弱各向异性介质弹性波的准各向同性近似正演模拟
|
摘要
准各向同性(QI)近似可用于弱各向异性介质的正演模拟.本文通过运用QI方法的零阶和一阶近似,计算了VTI介质模型的地震记录.得出的地震记录与标准各向同性射线理论(IRT)和基于伪谱法的三维地震正演模拟得出的地震记录作了比较,可以认为是精确的合成地震记录.
The quasi-isotropic(QI) approximation allows to perform modeling in weakly anisotropic medium.Seismograms for VTI medium are calculated using the zeroth-and first-order QI approximation.These seismograms are compared with seismograms computed by the standard isotropic ray theory(IRT) and by a 3D seismic forward modeling algorithm which is based on a pseudo-spectral method.The seismograms obtained by the quasi-isotropic(QI) approximation are considered as exact seismograms.
The quasi-isotropic(QI) approximation allows to perform modeling in weakly anisotropic medium.Seismograms for VTI medium are calculated using the zeroth-and first-order QI approximation.These seismograms are compared with seismograms computed by the standard isotropic ray theory(IRT) and by a 3D seismic forward modeling algorithm which is based on a pseudo-spectral method.The seismograms obtained by the quasi-isotropic(QI) approximation are considered as exact seismograms.
引文
[1]郭智奇,刘财,杨宝俊,等.粘弹各向异性介质中地震波场模拟与特征[J].地球物理学进展,2007,22(3):804~810.Guo Z Q,Liu C,Yang B J,et al.Seismic wave fields modelingand feature in viscoelastic anisotropic media[J].Progress inGeophysics(in Chinese),2007,22(3):804~810.
[2]严家斌,刘贵忠.基于各向异性扩散的ROBUST阻抗估计方法[J].地球物理学进展,2007,22(5):1403~1407.Yan J B,Liu G Z.Robust Impedance estimation method basedon anisotropic diffusion[J].Progress in Geophysics(in Chi-nese),2007,22(5):1403~1407.
[3]李天成,牛滨华,孙春岩,等.VTI介质中P-SV波转换点与各向异性参数关系[J].地球物理学进展,2007,22(5):1522~1526.Li T C,Niu B H,Sun C Y,et al.The relationship of VTImedia P-SV wave converted Point and anisotropy parameters[J].Progress in Geophysics(in Chinese),2007,22(5):1522~1526.
[4]杜启振,王延光,付水华.方位各向异性粘弹性介质波场数值模拟[J].地球物理学进展,2006,21(2):502~504.Du Q Z,Wang Y G,Fu S H.Wavefield forward modelingwith the pseudo-spectral method in viscoelastic and azimuthallyanisotropic media[J].Progress in Geophysics(in Chinese),2006,21(2):502~504.
[5]苑书金,于常青.各向异性介质中的弹性阻抗及其反演[J].地球物理学进展,2006,21(2):520~523.Yuan S J,Yu C Q.Elastlc impedance and seismic inversion inanisotropic media[J].Progress in Geophysics(in Chinese),2006,21(2):520~523.
[6]吴晶,高原,陈运泰,等.首都圈西北部地区地壳介质地震各向异性特征初步研究[J].地球物理学报,2007,50(1):209~220.Wu J,Gao Y,Chen Y T,等.Seismic anisotropy in the crust innorthwestern capital area of China[J].Chinese J.Geophys.(in Chinese),2007,50(1):209~220
[7]刘永霞,徐涛,赵兵,等.自相似型各向异性自组织介质中地震波场动力学响应[J].地球物理学报,2007,50(1):221~232.Liu Y X,Xu T,Zhao B,et al.Seismic sounding of anisotropicself-similar self-organized medium[J].Chinese J.Geophys.(in Chinese),2007,50(1):221~232
[8]刘礼农,陈小宏,张剑锋,等.轴对称各向异性介质波动方程深度偏移的对称非平稳相移方法[J].地球物理学报,2007,50(1):277~284.Liu L N,Chen X H,Zhang J F,et al.Wave equation depthmigration with symmetric non-stationary phase shift method inaxi-symmetrical anisotropic media[J].Chinese J.Geophys.(in Chinese),2007,50(1):277~284.
[9]彭艳菊,黄忠贤,苏伟,等.中国大陆及邻区海域地壳上地幔各向异性研究[J].地球物理学报,2007,50(3):751~759.Peng Y J,Huang Z X,Su W,et al.Anisotropy in crust andupper mantle beneath China continent and its adjacent seas[J].Chinese J.Geophys.(in Chinese),2007,50(3):752~759.
[10]李志伟,胥颐,Steven W.Roecker,等.中天山地区的Pn波速度结构与各向异性[J].地球物理学报,2007,50(4):1066~1072.Li Z W,Xu Y,Roecker S W,et al.Pn wave velocity struc-ture and anisotropy in the central Tien Shan region[J].Chi-nese J.Geophys.(in Chinese),2007,50(4):1066~1072.
[11]刘财,郭智奇,杨宝俊,等.黏弹各向异性介质中波的反射与透射问题分析[J].地球物理学报,2007,50(4):1216~1224.Liu C,Guo Z Q,Yang B J,et al.Analysis of reflection andtransmission problems of waves in viscoelastic anisotropicmedia[J].Chinese J.Geophys.(in Chinese),2007,50(4):1216~1224.
[12]杜学彬,李宁,叶青,等.强地震附近视电阻率各向异性变化的原因[J].地球物理学报,2007,50(6):1802~1810.Du X B,Li N,Ye Q,et al.A possible reason for the aniso-tropic changes in apparent resistivity near the focal region ofstrong earthquake[J].Chinese J.Geophys.(in Chinese),2007,50(6):1802~1810.
[13]徐震,徐鸣洁,王良书,等.用接收函数Ps转换波研究地壳各向异性——以哀牢山-红河断裂带为例[J].地球物理学报,2006,49(2):438~448.Xu Z,Xu M J,Wang L S,et al.A study on crustal anisotro-py using P to S converted phase of the receiver function:Ap-plication to Ailaoshan-Red River fault zone[J].Chinese J.Geophys.(in Chinese),2006,49(2):438~448
[14]刘恩儒,岳建华,潘冬明.地震各向异性——多组裂隙对横波偏振的影响[J].地球物理学报,2006,49(5):1401~1409.Liu E R,Yue J H,Pan D M.Frequency-dependent anisotro-py:Effects of multiple fracture sets on shear-wave polariza-tions[J].Chinese J.Geophys.(in Chinese),2006,49(5):1401~1409.
[15]魏建新,狄帮让,王椿镛.各向异性介质中扭转波分裂的初步实验观测[J].地球物理学报,2006,49(6):1755~1761Wei J X,Di B R,Wang C Y.Experiment observation of tor-sion wave splitting in anisotropic medium[J].Chinese J.Geophys.(in Chinese),2006,49(6):1755~1761.
[16]徐震,徐鸣洁,王良书,等.用接收函数Ps转换波研究地壳各向异性—以哀牢山-红河断裂带为例[J].地球物理学报,2006,49(2):438~448Xu Z,Xu M J,Wang L S,et al.A study on crustal anisotro-py using P to S converted phase of the receiver function:Ap-plication to Ailaoshan-Red River fault zone[J].Chinese J.Geophys.(in Chinese),2006,49(2):438~448.
[2]严家斌,刘贵忠.基于各向异性扩散的ROBUST阻抗估计方法[J].地球物理学进展,2007,22(5):1403~1407.Yan J B,Liu G Z.Robust Impedance estimation method basedon anisotropic diffusion[J].Progress in Geophysics(in Chi-nese),2007,22(5):1403~1407.
[3]李天成,牛滨华,孙春岩,等.VTI介质中P-SV波转换点与各向异性参数关系[J].地球物理学进展,2007,22(5):1522~1526.Li T C,Niu B H,Sun C Y,et al.The relationship of VTImedia P-SV wave converted Point and anisotropy parameters[J].Progress in Geophysics(in Chinese),2007,22(5):1522~1526.
[4]杜启振,王延光,付水华.方位各向异性粘弹性介质波场数值模拟[J].地球物理学进展,2006,21(2):502~504.Du Q Z,Wang Y G,Fu S H.Wavefield forward modelingwith the pseudo-spectral method in viscoelastic and azimuthallyanisotropic media[J].Progress in Geophysics(in Chinese),2006,21(2):502~504.
[5]苑书金,于常青.各向异性介质中的弹性阻抗及其反演[J].地球物理学进展,2006,21(2):520~523.Yuan S J,Yu C Q.Elastlc impedance and seismic inversion inanisotropic media[J].Progress in Geophysics(in Chinese),2006,21(2):520~523.
[6]吴晶,高原,陈运泰,等.首都圈西北部地区地壳介质地震各向异性特征初步研究[J].地球物理学报,2007,50(1):209~220.Wu J,Gao Y,Chen Y T,等.Seismic anisotropy in the crust innorthwestern capital area of China[J].Chinese J.Geophys.(in Chinese),2007,50(1):209~220
[7]刘永霞,徐涛,赵兵,等.自相似型各向异性自组织介质中地震波场动力学响应[J].地球物理学报,2007,50(1):221~232.Liu Y X,Xu T,Zhao B,et al.Seismic sounding of anisotropicself-similar self-organized medium[J].Chinese J.Geophys.(in Chinese),2007,50(1):221~232
[8]刘礼农,陈小宏,张剑锋,等.轴对称各向异性介质波动方程深度偏移的对称非平稳相移方法[J].地球物理学报,2007,50(1):277~284.Liu L N,Chen X H,Zhang J F,et al.Wave equation depthmigration with symmetric non-stationary phase shift method inaxi-symmetrical anisotropic media[J].Chinese J.Geophys.(in Chinese),2007,50(1):277~284.
[9]彭艳菊,黄忠贤,苏伟,等.中国大陆及邻区海域地壳上地幔各向异性研究[J].地球物理学报,2007,50(3):751~759.Peng Y J,Huang Z X,Su W,et al.Anisotropy in crust andupper mantle beneath China continent and its adjacent seas[J].Chinese J.Geophys.(in Chinese),2007,50(3):752~759.
[10]李志伟,胥颐,Steven W.Roecker,等.中天山地区的Pn波速度结构与各向异性[J].地球物理学报,2007,50(4):1066~1072.Li Z W,Xu Y,Roecker S W,et al.Pn wave velocity struc-ture and anisotropy in the central Tien Shan region[J].Chi-nese J.Geophys.(in Chinese),2007,50(4):1066~1072.
[11]刘财,郭智奇,杨宝俊,等.黏弹各向异性介质中波的反射与透射问题分析[J].地球物理学报,2007,50(4):1216~1224.Liu C,Guo Z Q,Yang B J,et al.Analysis of reflection andtransmission problems of waves in viscoelastic anisotropicmedia[J].Chinese J.Geophys.(in Chinese),2007,50(4):1216~1224.
[12]杜学彬,李宁,叶青,等.强地震附近视电阻率各向异性变化的原因[J].地球物理学报,2007,50(6):1802~1810.Du X B,Li N,Ye Q,et al.A possible reason for the aniso-tropic changes in apparent resistivity near the focal region ofstrong earthquake[J].Chinese J.Geophys.(in Chinese),2007,50(6):1802~1810.
[13]徐震,徐鸣洁,王良书,等.用接收函数Ps转换波研究地壳各向异性——以哀牢山-红河断裂带为例[J].地球物理学报,2006,49(2):438~448.Xu Z,Xu M J,Wang L S,et al.A study on crustal anisotro-py using P to S converted phase of the receiver function:Ap-plication to Ailaoshan-Red River fault zone[J].Chinese J.Geophys.(in Chinese),2006,49(2):438~448
[14]刘恩儒,岳建华,潘冬明.地震各向异性——多组裂隙对横波偏振的影响[J].地球物理学报,2006,49(5):1401~1409.Liu E R,Yue J H,Pan D M.Frequency-dependent anisotro-py:Effects of multiple fracture sets on shear-wave polariza-tions[J].Chinese J.Geophys.(in Chinese),2006,49(5):1401~1409.
[15]魏建新,狄帮让,王椿镛.各向异性介质中扭转波分裂的初步实验观测[J].地球物理学报,2006,49(6):1755~1761Wei J X,Di B R,Wang C Y.Experiment observation of tor-sion wave splitting in anisotropic medium[J].Chinese J.Geophys.(in Chinese),2006,49(6):1755~1761.
[16]徐震,徐鸣洁,王良书,等.用接收函数Ps转换波研究地壳各向异性—以哀牢山-红河断裂带为例[J].地球物理学报,2006,49(2):438~448Xu Z,Xu M J,Wang L S,et al.A study on crustal anisotro-py using P to S converted phase of the receiver function:Ap-plication to Ailaoshan-Red River fault zone[J].Chinese J.Geophys.(in Chinese),2006,49(2):438~448.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心