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A improved Chebyshev Optimal Matching Pursuit Algorithm for Dynamic Correction
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
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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