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《Chinese Journal of Geophysics》 2007-04
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Influence of the self-organization of the Earth interior upon the traveltime and amplitude of seismic wave

XU Tao1,NING Jun-Rui 1,2 ,LIU Chun-Cheng 1,3 ,LI Shou-Lin 1,4 1 State Key Laboratory of Lithosphere Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China2 Exploration and Production Research Institute, SINOPEC, Beijing 100083, China3 China National Offshore Oil Corporation. Tian Jin, Tianjin 300452, China4 International Exploration Corporation, China Petroleum & Chemical Corporation, Beijing 100081, China  
We utilize random media to describe small-scale inhomogeneity and self-organized structure in the Earth interior. A block model is adopted to describe the self-organized structure instead of traditional grids in 2-D. Gaussian, exponential, and von Karman autocorrelation functions are used to represent the isotropic and anisotropic self-organized structure. We use numerical methods to perform ray tracing and rectify amplitudes by dynamic ray tracing, furthermore, analyze the influence upon the kinematic and dynamic characteristics of seismic waves. The results indicate that seismic ray trajectories probably generate significant aberrances and the amplitudes of seismic rays may weaken or enlarge at different offsets for the existence of the self-organized structure in the earth interior; from Gaussian to von Karman, amplitudes present more obvious statistic characters.
【Fund】: 国家自然科学基金项目(40234044 40374010 40404009);; 国家973项目(2002CB412604)资助
【CateGory Index】: P315.2
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