Oil & Gas Geology ›› 2009, Vol. 30 ›› Issue (2): 236-239.doi: 10.11743/ogg20090216

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Optimal generalized S-transform and its application to hydrocarbon detection

Shi Yanhong, Bian Li'en, He Zhenhua   

  1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2009-01-10 Online:2009-04-25 Published:2012-01-16

Abstract:

Time-frequency analysis is one of the important means for direct hydrocarbon detection with seismic data.Real seismic signals are non-stationary and shortcomings and deficiencies exist in conventional time-frequency analysis methods such as short-time Fourier transform,Gabor transform and wavelet transform.To tackle these problems,a new time-frequency analysis method-optimal generalized S-transform-is achieved by adding a new parameter "p" in S-transform to adjust the standard deviation of window function and selecting the optimal value of p according to the measurement criteria of the time-frequency aggregation proposed by Jones and Parks.Trial calculation with synthetic signals shows that this method has a better time-frequency aggregation than conventional time-frequency analysis methods.Application of this method to actual seismic data shows that the frequency-division data volume generated by this method is effective in hydrocarbon detection and identification.

Key words: time-frequency analysis, non-stationary signal, optimal generalized S-transform, frequency-division profile, hydrocarbon detection

CLC Number: