| 双相TI介质中弹性波交错网格高阶有限差分法数值模拟 |
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| 引用本文： | 尹学爱,邱光辉.双相TI介质中弹性波交错网格高阶有限差分法数值模拟[J].物探化探计算技术,2012,34(5):533-540. |
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| 作者姓名： | 尹学爱 邱光辉 |
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| 作者单位： | 1. 滨州学院,山东滨州,256603
2. 中化地质矿山总局 山东地质勘查院,山东济南,250013 |
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| 基金项目： | 滨州学院科研基金（BZXYLI107） |
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| 摘 要： | 应用双相介质波动方程,推导了双相横向各向同性介质(TI)中波动方程的有限差分格式,对双相TI介质中弹性波有限差分数值进行了模拟.结果表明,弹性波在双相TI介质中传播时,除了存在常规的快纵波(qP1)和横波以外,还存在慢纵波( qP2).并且慢纵波的速度明显小于快纵波,而且受耗散系数的影响衰减地很快,所以在实际中很难观测到慢纵波.快纵波在固相和流相中相位相同,而慢纵波在固相和流相中的相位相反.慢纵波在流相中振幅大,而在固相中的振幅较小.
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| 关 键 词： | 双相横向各向同性介质 交错网格 有限差分法 弹性波 |
ELASTIC WAVE NUMERICAL SIMULATION IN TWO-PHASE TRANSVERSELY ISOTROPIC MEDIUM BY HIGH-ORDER STAGGERED-GRID FINITE DIFFERENCE METHOD |
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| YIN Xue-ai,QIU Guang-hui.ELASTIC WAVE NUMERICAL SIMULATION IN TWO-PHASE TRANSVERSELY ISOTROPIC MEDIUM BY HIGH-ORDER STAGGERED-GRID FINITE DIFFERENCE METHOD[J].Computing Techniques For Geophysical and Geochemical Exploration,2012,34(5):533-540. |
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| Authors: | YIN Xue-ai QIU Guang-hui |
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| Institution: | 1.Binzhou University,Binzhou 256603,China;2.Institute of Geological Prospecting Shandong,Bureau of Chemical Geology and Mine,Jinan 250013,China). |
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| Abstract: | Finite differential format of wave equation in two-phase transverse isotropic media(TI) is obtained by solving two-phase media wave equation,and the numerical simulation of elastic wave finite difference is carried out in two-phase TI media.The results show that in the two-phase elastic wave propagation in TI media,in addition to existing conventional fast P wave(qP1) and S wave,there is slow P wave(qP2),slow P wave was significantly less than the speed of fast P wave,and the dissipation coefficient attenuate very quickly,so in practice it is difficult to observe slow P wave.The phase of the fast P wave is same in both solid phase and liquid phase,and that of the slow P wave is reverse.the amplitude of the slow P wave in liquid phase is bigger than that in solid phase. |
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| Keywords: | two-phase transversely isotropic media staggered-grid finite difference method elastic wave |
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