Application of wavelet transform in simultaneous improvement of signal-to-noise ratio and resolution

摘要

New high-resolution seismic data processing methods have been applied to make up for the insufficiency in commercial seismic data processing system. To weaken the effect of noises, nonlinear filter-2D noise elimination operator is adopted in different frequency band to enhance the ratio of signal-to-noise. Then wavelet transform technique is used to extract the seismic wavelet in the homo-morphism domain and then calculate the inverse wavelet, which can get around the difficulty in the determination of filter length in the conventional homomorphism method. Practical application proves the validity of our method.