Seismic Data Gabor Transform Wavelet Scaling And Deconvolution Processing Method And Application In Coalfield

In all stages of coal field exploration,in order to ensure safe and efficient mining,the development of small structures in the mining area must be ascertained.Among them,the fine characterization of thin coal seams and small faults with a drop of 3 to 5 m has become the difficulty of coal field seismic data processing.Since the seismic signal is a non-stationary signal,the propagation of seismic waves has time-varying characteristics.Based on the analysis of the Gabor transform principle,this paper uses the time-frequency analysis method to study the Gabor wavelet scaling and Gabor deconvolution method to improve the seismicity of coal fields.The vertical resolution of the data.Use Gabor transform to transform seismic data from time domain to frequency domain,perform 2D smooth estimation of the frequency spectrum of the wavelet on the seismic trace in the frequency domain,perform scaling on the wavelet spectrum by adjusting the scale factor,and perform a natural logarithmic spectrum of the seismic wavelet.The Albert transform finds its phase function,which makes the wavelet significantly narrower.When performing Gabor deconvolution,the smoothed seismic trace spectrum is used as the wavelet spectrum,and the original seismic trace spectrum is divided by the wavelet spectrum in the frequency domain to obtain the higher resolution reflectance coefficient sequence,and then Gabor inverse The transformation realizes the improvement of the longitudinal resolution of the seismic signal.Gabor wavelet scaling and deconvolution methods are used to process the simulated data and actual seismic data of coal fields.After processing,the wavelet becomes narrower,the seismic signal frequency band becomes wider,and the main frequency is increased,which greatly improves the longitudinal resolution of seismic data.At the same time,Gabor deconvolution can correct wavelet shape and viscoelastic attenuation,and it also has a good compensation effect for deep seismic signals under strong shielding in coal fields.There are 43 pictures,7 tables and 96 references in this article.