%0 Journal Article
%T Converted-wave pre-stack time migration in volcanic area<br>火山岩地震屏蔽层的转换波叠前时间偏移成像
%A XIE Fei
%A CHANG Xu
%A LIU Yi-Ke
%A <br>谢飞
%J 地球物理学报
%D 2008
%I 
%X How to get exact common converted points is a key problem in processing reflection seismic converted wave data.Using pre-stack time migration technology(PSTM),we can exactly image the converted waves on the true reflection points and avoid sorting common converted point(CCP) gathers.In this paper,we research the imaging problems beneath volcanic area.We sort common asymptotic conversion point(CACP) gathers and perform velocity analysis to establish the initial velocity which will be used in PSTM.By scanning migration velocity and Vp/Vs,we get the optimum migration velocity and Vp/Vs.Using real data from a seismic exploration,we achieved the migration sections of converted wave beneath volcanic area,and it is proved that the method is effective for computing common asymptotic conversion point and pre-stack time migration.
%K OBC
%K Pre-stack time migration(PSTM)
%K Common Converted Point(CCP)
%K Common Asymptotic Conversion Point(CACP)
%K Velocity scanning
%K Vp/Vs scanning
%K Volcanic<br>OBC数据处理
%K 克希霍夫叠前时间偏移技术
%K 共转换点
%K 共近似转换点
%K 偏移速度扫描
%K 纵、横波速度比值扫描
%K 火山岩
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=40602191D81D9AE4F47832E05286B4B2&yid=67289AFF6305E306&vid=987EDA49D8A7A635&iid=B31275AF3241DB2D&sid=5349C9BD3C454FC9&eid=3243429ECEACC611&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=6&reference_num=17