%0 Journal Article
%T On the method of quality factors estimation from zero-offset VSP data<br>利用零偏移VSP资料估计介质品质因子方法研究
%A GAO Jing-Huai
%A YANG Sen-Lin
%A <br>高静怀
%A 杨森林
%J 地球物理学报
%D 2007
%I 
%X Quality factors of zero-offset VSP data are estimated by peak frequency shift (PFS) method. The approach employs Ricker wavelet and matching seismic wavelet to approximate zero-phase source wavelet and mixed-phase source wavelet respectively, and formulas for Q-values estimation with PFS method are obtained. Moreover, focusing on the problem that peak frequencies of seismic wavelets calculated by common methods are imprecise, eigen-struct (ES) method for estimating peak frequencies of seismic wavelets is proposed. The validity of PFS method for Q-values estimation is verified through simulation of synthetic zero-offset VSP data. Results indicate that peak frequencies and Q-values derived from ES method are more precise than those derived from methods of fast Fourier transform and Burg's maximum entropy. Results also make clear that Q-values estimation with PFS method needs to choose appropriate parameters of wavelet, or precision of Q-values estimation will be affected.
%K Quality factor (Q)
%K Peak frequency
%K Attenuation
%K Matching seismic wavelet (MSW)<br>品质因子
%K 峰值频率
%K 衰减
%K 匹配地震子波
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=6D7186C6C4875629&yid=A732AF04DDA03BB3&vid=771152D1ADC1C0EB&iid=E158A972A605785F&sid=9978E8308B7F7CE6&eid=B169842BD52221DD&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=10&reference_num=18