Seismic wave propagation in Kelvin visco-elastic VTI media  

Kelvin粘弹性VTI介质中地震波的传播(英文)

作　　者：芦俊[1] 王赟[2] 

机构地区：[1]中国地质大学(北京),北京100083 [2]中国科学院地球化学研究所,贵阳550001

出　　处：《Applied Geophysics》2010年第4期357-364,400,共9页应用地球物理（英文版）

基　　金：the National 973 Program(Grant No.2006CB202207);Special Fund(Grant Nos. 2008ZX05035-001-003,2008ZX05035-003-004,and 2008ZX05008-006-004).

摘　　要：In this article,under the assumption of weak anisotropy and weak attenuation, we present approximate solutions of anisotropic complex velocities and quality-factors for Kelvin visco-elastic transverse isotropy（KEL-VTI） media,based on the complex physical parameter matrix.Also,combined with the KEL-VTI media model,the propagation characteristics of the qP-,qS V-,and qSH-wave phases and energies are discussed.Further, we build a typical KEL-VTI media model of the Huainan coal mine to model the wave propagation.The numerical simulation results show that the PP- and PSV-wave theoretical wave-fields are close to the wave-fields of three-component P- and converted-waves acquired in the work area.This result proves that the KEL-VTI media model gives a good approximation to this typical coalfield seismic-geologic conditions and is helpful to the study of attenuation compensation of multi-component seismic data.基于Kelvin横向各向同性(KEL-VTI)介质的复物性参数矩阵,在弱各向异性和弱衰减的假设下,提出KEL-VTI介质各向异性复相速度和品质因子的近似解;结合KEL-VTI介质模型,讨论了qP、qSV、qSH波的相位与能量的传播特点;进一步针对淮南煤矿的地质情况建立了典型的KEL-VTI介质模型,数值模拟结果显示PP、PSV波的理论波场与该地区实际采集的三分量地震的纵波和转换波波场吻合程度较好,说明KEL-VTI介质假设是对这种典型煤田地震地质条件的较好近似,有助于多分量地震数据的吸收衰减补偿研究。

关 键 词：KEL-VTI media complex velocity quality-factor ANISOTROPY 

分 类 号：P631.4[天文地球—地质矿产勘探]