基于Born近似的角度域共成像点道集

偏移距域共成像道集和炮域共成像道集在复杂地区存在运动学和动力学假象,Born近似傅里叶偏移方法基于小扰动假设引入参考慢度可以适应横向变速.利用频率波数域与空间频率域混合域偏移算子和波场的窗口傅里叶框架展开与重构,提出了局部角度域共成像点道集方法,改善了局部成像质量,有效地消除了假象,为偏移速度分析和振幅随入射角的关系分析提供了有效的支持.

Angle-domain common image gathers based on Born approximation

Based on the fact that there are kinematic and kinetic pseudomorphs of the common imaging point gathers in offset and shot domains in complex area,a local angle-domain common image gather method is proposed.This method improves the local image quality and effectively eliminates the pseudomorphs,which provides effective support for the migration velocity analysis and amplitude—incident angle relationship analysis.