Abstract：Fourier transform with time parameter t* favours identifying the wavelet frequency spectra of different phases,but fails to part different wavelets.t*-Ψ curve that is plotted using both theoretical wave revision function and fuzzy recognition can be applied to the identification of full wave phases,and its reliability is better than that of raw seismic record,Ψ,ranging from 0 to 1,represents dimensionless membership function.If Ψ=1,wavelets appear at time t*; if Ψ=0,no wavelet appears at *; and if 0<Ψ<1,the possibility of wavelet appearance increases with the decrease of difference between Ψ and 1.Theoretical wave revision function varies with amplitude revision coefficient;therefore,it can tale many forms to achieve the identification of aii phnses,Both the dispersion of viscoetastic mediums and the influence of wavelet stack should be considered in determining theoretical wave revision. function,This method favours rnulti一trace analysis and multiple wave identification.Combined with the mrethod described in literature[1],this method can enhance frequency spectrum characteristics of identified wavelets and improve image display.
