%0 Journal Article
%T Table-driven 3-D angle-domain imaging approach for Kirchhoff prestack time migration<br>表驱三维角度域Kirchhoff叠前时间偏移成像方法
%A CHENG Jiu-Bing
%A WANG Nan
%A MA Zai-Tian
%A <br>程玖兵
%J 地球物理学报
%D 2009
%I 
%X To overcome some of the shortages of widely-used Kirchhoff presatck time migration technique and to provide more powerful supports for amplitude versus incidence-angle and azimuth (AVA/AVAZ) analysis, we present a 3-D angle-domain imaging approach for prestack time migration based on the ray theory. Numerical tables of one-way traveltime and propagation angle for the reflection waves are first established by improved ray-tracing algorithm in the laterally homogeneous media. After the two-way traveltimes, weighted factors, azimuth and incidence angles at the reflectors are estimated, 3-D structural images and angle-domain common-image gathers are obtained through superposition of the impulse responses in the process of prestack time migration. Unlike the conventional approach, the implementation in this paper has taken ray-bending effect and 3-D propagation property of seismic waves in the real media into account. So it helps to extract variations of amplitude and moveout versus azimuth and incidence-angle more accurately. Synthetic and real data examples demonstrate the advantage and practicability of this technique.
%K Presatck time migration
%K Angle-domain imaging
%K Azimuth
%K Incidence angle<br>叠前时间偏移
%K 角度域成像
%K 方位角
%K 入射角
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=B38597FB6B1EED026DCD366A9EF13A7E&yid=DE12191FBD62783C&vid=286FB2D22CF8D013&iid=38B194292C032A66&sid=1471D37D8144EBCF&eid=FE6645F2371CA43C&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=3&reference_num=17