| 黏性声波方程数值正演中的匹配Z变换完全匹配层吸收边界 |
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| 引用本文： | 赵建国,史瑞其,陈竞一,潘建国,王宏斌.黏性声波方程数值正演中的匹配Z变换完全匹配层吸收边界[J].地球物理学报,2014,57(4):1284-1291. |
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| 作者姓名： | 赵建国 史瑞其 陈竞一 潘建国 王宏斌 |
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| 作者单位： | 1. 中国石油大学（北京）地球物理与信息工程学院;油气资源与 探测国家重点实验室;CNPC物探重点实验室, 北京 102249;
2. 中海油研究总院, 北京 100027;
3. Tulsa大学地球科学学院, Oklahoma, 74104 USA;
4. 中石油勘探开发研究院西北分院, 兰州 730000 |
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| 基金项目： | 国家自然科学基金项目(41274138);中国石油大学(北京)基础研究基金(KYJJ2012-05-25)资助 |
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| 摘 要： | 本文将非分裂场形式的匹配Z变换PML引入黏声波方程数值正演中，用时域有限差分模拟检验了其在黏声波方程模拟中的效果.数值正演结果表明，在大角度入射时匹配Z变换完全匹配层比传统PML表现更佳，消除了大角度入射产生的低频虚假反射.长时间能量衰减计算证明匹配Z变换完全匹配层在黏声波方程模拟中具有105时间步的稳定性.
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| 关 键 词： | 完全匹配层 匹配Z变换 吸收边界 黏声波方程 时域有限差分 |
| 收稿时间： | 2013-05-06 |
An matched Z-transform perfectly matched layer absorbing boundary in the numerical modeling of viscoacoustic wave equations |
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| ZHAO Jian-Guo,SHI Rui-Qi,CHEN Jing-Yi,PAN Jian-Guo,WANG Hong-Bin.An matched Z-transform perfectly matched layer absorbing boundary in the numerical modeling of viscoacoustic wave equations[J].Chinese Journal of Geophysics,2014,57(4):1284-1291. |
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| Authors: | ZHAO Jian-Guo SHI Rui-Qi CHEN Jing-Yi PAN Jian-Guo WANG Hong-Bin |
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| Institution: | 1. College of Geophysics and Information Engineering, China University of Petroleum (Beijing); State Key Lab of Petroleum Resource and Prospecting; CNPC Key Lab of China University of Petroleum (Beijing), Beijing 102249, China;
2. CNOOC Research Institute, Beijing 100027, China;
3. Department of Geoscience, University of Tulsa, Oklahoma 74104, U.S.A;
4. Northwest Institute of Oil Exploration and Development, CNPC, Lanzhou 730000, China |
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| Abstract: | An unsplit matched Z-transform PML (MZT-PML) is introduced in the modeling of viscoacoustic wave equations, and the performance of this technique is validated through time-domain finite-difference modeling. The numerical experiments demonstrate that MZT-PML performs better than the classical PML in high-angle incidence case and well eliminates the low-frequency spurious reflections in this case. Long-time calculation of energy decay shows that MZT-PML is stable up to 105 time steps in viscoacoustic wave modeling. |
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| Keywords: | Perfectly matched layer Matched Z-transform Absorbing boundary Viscoacoustic wave equation Finite-difference in time-domain |
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