Variable resolution matching pursuit spectrum imaging of seismic signals

Matching pursuit time-frequency characterization method based on traditional Morlet time-frequency atoms dictionary cannot adjust the time-frequency resolution, which limits the application on actual data. In order to solve the problem, we introduced resolution adjustment parameter to make the time-frequency resolution of Morlet wavelet flexible and controllable. On this basis, the variable resolution matching pursuit time-frequency characterization method was developed to realize adjustable for time resolution and frequency resolution. In the spectrum imaging of thin reservoir, our method was used to enhance the time resolution of matching pursuit time-frequency distribution, which can effectively avoid the interference of complex geological background and achieve a clear image of thin reservoir.