旋转交错网格TTI介质波场模拟与波场分解
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
为了得到TTI介质中传播的纯纵波和纯横波波场,采用旋转交错网格高阶有限差分法对TTI介质中传播的地震波场进行了数值模拟,并利用q P波、q SV波、SH波的极化方向相互垂直的特性,来实现q P波、q SV波、SH波的分解。通过对均匀介质模型和复杂层状介质模型分解前后波场快照和地震记录的对比,验证了本文方法的正确性。
In order to obtain the pure P and SV and SH waves in the TTI media. The rotated staggered grid finite-difference method was used to simulate the waves propagate in the TTI media,and the properties of the P、SV、SH polarization directions perpendicular to each other was used to decompose the coupled waves. This method is testified by thecomparison of the original wave-field and the decomposed wave-fields of a homogeneous media and a complex 6 layers media.
引文
[1]Amundsen L,Reitan A.Decomposition of multicomponent sea-floor data into upgoing and downgoing P-and S-waves[J].Geophysics,1995,60(2):563-572.
    [2]Sun R,Mc Mechan G A,Chuang H H.Amplitude balancing in separating P-and S-waves in 2D and 3D elastic seismic data[J].Geophysics,2011,76(3):S103-S113.
    [3]van Der Baan M.PP/PS Wavefield separation by independent component analysis[J].Geophysical Journal International,2006,166(1):339-348.
    [4]Cheng J,Kang W.Propagating Pure Wave Modes in 3D GeneralAnisotropic Media:PART I—P-Wave Propagator[C]//Expanded Abstracts of 82ndSEG Annual International Meeting,2012.
    [5]Kang W,Cheng J.Propagating Pure Wave Modes in 3D General Anisotropic Media:PART II—SV and SH Wave[C]//Expanded Abstracts of 82ndSEG Annual International Meeting,2012.
    [6]马德堂,朱光明.弹性波波场P波和S波分解的数值模拟[J].石油地球物理勘探,2003,38(5):482-486.
    [7]李振春,张华,刘庆敏,等.弹性波交错网格高阶有限差分法波场分离数值模拟[J].石油地球物理勘探,2007,42(5):510-515.
    [8]Dellinger J A.Anisotropic seismic wave propagation[D].Stanford University,1991.
    [9]Dellinger J,Etgen J.Wave-type separation in 3-D anisotropic media[C]//Expanded Abstracts of 59thSEG Annual International Meeting,1989:977-979.
    [10]Yan J,Sava P.Elastic wave-mode separation for VTI media[J].Geophysics,2009,74(5):WB19-WB32.
    [11]Zhang Q,McM echan G A.2D and 3D elastic wavefield vector decomposition in the wavenumber domain for VTI media[J].Geophysics,2010,75(3):D13-D26.
    [12]Du Q Z,Zhang M Q.Wave-number domain interpolatin of staggered grid for true-amplitude wavefield separation[C]//Expanded Abstracts of 83rdSEG Annual International Meeting,2013.
    [13]Thomsen L.Elastic anisotropy due to aligned cracks in porous rock[J].Geophysical Prospecting,1995,43(6):805-829
    [14]Bohlen T,Saenger E H.Accuracy of heterogeneous staggered-grid finite-difference modeling of Rayleigh waves[J].Geophysics,2006,71(4):T109-T115.

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