| 基于时域加权的拉普拉斯—频率域弹性波全波形反演 |
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| 引用本文： | 刘张聚,童思友,方云峰,贾君莲. 基于时域加权的拉普拉斯—频率域弹性波全波形反演[J]. 石油地球物理勘探, 2021, 56(2): 302-312,331. DOI: 10.13810/j.cnki.issn.1000-7210.2021.02.012 |
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| 作者姓名： | 刘张聚 童思友 方云峰 贾君莲 |
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| 作者单位： | 1. 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;2. 青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室, 山东青岛 266061;3. 浙江大学地球科学学院, 浙江杭州 310027;4. 自然资源部第二海洋研究所海底科学重点实验室, 浙江杭州 310012;5. 东方地球物理公司物探技术研究中心, 河北涿州 072751;6. 东方地球物理公司研究院, 河北涿州 072751 |
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| 基金项目： | 本项研究受国家自然科学基金面上项目"OBN地震勘探检波点动态定位及基于深度学习的波场分离技术研究（42074140）、重点项目"海底顶层电火花源立体探测系统及成像"（41230318）、国家科技重大专项"深层宽频三维地震高精度采集处理技术"（2016ZX05027-002-005）、中国石油集团东方地球物理公司科研专项"中东高端市场处理关键技术研发与应用"（01-01-01-2019）联合资助。 |
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| 摘 要： | 弹性波全波形反演是强非线性问题,极易因为对初始模型精度或记录的低频成分的强烈依赖性而陷入局部极小,导致反演失败.为此,建立了一种基于时域加权的拉普拉斯—频率域弹性波全波形反演方法.首先在结合了两种域各自优势的时间—频率域弹性波全波形反演基础上,通过引入拉普拉斯衰减因子降低了全波形反演对于低频成分的依赖性,形成了兼具三种...
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| 关 键 词： | 全波形反演 弹性波 时域加权 拉普拉斯—频率域 |
| 收稿时间： | 2020-06-28 |
Full elastic waveform inversion in Laplace-Fourier domain based on time domain weighting |
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| LIU Zhangju,TONG Siyou,FANG Yunfeng,JIA Junlian. Full elastic waveform inversion in Laplace-Fourier domain based on time domain weighting[J]. Oil Geophysical Prospecting, 2021, 56(2): 302-312,331. DOI: 10.13810/j.cnki.issn.1000-7210.2021.02.012 |
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| Authors: | LIU Zhangju TONG Siyou FANG Yunfeng JIA Junlian |
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| Abstract: | Full elastic waveform inversion is a strong nonlinear problem and easy to fall into the local minimum due to strong dependence on the precision of the initial model or the low-frequency component of seismic record, which lead to failed inversion. In this study, we set up full elastic waveform inversion in Laplace-Fourier domain based on time domain weighting. This method reduces the dependence of full waveform inversion on low-frequency components by introducing a Laplace atte-nuation factor into the full waveform inversion in time-Fourier domain, and forms time-Laplace-frequency domain elastic inversion with the advantages of three domains by combining the advantages of time domain and frequency domain. And finally the negative effect of the Laplace attenuation factor is eliminated by the flexible form of weighting seismic records in time domain. Application to model data has proved that, in the absence of low-frequency components, this method can obtain more accurate inversion results with low dependence on the initial model. |
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| Keywords: | full waveform inversion elastic wave time domain weighting Laplace-Fourier domain |
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