摘要
等时面是地震波时间场的等值面,是Kirchhoff型数值模拟及Kirchhoff型偏移与反偏移的数据叠加或数据分布曲面,其几何形状和局部曲率对于Kirchhoff型真振幅偏移和反偏移中的加权函数计算和成像效果具有重要的影响。本文推导了均匀和梯度介质中的等时线公式并计算了二维均匀和梯度介质中等时线的几何特征。
Isochrones are the isochronal surfaces of the time field of seismic waves.They are stacking and distribution surfaces in Kirchhoff—type modeling and migration as well as in Kirchhoff—type demigration.Their shape and curvature have significant influence on the computation of the weighting functions in Kirchhoff—type true—amplitude migration and demigration,and on the imaging results as well.In this paper we derive the formulas for the isochrones in homogeneous and gradient media,and give some numerical results on the geometrical features of isochrones.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2006年第S2期117-120,129,共5页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(40574052)
关键词
等时线
几何特性
均匀介质
梯度介质
isochrones
geometrical features
homogeneous media
gradient media
