Application of frequency division processing on frequency-domain wavelet transform in deep Chuanxi Depression

Based on the research of wavelet transform in frequency domain,appropriate wavelet filters are built and a method for frequency division and reconfiguration processing on seismic data is proposed.Frequency division and reconfiguration experiments on seismic synthetic signal indicate that the method can effectively identify the signals with different frequency,and has higher resolution and accuracy.The tight clastic gas reservoir of deep Xujiahe Formation in Chuanxi Depression is characterized by deep buried depth,low dominant frequency and limited resolution of seismic data.Aiming at the problems in Chuanxi Depression,the above method was used in the seismic data processing.The processed 3D seismic data with different frequency range was applied on well-seismic calibration,wave impedance inversion and seismic attribute analysis,and good results were achieved.