Abstract：Since the seismic signal unavoidably contains various noises,and instantaneous frequency is sensible to noise and easily causes the false phenomenon.The paper discussed the time-frequency distribution based on Morlet wavelet match tracing algorithm.Isochronic-frequncy attribute of instantaneous frequency extracted on that basis has good anti-noise capacity.The paper gave the concrete algorithm flow,and synthetic data test and results of practical data application showed that using the time-frequency attribute extracted from the method in the paper has good effect in the aspect of recognition of sea-bottom shallow gas.
