基于多偏移距探地雷达数据的包络-波形反演

槐楠; 曾昭发; 李静; 王卓

doi:10.11999/JEIT211078

基于多偏移距探地雷达数据的包络-波形反演

doi: 10.11999/JEIT211078

槐楠^{1, 2},
曾昭发^1, ,,
李静¹,
王卓¹

1.
吉林大学地球探测科学与技术学院长春 130026
2.
吉林建筑大学测绘与勘查工程学院长春 130118

基金项目: 国家自然科学基金(42174065)，吉林省自然科学基金(20200201216JC)，陕西地建-西安交大土地工程与人居环境技术创新中心开放基金(2021WHZ0080)

详细信息

作者简介:
槐楠：女，1991年生，讲师，研究方向为探地雷达全波形反演

曾昭发：男，1966年生，教授，研究方向为探地雷达系统、数据处理与解释

李静：男，1988年生，教授，研究方向为近地表地球物理成像

王卓：女，1996年生，博士生，研究方向为冰雷达数据处理与解释

通讯作者:
曾昭发　zengzf@jlu.edu.cn

中图分类号: TN911.7
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出版历程
- 收稿日期: 2021-10-08
- 修回日期: 2022-03-18
- 录用日期: 2022-03-18
- 网络出版日期: 2022-03-23
- 刊出日期: 2022-04-18

Envelope-waveform Inversion Based on Multi-offset Ground Penetrating Radar Data

HUAI Nan^{1, 2},
ZENG Zhaofa^{1
, ,},
LI Jing¹,
WANG Zhuo¹

1.
College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China
2.
School of Geomatics and Prospecting Engineering, Jilin Jianzhu University, Changchun 130118, China

Funds: The National Natural Science Foundation of China (42174065), The Natural Science Foundation of Jilin Province (20200201216JC), The Technology Innovation Center for Land Engineering and Human Settlements, Shaanxi Land Engineering Construction Group Co.,Ltd and Xi'an Jiaotong University (2021WHZ0080)

摘要

摘要: 全波形反演(FWI)通过综合利用波场的运动学和动力学特征来实现对地下介质的高精度建模，是最具潜力的反演方法之一。目前，全波形反演仍面临诸多亟待解决的问题，最著名的就是初始模型依赖性问题。低频成分对于恢复长波背景速度结构进而构建初始模型至关重要，但是实际采集的探地雷达(GPR)数据中往往存在低频信息不足的情况，导致全波形反演难以获得理想的结果。为此，该文提出基于地面多偏移距雷达数据的包络-波形反演方法，利用包络波场携带低频信息的特征来构建大尺度背景模型，同时又实现了对小尺度弱扰动目标体的精细刻画。在原始记录低频成分缺失的情况下，通过与常规全波形反演方法进行对比表明：包络-波形反演方法能够有效重构缺失的低频成分，提高对地下大尺度背景构造和细节信息的成像效果。
- 探地雷达 /
- 多偏移距 /
- 全波形反演 /
- 包络-波形反演 /
- 低频成分
Abstract: At present, initial model dependence is one of the most famous problem in Full-Waveform Inversion (FWI). It is very important to use the low-frequency components to build an accurate initial model. However, insufficient low-frequency information is obtained in the field dataset of Ground Penetrating Radar (GPR), which makes it difficult ensure accurate results for FWI. Therefore, an envelope-waveform inversion method based on multi-offset GPR data is proposed, which uses the envelope operator to build a large-scale background model and describe small-scale targets. Compared with the results of conventional FWI, the envelope-waveform inversion can effectively reconstruct the missing low-frequency components and improve the imaging effect of underground large-scale background structure and detail information.
- Ground Penetrating Radar(GPR) /
- Multi-offset acquisition configuration /
- Full-Waveform Inversion(FWI) /
- Envelope-waveform inversion /
- Low-frequency component

HTML全文

图 1 子波及其包络的波形与频谱信息

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图 2 3层结构介质模型

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图 3 3层结构介质模型的反演结果

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图 4 反演结果抽道对比

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图 5 第1个源对应的第1道探地雷达合成记录及其频谱

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图 6 低频缺失情况下模型的反演结果

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图 7 反演结果抽道对比

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图 8 添加噪声后模型的反演结果

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图 9 反演结果抽道对比

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