Abstract
Seismic data regularization is an important preprocessing step in seismic signal processing. Traditional seismic acquisition methods follow the Shannon-Nyquist sampling theorem, whereas compressive sensing (CS) provides a fundamentally new paradigm to overcome limitations in data acquisition. Besides the sparse representation of seismic signal in some transform domain and the 1-norm reconstruction algorithm, the seismic data regularization quality of CS-based techniques strongly depends on random undersampling schemes. For 2D seismic data, discrete uniform-based methods have been investigated, where some seismic traces are randomly sampled with an equal probability. However, in theory and practice, some seismic traces with different probability are required to be sampled for satisfying the assumptions in CS. Therefore, designing new undersampling schemes is imperative. We propose a Bernoulli-based random undersampling scheme and its jittered version to determine the regular traces that are randomly sampled with different probability, while both schemes comply with the Bernoulli process distribution. We performed experiments using the Fourier and curvelet transforms and the spectral projected gradient reconstruction algorithm for 1-norm (SPGL1), and ten different random seeds. According to the signal-to-noise ratio (SNR) between the original and reconstructed seismic data, the detailed experimental results from 2D numerical and physical simulation data show that the proposed novel schemes perform overall better than the discrete uniform schemes.
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This paper was financially supported by The 2011 Prospective Research Project of SINOPEC (P11096).
Cai Rui, Senior engineer, she is with Sinopec Geophysical Research Institute and Sinopec Key Laboratory of Geophysics. Her research interests are seismic data processing and reservoir prediction.
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Cai, R., Zhao, Q., She, DP. et al. Bernoulli-based random undersampling schemes for 2D seismic data regularization. Appl. Geophys. 11, 321–330 (2014). https://doi.org/10.1007/s11770-014-0447-z
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DOI: https://doi.org/10.1007/s11770-014-0447-z