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《Global Geology》 2011-02
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Seismic signal denoising by matching wavelet packet algorithm

WANG Pei-mao1,YANG Dong-hong2,GAO Ru3,LI An-bang1,LIU Cai41.Exploration and Development Research Institute,Northeast Branch of SINOPEC,Changchun 130062,China;2.Research Center of Palaeontology & Stratigraphy,Jilin University,Changchun 130026,China;3.Product Department of FAW Car CO.,Ltd,Changchun 130012,China;4.College of Geoexploration Science and Technology,Jilin University,Changchun 130026,China  
The signal-noise ratio is a key factor affecting the quality of seismic data.The current denoising methods are difficult in removing noise without damaging effective signals.Therefore,the denoising method based on matching algorithm is proposed.The authors use wavelet packet matching the seismic data to decompose the signals,select wave form to represent effective signals and reach to the effect of denoising.Experimental analysis shows that using matching wavelet packet algorithm can suppress the white noise in seismic data well and improve signal-noise ratio.The method denoising effect of wavelet packet algorithm is better than wavelet shrinkage threshold method,and signal-noise ratio can be improved for 5 dB when the noise energy is less than the effective signal-cycle energy.
【CateGory Index】: TN911.4
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