3D seismic data reconstruction based on a fast structure dictionary learning method
LAN Nanying1, ZHANG Fanchang1, ZHANG Yiming2, QIN Guangsheng3, DING Jicai2
1. School of Geoscience, China University of Petroleum(East China), Qingdao, Shandong 266580, China; 2. CNOOC Research Institute Co. Ltd, Beijing 100028, China; 3. SINOPEC Zhongyuan Oilfield, Puyang, Henan 457099, China
Abstract:Currently,the 3D seismic data reconstruction methods based on dictionary learning usually reconstruct the data slice by slice.This strategy neglects the correlation between slices,and doesn't make full use of the continuity constraints in various directions of seismic data.To solve this problem,a 3D joint reconstruction method based on fast structure dictionary learning was proposed.Under the framework of compressive sensing theory,the method uses fast structure dictionary learning algorithm to train the training set in order to generate a 3D adaptive dictionary,and then reconstruct the data with high precision using 3D adaptive dictionary,observation matrix and regularized orthogonal matching pursuit algorithm.The reconstruction results of model data and real data demonstrated that the method can recover the detailed characteristics of seismic data with high precision and good performance on amplitude preservation.
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