Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (2): 594-602.doi: 10.13278/j.cnki.jjuese.201602303

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Attenuation Compensation Method of Seismic Wave in the Local Time-Frequency Transform Domain

Liu Yang, Li Bingxiu, Liu Cai, Chen Changle, Yang Xueting   

  1. GeoExploration of Science and Technology, Jilin University, Changchun 130026, China
  • Received:2015-05-18 Published:2016-03-26
  • Supported by:

    Supported by National Natural Science Foundation of China (41274119,41430322)and National High Technology Research and Development Program of China (2012AA09A2010)

Abstract:

Seismic signal will decay when spreading under the ground, which will decrease the resolution ratio of seismic data. The attenuation compensation of seismic wave is an important step in seismic datum processing. The proposed attenuation compensation method is based on the local time-frequency transform (LTFT) which allows the user to choose a range or sample interval of the frequency. As a result, it performs well in time-frequency analysis and solves the problem of fixed-windows STFT and the precise estimates of the frequency, which cannot be provided by expansion coefficients in a wavelet frame. The spectrum ratio method is widely used for its convenience and effectivity. Besides we choose the earth filtering operator based on the Kolsky attenuation model. The result of theoretical model and real data trials show that the seismic wave compensation method based on LTFT can compensate the attenuation of seismic signal especially in a deep stratum and improve the resolution of seismic data efficiently.

Key words: non-stationary signal, local time-frequency transform, attenuation compensation, spectrum ratio method

CLC Number: 

  • P631.4

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