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A improved Chebyshev Optimal Matching Pursuit Algorithm for Dynamic CorrectionNormal access

Authors: W. Wang, Y. An, Z. Li, K. Jiang and J. Li
Event name: 80th EAGE Conference and Exhibition 2018
Session: Seismic Signal Processing, Stacking and Move-Out Corrections
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201801111
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.45Mb )
Price: € 20

Summary:
Conventional NMO correction applied to CMP gathers with long-offset usually causes wavelet stretching that debases the frequency content of the NMO corrected data. In order to reduce the phenomenon of dynamic correction stretching, this paper starts from the time-distance curve and uses Chebyshev polynomial truncation equation. Using matching pursuit algorithm, the Ricker wavelet is used as the atom to determine the control parameters, and the scanning range is determined by instantaneous characteristics. The improved matching pursuit algorithm is used in the model and field data, Results indicate that this method provides nonstretched NMO data with relatively higher precision.


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