摘要
本文从实用观点出发,在延时坐标下提出了一种新的逆时偏移算法。该算法运用方向导数,把二维标量波动方程变换成形式上与Claerbout的15°方程形式完全相同的方程,从而很容易在计算机上求解。该算法无倾角限制,计算区域与15°方程的要求相同,因而计算量也基本相当。
A new algorithm for reverse-time migration in time-delayed coor- dinate system is recommended for practical use. With the use of directional derivative, this algorithm converts two-dimensional scale wave equation into the equation which is formally similar to Claerbout 15° equation, so that the equation can be easily solved by computer. This algorithm is not limited in angle and takes the same calcu- lation range as 15° equation. Therefore, it needs nearly equivalent calculation.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
1991年第6期673-678,799,共7页
Oil Geophysical Prospecting
关键词
逆时偏移
方向导数
reverse- time migration
directional derivative
