探与化探,2001,25(6):443～446
[13]Haskell N A.The dispersion of surface wave on multilayered media.Bulletin of the Seismological Society of America,1953,43:17～34
[14]Schwab F.Surface-wave dispersion computations:Knopoff's method.Bulletin of the Seismological Society of America,1970,60:1491～1520
[15]Schwab F,Knopoff L.Fast surface wave and free mode computations.Methods in Computational Physics,1972,2:87～180
[16]Dunkin J W.Computation of modal solutions in layered elastic media at high frequencies.Bulletin of the Seismological Society of America,1965,55:335～358
[17]Buchen P W,Ben-Hador R.Free-mode surface-wave computations.Geophys J Int,1996,124:869～887
[18]Abo-Zena A.Dispersion function computations for unli mited frequency values.Geophys J R Astr Soc,1979,58:91～105
[19]Menke W.Comment on“Dispersion function com-putations for unli mited frequency values”by Anas Abo-Zena.Geophys J R Astr Soc,1979,95:315～323
[20]Kennett B L N,Kerry N J.Seismic waves in a stratified Halfspace.Geophys.J R Astr Soc,1979,57:557～583
[21]Rix G J,Leipski E A.Accuracy&resolution of surface wave inversion.Geotechnical Special Publi-cation,1991,11:17～32
[22]肖柏勋.高模式瑞雷面波及其正反演研究[博士学位论文].长沙:中南大学,2000
[23]Yamanaka H,Ishida H.Application of genetic algo-rithms to aninversion of surface-wave dispersion da-ta.Bulletin ofthe Seismological Society of Ameri-ca,1996,86(2):436～444
[24]Park C B,Miller R D,Xia J H.I maging disper-sion curves of surface waves on multi-channel re-cord.Expanded Abstracts of68th SEG Mtg,1998:1377～1380
[25]Mari J L.Esti mation of static corrections for shear-wave profiling using the dispersion properties of Love waves.Geophysics,1984,49(8):1169～1179
[2]Armin WS.Determination of converted-wave statics u-sing P refractions together with SV refractions.Ex-panded Abstracts of61st SEG Mtg,1991,1413～1415
[3]Cary P W,Eaton D W.Asi mple method for resolving large converted-wave(P-SV)statics.Geophysics,1993,58(3):429～433
[4]Muyzert E.Scholte wave velocity inversion for a near surface S-velocity model and PS-statics.Expanded Ab-stracts of70th SEG Mtg,2000,1197～1200
[5]Yanpeng Li.A new method for converted wave statics correction.Expanded Abstracts of72nd SEG Mtg,2002:979～981
[6]Aki K,Richards P G.Quantitative seismology.New York:Freeman H W,San Francisco,1980
[7]朱介寿.地震学中的计算方法.北京:地震出版社,1988
[8]杨成林.瑞利波勘探.北京:地质出版社,1993
[9]Xia J H,Miller R D,Park C B.Esiti mation of near-surface shear-wave velocity by inversion of Rayleigh waves.Geophysics,1999,64(3):692～700
[10]Allnor R et al.Inversion of seismic surface waves for shear wave velocities.Expanded Abstracts of67th SEG Mtg,1997,1921～1924
[11]裴江云,吴永刚,刘英杰.近地表低速带反演.长春地质学院学报,1994,24(3):317～326
[12]曾校丰,钱荣毅,邓新生等.油气反射波地震勘探记录中面波信息的提取.物探与化探,2001,25(6):443～446
[13]Haskell N A.The dispersion of surface wave on multilayered media.Bulletin of the Seismological Society of America,1953,43:17～34
[14]Schwab F.Surface-wave dispersion computations:Knopoff's method.Bulletin of the Seismological Society of America,1970,60:1491～1520
[15]Schwab F,Knopoff L.Fast surface wave and free mode computations.Methods in Computational Physics,1972,2:87～180
[16]Dunkin J W.Computation of modal solutions in layered elastic media at high frequencies.Bulletin of the Seismological Society of America,1965,55:335～358
[17]Buchen P W,Ben-Hador R.Free-mode surface-wave computations.Geophys J Int,1996,124:869～887
[18]Abo-Zena A.Dispersion function computations for unli mited frequency values.Geophys J R Astr Soc,1979,58:91～105
[19]Menke W.Comment on“Dispersion function com-putations for unli mited frequency values”by Anas Abo-Zena.Geophys J R Astr Soc,1979,95:315～323
[20]Kennett B L N,Kerry N J.Seismic waves in a stratified Halfspace.Geophys.J R Astr Soc,1979,57:557～583
[21]Rix G J,Leipski E A.Accuracy&resolution of surface wave inversion.Geotechnical Special Publi-cation,1991,11:17～32
[22]肖柏勋.高模式瑞雷面波及其正反演研究[博士学位论文].长沙:中南大学,2000
[23]Yamanaka H,Ishida H.Application of genetic algo-rithms to aninversion of surface-wave dispersion da-ta.Bulletin ofthe Seismological Society of Ameri-ca,1996,86(2):436～444
[24]Park C B,Miller R D,Xia J H.I maging disper-sion curves of surface waves on multi-channel re-cord.Expanded Abstracts of68th SEG Mtg,1998:1377～1380
[25]Mari J L.Esti mation of static corrections for shear-wave profiling using the dispersion properties of Love waves.Geophysics,1984,49(8):1169～1179
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