AccScience Publishing / JSE / Online First / DOI: 10.36922/JSE026120051
ARTICLE

Research on an automatic seismic first-arrival picking application based on deep learning semantic segmentation

Daicheng Peng1,2,3* Bo Deng2 Guilong Gao2 Xiurong Li2 Gang Wang2 Min Yin2 Xiong Ma1,2*
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1 Key Laboratory of Exploration Technologies for Oil and Gas Resource, Ministry of Education, Yangtze University, Wuhan, Hubei, China
2 SINOPEC Geophysical Corp. Jianghan Branch, Qianjiang, Hubei, China
3 Hubei Subsurface Multi-scale Imaging Key Laboratory, School of Geophysics and Geomatics, China University of Geosciences, Wuhan, Hubei, China
Received: 20 March 2026 | Revised: 17 April 2026 | Accepted: 22 April 2026 | Published online: 21 May 2026
© 2026 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
Abstract

First-arrival picking is a fundamental step in seismic data processing, directly influencing the accuracy of subsequent procedures such as static correction, near-surface velocity modeling, and seismic imaging. However, under complex near-surface conditions and low signal-to-noise ratio environments, conventional automatic picking methods often suffer from limited accuracy, poor continuity, and strong dependence on data quality, necessitating extensive manual intervention. To address these challenges, this study proposes a semantic segmentation-based deep learning framework for automatic first-arrival picking, reformulating the task as a pixel-level classification problem on two-dimensional time–trace seismic records, enabling holistic modeling of wavefield characteristics before and after the first-arrival. Within this framework, three representative architectures—U-Net, MobileNet-U-Net, and Attention-U-Net—were constructed and systematically evaluated from the perspectives of standard design, lightweight optimization, and attention enhancement. Synthetic seismic datasets generated via finite-difference forward modeling were used for training, and data augmentation strategies were introduced to improve robustness under noise contamination and missing-trace conditions. The trained models were validated on both synthetic test data and real seismic data from the Loess Plateau. The results demonstrate that all three models effectively performed automatic first-arrival picking, with the Attention-U-Net achieving the best overall performance, exhibiting superior accuracy, continuity, and robustness, particularly under strong noise and severe trace-loss conditions. Compared with conventional methods, the proposed approach produced more reliable and stable picking results and significantly reduced the need for manual correction. These findings indicate that semantic segmentation-based deep learning methods, especially those incorporating attention mechanisms, provide an effective and practical solution for high-precision first-arrival picking in complex seismic environments.

Keywords
First-arrival picking
Semantic segmentation
Deep learning
Attention-U-Net
Seismic data processing
Loess Plateau
Funding
This work was supported by the Sinopec Petroleum Engineering Geophysics Co., Ltd. Wuhan Exploration Branch 2025 Research Project (No. CIBG250096); the Open Funds for Hubei Subsurface Multi-scale Imaging Key Laboratory, School of Geophysics and Geomatics, China University of Geosciences (No. SMIL-2025-01); the Youth Project of Hubei Provincial Natural Science Foundation (No. 2025AFB409); the China Postdoctoral Science Foundation (No. 2025M780437); and the Open Fund of the Key Laboratory of Exploration Technologies for Oil and Gas Resources (Yangtze University), Ministry of Education, (No. K2023-04).
Conflict of interest
All authors are employees of SINOPEC Geophysical Corp. Jianghan Branch; however, they were not involved in any activities that could constitute a conflict of interest in relation to this study.
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Journal of Seismic Exploration, Electronic ISSN: 0963-0651 Print ISSN: 0963-0651, Published by AccScience Publishing