%0 Journal Article
%T Scanning analysis of effective Q using generalized S transform<br>利用广义S变换进行等效Q值扫描分析
%A LI Xue-ying
%A SUN Dan
%A JING Yong-quan
%A LU Bao-kun
%A YANG Xiao-long
%A CHEN Yong
%A <br>李雪英
%J 地球物理学进展
%D 2009
%I 
%X A new method of determining effective Q is presented for the first time which is combined with the generalized S transform and scanning analysis technique. It differs substantially from traditional Q estimation methods in that prestack time migration is adopted to compensating for seismic data, which has been attenuated as a result of intrinsic absorption, by using a series of effective Q factors. Common reflection point gathers are stacked in order to form the stacked profile. A stacked trace chosen from the stacked profile is analyzed by using generalize S transform to gain the time-frequency spectrum and peak frequency of Fourier spectrum. A shallow strong reflection can be selected as a reference time-frequency spectrum. This reference spectrum is compared with the target reflection at different depths. A standard is established for choosing accurately effective Q when the spectrum width and peak frequency of Fourier spectrum are consistent with reference spectrum. As a result, a new technique for analyzing effective Q of macro-media is established.
%K anelastic media
%K time migration
%K generalized S transform
%K effective quality factor
%K scanning analysis<br>粘性介质
%K 时间偏移
%K 广义S变换
%K 等效Q值
%K 扫描分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=65CE641AB2DEAAF8B2D39ECB6B6B6C80&aid=319E6A6147045EA61469860A314981A6&yid=DE12191FBD62783C&vid=B91E8C6D6FE990DB&iid=94C357A881DFC066&sid=EB4751E019AF0441&eid=FC8D65835446970D&journal_id=1004-2903&journal_name=地球物理学进展&referenced_num=3&reference_num=20