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ISSN 2096-7780 CN 10-1665/P

地震信号时频分析方法研究综述

A review of time-frequency analysis for seismic signal

  • 摘要: 时频分析是地震资料处理的关键技术,随着地震勘探的深入,对高分辨率时频分析的需求日益迫切。本文综述了近年来时频分析方法的发展历程,首先探讨了传统方法的局限性,如时间分辨率和频率分辨率的权衡。随后,从分数域和压缩感知两个维度出发,详细阐述了时频分析的最新进展。分数阶时频分析通过引入分数阶概念,提供了更精细的时频表示,有助于揭示地震信号的复杂特征。压缩感知理论则利用信号的稀疏性,通过优化算法实现信号重建与时频表示。此外,本文还阐述了基于深度学习的地震信号时频分析的研究现状、优势及不足。深度学习方法在稀疏时频分析、去噪、信号增强及储层预测等方面展现出强大的表征能力和泛化性能,为地震勘探领域带来了新的突破。最后,本文对当前地震勘探领域中的时频分析方法进行了总结,并对未来的发展方向进行了展望,以期为推动地震勘探技术的发展提供有益的参考。

     

    Abstract: Time-frequency analysis is a key technology in seismic data processing, and with the deepening of seismic exploration, the demand for high-resolution time-frequency analysis is becoming increasingly urgent. This paper reviews the development process of time-frequency analysis methods in recent years, and first explores the limitations of traditional methods, such as the trade-off between time resolution and frequency resolution. Subsequently, the latest developments in time-frequency analysis are elaborated in detail from two dimensions: fractional domain and compressive sensing. Fractional-order time-frequency analysis provides a more refined time-frequency representation by introducing the concept of fractional order, which helps to reveal the complex characteristics of seismic signals. The compressive sensing theory utilizes the sparsity of signals and optimizes algorithms to achieve signal reconstruction and time-frequency representation. In addition, the paper also elaborates on the research status, advantages, and shortcomings of deep learning-based time-frequency analysis of seismic signals. Deep learning methods have demonstrated strong representation capabilities and generalization performance in sparse time-frequency analysis, denoising, signal enhancement, and reservoir prediction, bringing new breakthroughs to the field of seismic exploration. Finally, this paper summarizes the time-frequency analysis methods in the current field of seismic exploration and looks forward to future development directions, in order to provide valuable references for promoting the development of seismic exploration technology.

     

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