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《Oil Geophysical Prospecting》 2007-05
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Numeric simulation of elastic wavefield separation by staggering grid high-order finite-difference algorithm

Li Zhen-chun, Faculty of Earth Resource and Information, University of Petroleum, Dongying City, Shandong Province,257062,China, Zhang Hua, Liu Qing-ming and Han Wen-gong  
Elastic wave propagation of seismic waves can produce P-wave and S-wave,therefore, using full e-lastic wave equation to carry out numeric simulation of elastic wavefield can only get hybrid wavefield coupling P-wave with S-wave. Starting from the idea of P-wave wavefield being rotation-free field and S-wave divergence-free field,the paper deduced separation equation of first-order velocity-stress elastic wavefield, which meets this condition, and used staggering grid high-order finite-difference algorithm to carry out numeric simulation of wavefield separation equation. The simulated cases showed that the approach not only can successfully separate P-wave wavefield from S-wave wavefield in hybrid wavefield, but also is characterized by good stability and higher simulated precision, which can be used for studying the rule of elastic wave propagation and seismic data processing.
【Fund】: 国家自然科学基金(40474041);; 国家863专题(2006AA06Z206);; CNPC中青年创新基金(04E7040);; 中原油田博士后科研工作站;; CNPC物探重点实验室中国石油大学(华东)研究室资助。
【CateGory Index】: P631.4
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