摘要
本文把最佳拟合算法(三点和五点差分格式)及串联偏移方法应用在15°波动方程偏移中。由于拟合法的差分因子随着采样间隔、步长、速度等参数的变化而变化,因此与原有的波动方程差分偏移法相比,串联偏移方法能有效的使大倾角归位,克服频散,速度及步长可以灵活变化,运算效率高等优点。
This paper discusses the implementation of the optimal fitting algorithm (3-point and 5-point difference schemes) and cascade migration Since the difference operator of the fitting method varies with the sample interval,step length and velocity,etc.,the cascade migration can effectively move the reflector with large dip into its true subsurface position.Compared with the conventional difference method,the fitting method has the advantages of low frequency dispersion,flexible selection of velocity and step length and of high computation efficiency.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第5期651-656,共6页
Chinese Journal of Geophysics
基金
国家自然科学基金会、中国科学院、石油天然气总公司、大庆石油管理局联合资助的课题。
关键词
拟合法求解差分因子
15°方程串联偏移
三点和五点差分格式
3-point and 5-point difference schemes
15°finite difference wave equation cascade migration
Fitting method difference operator
