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Seismic random noise attenuation using multi-scale sparse dictionary learning

JINWEI FANG1 ,  LIANG ZHANG2* ,  HUI ZHOU3 ,  SHENGDONG LIU1 ,  BO WANG1 ,  WENJIE CHEN4
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1 State Key Laboratory of Deep Geomechanics & Underground Engineering, School of Resource and Earth Science, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, P.R. China,
2 Institute of Geosciences and Info-Physics, Central South University, Changsha, Hunan, 410083, P.R. China,
3 State Key Laboratory of Petroleum Resources and Prospecting, CNPC Key Lab of Geophysical Exploration, China University of Petroleum, Changping 102249, Beijing, P.R. China,
4 College of Information Technology, Guangxi Police College, Nanning, Guangxi 530028, P.R. China,
JSE 2022, 31(2), 177–202;
Submitted: 27 August 2021 | Accepted: 1 February 2022 | Published: 1 April 2022
© 2022 by the Authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
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Abstract

Fang, J.W., Zhang, L., Zhou, H., Liu, Z.D., Wang, B. and Chen, W.J., 2022. Seismic random noise attenuation using multi-scale sparse dictionary learning. Journal of Seismic Exploration, 31: 177-202. Seismic data contain random noise, which affects data processing and interpretation and possibly limits the use of seismic data in parameter building and attribute prediction. To effectively remove such noise, we develop a denoising workflow based on multi-scale sparse dictionary learning. The multi-scale sparse dictionary learning method decreases the complexity of data by two approaches. One is seismic data-sparse representation from the data domain to the wavelet domain by wavelet bases. The other is denoising by sparse dictionary learning in a certain frequency band without the noise effect from other frequency bands. Meanwhile, the wavelet transform can also reduce the dimension of the data, which ensures the computational efficiency of the proposed method. After analyzing the effects of sparse dictionary learning parameters on seismic data denoising, we test the proposed method on two synthetic and two field datasets. We learn from the examples that our approach can effectively recover signals from simulated and real noisy data, as well as time-variant noisy data. Compared with the sparse dictionary learning, K-singular value decomposition dictionary learning, and double-sparsity dictionary (DSD), our method can obtain the best-denoised result with less effective signals leaking in noise sections.

Keywords
sparse dictionary learning
wavelet transform
multi-scale denoising
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Journal of Seismic Exploration, Print ISSN: 0963-0651, Published by AccScience Publishing
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