%0 Journal Article
%T Optimization of nonhyperbolic moveout correction equation of long-offset seismic data in VTI media<br>VTI介质长偏移距非双曲动校正公式优化
%A YOU Jian-Jun
%A CHANG Xu
%A LIU Yi-Ke
%A <br>尤建军
%A 常旭
%A 刘伊克
%J 地球物理学报
%D 2006
%I 
%X The conventional Alkhalifah moveout correction equation is characterized by low precision,and even worse it may fail to describe relation of traveltime-offset of long-offset seismic data in VTI media.Aiming at improving accuracy of the moveout correction equation of long-offset seismic data in VTI media,we analyze the Alkhalifah's NMO equation at first.Then based on the least-error principle,chart of optimal correction coefficients are calculated to compensate errors resulted from long offset cases using the conventional moveout correction equation.Therefore,the optimal Alkhalifah moveout correction equation is proposed here to improve the conventional moveout correction equation.Subsequently,we derive the travetime-offset function with a high precision model from the Fomel's group velocity equation for VTI.The moveout correction equation with high precision is put forward.Above moveout correction equations are applied to inversion calculation of anisotropic parameters from long-offset seismic data.Numerical results show that the accuracy of inversion using optimal Alkhalifah moveout equation is twice that of inversion using the conventional moveout equation,and the inversion method using the high precision moveout correction equation is the most accurate.
%K VTI media
%K Nonhyperbohc normal moveout
%K Anisotropic parameters inversion
%K Traveltime-offset function
%K Long-offset<br>VTI介质
%K 非双曲动校正方程
%K 各向异性参数反演
%K 时距关系
%K 长偏移距
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=ACB276CCED586273&yid=37904DC365DD7266&vid=2A3781E88AB1776F&iid=B31275AF3241DB2D&sid=95CBDD2EC9F49C70&eid=F7E64A4EB9091FB5&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=16&reference_num=13