The application of modified Wavelet frequency division restructuring to petrol seismic survey data processing

The frequency domain filter method has been usually adopted in seismic data processing in order to improve the signal's signal-to-noise ratio and retention data reliable frequency band of data.Traditional Frequency domain filter are based on Fourier transformation,which may appear a false anomaly in conjunct part between the windows. Besides,during filtering noise,it's possible that some useful information will be filtered at the same time.To solve the above-mentioned problems,the paper applies wavelet frequency division restructuring to seismic survey data processing.While improving the signal-to-noise ratio,the other frequency band information is considered and the signal-to-noise ratio of processed seismic profile is improved,broadering frequency band,and resulting in a best reconstruction.This article has given the wavelet transformation and the inverse transformation numerical calculus method as well as the best wavelet and the best restructuring coefficient seeking method successively.Finally through a real case analyzed,the result shows that the method is theoretically correct and application effect is successful.