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Pseudo-3D Receiver Deghosting of Seismic Streamer Data by Sparse Transform Based L1 Norm ConstraintNormal access

Authors: B. Hu, D. Wang, H. Xiao, Q. Li, J. Sun and T. Wang
Event name: 81st EAGE Conference and Exhibition 2019
Session: Poster: Signal Processing A
Publication date: 03 June 2019
DOI: 10.3997/2214-4609.201901382
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 827.73Kb )
Price: € 20

Summary:
Ghost is unavoidable in marine seismic data acquisition, limiting the bandwidth of useful information and reducing the resolution of imaging results. In the deghosting method, the 3D algorithms can better eliminate the 3D effect compared with the conventional 2D algorithm. However, the 3D algorithm requires dense sampling in the crossline direction, which means greater storage space and computational cost. In this paper, we propose a pseudo-3D deghosting method to get rid of the limitation of dense spatial sampling. We arrange the conventional 2D multi-shot gathers in the form of 3D data cube by time, offset and shot number to achieve simultaneous deghosting for multi-shot gathers; We also introduce a sparse transform based L1 constraint to avoid local minimum. The basic idea of our method is including the information of the common offset gathers (COGs) into the deghosting to improve the inversion accuracy. The proposed method is easy to implemented without any pre-processing, and field example demonstrates the effectiveness of the proposed method.


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