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粘弹各向异性介质中地震波场模拟与特征
引用本文:郭智奇,刘财,杨宝俊,刘洋,王典.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.
作者姓名:郭智奇  刘财  杨宝俊  刘洋  王典
作者单位:吉林大学地球探测科学与技术学院,长春 130026
基金项目:国家自然科学基金(40574042),国家油气专项项目(XQ-2004-07-05)资助
摘    要:通过引入记忆变量,可以避免粘弹性应力-应变关系中的褶积运算,使波场数值模拟易于实现.通过伪谱法对粘弹各向异性介质中的qP波、qS波数值模拟,结合理论分析,研究了粘弹各向异性介质中速度各向异性和衰减各向异性.衰减各向异性要比速度各向异性更为显著,并且qS波比qP波的衰减各向异性明显.粘弹各向异性介质中,粘弹性对波的影响主要在于波的衰减,各向异性主要影响波前面形状.

关 键 词:粘弹各向异性  伪谱法  波场数值模拟  衰减各向异性
文章编号:1004-2903(2007)03-0804-07
收稿时间:2006-07-28
修稿时间:2006-07-282007-05-17

Seismic wave fields modeling and feature in viscoelastic anisotropic media
GUO Zhi-qi,LIU Cai,YANG Bao-jun,LIU Yang,WANG Dian.Seismic wave fields modeling and feature in viscoelastic anisotropic media[J].Progress in Geophysics,2007,22(3):804-810.
Authors:GUO Zhi-qi  LIU Cai  YANG Bao-jun  LIU Yang  WANG Dian
Institution:College of Geoexploration Science and Technology , J ilin LIU Yang, WANG Dian University , Changchun 130026 , China
Abstract:By introducing memory variables,superposition operation can be avoided,so wave fields modeling can be easily processed.And by means of pseudospectrum method modeling qP and qS waves in viscoelastic anisotropic meida,with theory analysis,the velocity anisotropy and attenuation anisotropy are investigated.Attenuation anisotropy is more obvious than velocity anisotropy,and the attenuation anisotropy of qS waves is more significant than that of qP waves.In viscoelastic anisotropic media,the effects of viscoelasticity is mainly on wave attenuation and anisotropy on wave fronts.
Keywords:viscoelastic anisotropy  pseudospectrum method  numerical modeling of wave fields  attenuation anisotropy
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