The matching pursuit algorithm has higher time-frequency resolution and local adaptive capability and obtains precise position both in time and frequency domain.It is difficult to apply it in practical work due to the low-frequency shadow and low computation efficiency.This paper proposes a method to improve the calculation precision and operation efficiency of Ricker wavelet matching pursuit algorithm.The accuracy of frequency localization and time resolution of time-frequency spectrum is improved by optimizing iteration scheme which improves the calculating method of atom main frequency and compressed atom's sidelobe.The efficiency of algorithm is greatly improved by adaptive acquisition of atomic parameters.By using model experiment and actual seismic data,the effect of improved algorithm is proved.And in some thin reservoir area,the distribution of sandstone is characterized well by the time-frequency slice calculated by improved algorithm.It would help the sedimentary microfacies characterization.
Zhang T Q, Li X Y, Mark C. Estimating frequency-dependent seismic attributes by matching pursuit:a case study [C]//Las Vegas:Expanded Abstracts of the 78 th Annual SEG Meeting,Society of Exploration Geophysicists , 2008: 3023-3027.
Mallat S G, Zhang Z F . Matching pursuits with time-frequency dictionaries[J]. IEEE Transactions on Signal Processing, 1993,41(12):3397-3415.
doi: 10.1109/78.258082
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