| 地震多级散射波正演模拟方法 |
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| 引用本文： | 张博,吴国忱,李青阳,杨凌云,单俊臻.地震多级散射波正演模拟方法[J].地震学报,2022,44(4):608-618. |
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| 作者姓名： | 张博 吴国忱 李青阳 杨凌云 单俊臻 |
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| 作者单位： | 中国山东青岛 266580 中国石油大学（华东）地球科学与技术学院 |
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| 基金项目： | 国家自然科学基金（42030103）资助 |
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| 摘 要： | 地震波在穿越地下散射体群时会产生多级散射波，分析其地震响应特征，可推断散射体的分布情况和性质。本文从二维标量波动方程出发，结合地震散射理论和波恩近似理论，推导了多级散射波方程。在此基础上，采用高阶有限差分法对双点散射体模型和复杂散射体模型进行数值模拟，分析了多级散射波的传播规律和波场特征，并通过抽取多级散射记录和各级散射记录的单道记录与参考单道记录的对比，验证了本文推导散射波方程的准确性。
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| 关 键 词： | 多级散射 标量波方程 有限差分 正演模拟 |
| 收稿时间： | 2021-04-18 |
Forward modeling method of seismic multiple scattered waves |
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| Affiliation: | School of Geosciences，China University of Petroleum，Shandong Qingdao 266580，China |
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| Abstract: | When seismic waves pass through the underground scatterers, multi-order scattered waves will be generated, and the analysis of their seismic response characteristics is beneficial to infer the distribution and properties of the scatterers. Based on the two-dimensional scalar wave motion equation, combined with the seismic scattering theory and the Born approximation theory, the multi-order scattering wave equation is deduced. The numerical simulation of the two-point scatterer model and the complex scatterer model is carried out by using the high-order finite difference method, and the propagation law and wavefield characteristics of the multi-order scattered wave are analyzed. And then the single track records of multi-order scattering and each scattering are extracted and compared with the reference single track records, which verifies the accuracy of the scattering wave equation derived in this paper. |
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