| 3-D acoustic wave equation forward modeling with topography |
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| 作者姓名： | 王祥春 刘学伟 |
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| 作者单位： | School of Geophysics and Information Technology, China University of Geosciences, Beijing, 100083, China |
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| 基金项目： | This research is sponsored by the Scientific Research Project of the China Geological Survey ＂Basic Theory, Special Collection and Special Process Method Research on Metal Mineral Seismic Exploration＂ （Project Number： 2000201 0002146）. |
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| 摘 要： | In order to model the seismic wave field with surface topography, we present a method of transforming curved grids into rectangular grids in two different coordinate systems. Then the 3D wave equation in the transformed coordinate system is derived. The wave field is modeled using the finite-difference method in the transformed coordinate system. The model calculation shows that this method is able to model the seismic wave field with fluctuating surface topography and achieve good results. Finally, the energy curves of the direct and reflected waves are analyzed to show that surface topography has a great influence on the seismic wave＇s dynamic properties.
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| 关 键 词： | 三维声波方程 地表 地形 有限差分法 数值建模 |
| 收稿时间： | 8 December 2006 |
| 修稿时间： | 2006-12-082006-12-15 |
3-D acoustic wave equation forward modeling with topography |
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| Xiangchun Wang,Xuewei Liu.3-D acoustic wave equation forward modeling with topography[J].Applied Geophysics,2007,4(1):8-15. |
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| Authors: | Xiangchun Wang Xuewei Liu |
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| Institution: | (1) School of Geophysics and Information Technology, China University of Geosciences, Beijing, 100083, China |
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| Abstract: | In order to model the seismic wave field with surface topography, we present a method of transforming curved grids into rectangular grids in two different coordinate systems. Then the 3D wave equation in the transformed coordinate system is derived. The wave field is modeled using the finite-difference method in the transformed coordinate system. The model calculation shows that this method is able to model the seismic wave field with fluctuating surface topography and achieve good results. Finally, the energy curves of the direct and reflected waves are analyzed to show that surface topography has a great influence on the seismic wave's dynamic properties. |
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| Keywords: | acoustic wave equation surface topography finite-difference numerical modeling |
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