Interval Q inversion based on zero-offset VSP data and applications
Zhang Gu-Lan1,2, Wang Xi-Ming2, He Zhen-Hua1, Cao Jun-Xing1, Li Ke-En3, and Rong Jiao-Jun2
1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, 610059, China.
2. BGP, CNPC, Zhuozhou 072751, China.
3. Hunan?Huasheng?Energy?Investment?and?Development?Co.?Ltd., Changsha 410000, China.
Abstract：
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.
ZHANG Gu-Lan,WANG Xi-Ming,HE Zhen-Hua et al. Interval Q inversion based on zero-offset VSP data and applications[J]. APPLIED GEOPHYSICS, 2014, 11(2): 235-244.
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2014, Vol. 11 
