| 任意裂隙方位双相HTI介质的地震波方程及正演模拟 |
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| 引用本文： | 杨佳佳,何兵寿.任意裂隙方位双相HTI介质的地震波方程及正演模拟[J].山东科技大学学报(自然科学版),2011,30(3). |
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| 作者姓名： | 杨佳佳 何兵寿 |
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| 作者单位： | 中国海洋大学,海底科学与探测技术教育部重点实验室,山东青岛266100 |
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| 基金项目： | 国家自然科学重点基金项目(40839901);国家自然科学基金项目(40804021) |
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| 摘 要： | 基于BISQ方程的高频极限,导出了适用于任意方位角的双相HTI介质波动方程,推导了该方程在交错网格空间中求解的高阶有限差分格式和对应的完全匹配层(PML)吸收边界条件,实现了该类介质的地震波场正演模拟。模拟结果表明,该方法能准确模拟地震波在双相HTI介质中的传播过程,得到高精度的波场快照和合成记录。分析得出:在双相各向异性介质中,弹性波的传播仍表现出各向异性特征;孔隙度、粘滞系数和固液耦合密度主要影响慢纵波的振幅和形态。
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| 关 键 词： | 双相各向异性介质 有限差分法 弹性波场 完全匹配层边界 |
The Seismic Wave Equation and Simulation in Dual-phase Anisotropic Media with Arbitrary Fracture Azimuth |
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| YANG Jiajia,HE Bingshou.The Seismic Wave Equation and Simulation in Dual-phase Anisotropic Media with Arbitrary Fracture Azimuth[J].Journal of Shandong Univ of Sci and Technol: Nat Sci,2011,30(3). |
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| Authors: | YANG Jiajia HE Bingshou |
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| Institution: | YANG Jiajia,HE Bingshou(Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University of China,Qingdao,Shandong 266100,China) |
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| Abstract: | Based on the high-frequency limit of BISQ equation,this paper derived the dual-phase HTI media elastic wave equation that could be used in the arbitrary fracture azimuth angle and deduced the high-order finite difference scheme of the wave equation in the space of staggered-grid and the corresponding perfectly matched layer(PML) absorbing boundary conditions,realizing the simulation of seismic wave field for that kind of media.The simulation results showed that the method could accurately simulate the seism... |
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| Keywords: | dual-phase anisotropic media finite difference method elastic wave field perfectly matched layer boundary |
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