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Zhang, Gu-Lan; Wang, Xi-Ming; He, Zhen-Hua; Cao, Jun-Xing; Li, Ke-En; Rong, Jiao-Jun
Applied geophysics, 06/2014, Letnik: 11, Številka: 2Journal Article
In order to obtain stable interval Q factor, by analyzing the spectrum of monitoring wavelet and down-going wavelet of zero-offset VSP data and referring the spectrum expression of Ricker wavelet, we propose a new expression of source wavelet spectrum. Basing on the new expression, we present improved amplitude spectral fitting and spectral ratio methods for interval Q inversion based on zero-offset VSP data, and the sequence for processing the zero-offset VSP data. Subsequently, we apply the proposed methods to real zero-offset VSP data, and carry out prestack inverse Q filtering to zero-offset VSP data and surface seismic data for amplitude compensation with the estimated Q value.
