| 三维波动方程有限差分正演方法 |
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| 引用本文： | 金胜汶,陈必远.三维波动方程有限差分正演方法[J].地球物理学报,1994,37(6):804-810. |
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| 作者姓名： | 金胜汶 陈必远 |
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| 作者单位： | 同济大学海洋地质和地球物理系, 上海 200092 |
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| 摘 要： | 三维地震资料的处理和解释都需要有效的三维正演模型予以验证．本文提出一种在ｘ－ｔ域实现快速、高精度的有限差分正演方法，采用了独特的“平行四边形网格”，并用Ｐ－Ｒ交替差分格式使三维波动方程可以局部地分裂成二维求解方程，从而有效地减少运算量．
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| 关 键 词： | 三维波动方程 正演模拟 有限差分 |
| 收稿时间： | 1992-05-26 |
THREE-DIMENSIONAL WAVE EQUATION FORWARD MODELLING BY THE FINITE-DIFFERENCE METHOD |
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| JIN SHENG-WEN,CHEN BI-YUAN,MA ZAI-TIAN.THREE-DIMENSIONAL WAVE EQUATION FORWARD MODELLING BY THE FINITE-DIFFERENCE METHOD[J].Chinese Journal of Geophysics,1994,37(6):804-810. |
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| Authors: | JIN SHENG-WEN CHEN BI-YUAN MA ZAI-TIAN |
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| Institution: | Dept.of Marine Geology and Geophysics, Tongji University, Shanghai 200092 |
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| Abstract: | The Processing and interpretation of 3-D seismic data are usually checked by the effected 3-D forward modelling.But the conventional 3-D wave equation modelling methods are almost carried out in the frequencyspace domain or in the frequency-wavenumber domain,limited with the medium velocity variations.Therefore,it is difficult to construct the more complicated model.The method used here is a fast and high-quality finite-difference algorithm for forward modelling in the timespace domain, easily to handle with the varied velocities.The floating coordinates system transformation is first introduced to add the seismic source to model the complex structure by forward extrapolating the wavefield. |
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| Keywords: | D wave equation Forward modelling Finite-difference |
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