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The Improvement of Dynamic Matching Pursuit Algorithm and its Application of Gas Reservoir Prediction
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Matching pursuit algorithm is widely applied to the field of geophysics owing to the self-adaptive decomposition characteristics and high time-frequency resolution. Based on the complex dynamic matching pursuit, this paper discusses the principles of the dual-parameter dynamic fast matching pursuit algorithm and workflows. Given that the instantaneous frequency obtained with the conventional method has negative phenomena and shortcomings of poor robustness, we propose the solving method of the instantaneous frequency through the introduction of a continuous phase and the help of damped least squares method. What’s more, the corresponding calculating algorithm is presented. The numerical data tests show that the instantaneous frequency obtained with the continuous phase has high robustness and avoids negative anomalies. Then we apply the improved matching pursuit algorithm to time-frequency analysis. Numerical and field data tests demonstrate that the improved matching pursuit algorithm has high time-frequency resolution. Finally, we analyze the changes in the gas reservoir at different frequencies through the spectral decomposition with the improved matching pursuit algorithm. This indicates that spectral decomposition technique can characterize the position of the gas reservoir well.