煤田地质与勘探2024，Vol.52Issue(11)：160-170,11.DOI:10.12363/issn.1001-1986.24.07.0482
动校正域CNN法压制自由表面多次波
Surfaced-related multiple attenuation using the CNN method in the NMO domain
摘要
Abstract
[Objective]The presence of surface-related multiples results in a lower accuracy in seismic data interpreta-tions,and the effective multiple attenuation is a key step in seismic data processing.Multiples are coherent noise signals with similar characteristics to effective signals.It is difficult impossible to distinguish multiple signals from full-wave field data using a traditional convolutional neural network(CNN).Additionally,since the surface-related multiples vary significantly with surveyed areas,the CNN method will face more severe challenges when being transferred to other net-works.[Methods]This study developed a CNN method based on the normal moveout correction(NMO)domain by in-troducing physical priors.The CNN was trained using the differences in curvature characteristics between the primary waves and multiples in the NMO domain,aiming to achieve effective multiple identification and attenuation.The per-formance of this method was tested using simulations and practical data.[Results and Conclusions]Experimental res-ults indicate that the CNN trained in the NMO domain can effectively identify and attenuate multiples while protecting the reflected signals of primary waves.Compared to the traditional Radon algorithm,the proposed method exhibits re-duced manual parameter adjustments and calculation complexity,along with less leakage of effective signals.Compared to direct end-to-end CNN-based methods for surface-related multiple attenuation,the novel method is more adaptable to new data.The results of this study can provide a new philosophy for improving the accuracy of seismic data interpreta-tions and reducing the calculation cost.关键词
自由表面多次波/卷积神经网络/动校正/相干噪声/多次波压制Key words
surface-related multiples/convolutional neural network(CNN)/normal moveout correction(NMO)/coherent noise/multiple attenuation分类
天文与地球科学引用本文复制引用
黄柱富,刘剑锋,方文倩,付丽华..动校正域CNN法压制自由表面多次波[J].煤田地质与勘探,2024,52(11):160-170,11.基金项目
国家自然科学基金项目(42274172) （42274172）
重庆市自然科学基金项目(2023NSCQ-MSX0207) （2023NSCQ-MSX0207）
广东省自然科学基金项目(2024A1515011680) （2024A1515011680）
