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    基于全局-局部特征提取的自监督三维地震数据重建方法

    Global-Local Feature Extraction Based Self-Supervised 3D Seismic Data Reconstruction Method

    • 摘要: 地震勘探是当前全球油气勘探的重要技术。然而,由于复杂的环境和经济等因素限制,采集到的地震数据通常存在缺失道,可能对后续的地震信号处理任务带来挑战。近年来,受益于卷积神经网络(Convolutional Neural Network,CNN)出色的特征提取能力,基于CNN的方法已在地震数据重建中取得一定成功。然而,受限于CNN的局部感受野,这类方法主要关注局部特征,忽略全局信息。此外,有监督方法需要高质量成对训练数据,这对三维地震数据是一大挑战。针对以上问题,本研究提出了一种基于自监督训练的联合Swin Transformer和CNN的重建算法STC-Net,通过提取和融合全局与局部特征重建不完整三维地震数据。研究形成了从CNN特征提取能力分析、观测系统局部与全局特征融合策略,到三维地震数据重建性能评估的完整过程。实验结果表明,相较传统方法和基于CNN的方法,STC-Net在重建不完整三维地震数据任务中展现了更优性能。

       

      Abstract: Due to complex environmental and economic constraints, seismic records often contain missing traces, which could cause some challenges for subsequent seismic signal processing tasks. In recent years, owing to the outstanding feature extraction capabilities of Convolutional Neural Networks (CNNS), CNN-based methods have achieved a certain level of success in seismic trace reconstruction tasks. However, due to the limitation of the CNN's local receptive field, CNN-based methods focus on extracting local features and ignore global features. In addition, supervised methods for training networks require high quality data pairs, which is a challenging task for 3D seismic data. To solve the above problems, this paper proposes a reconstruction algorithm STC-Net based on self-supervised training combined with Swin Transformer and CNN. Through the extraction and fusion of global and local features, incomplete 3D seismic data could be reconstructed. Experimental results show that the proposed global-local feature extraction algorithm has better signal reconstruction capability compare with traditional methods and CNN-based methods.

       

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