摘要
针对常规速度分析扫描速度范围大、精度低的缺点,采用高精度剩余速度分析方法,扫描所有地震CDP数据剩余时差,自动拾取精确的叠加速度,形成二维的叠加速度剖面。然而自动拾取会导致速度异常,进而利用局部回归法三维插值算法剔除拾取的异常速度,得到平滑的速度场。该方法提取的速度更加精确,使地震处理中水平叠加、偏移处理达到更好的效果。
In order to overcome the shortcoming of low accuracy and wide scanning speed range existed in the conventional velocity analysis, the high accuracy velocity analysis has been used to scan the residual moveout of all seismic CDP data to pick up automati- cally the accurate stacking velocity and get a 2D velocity profile. Automatic picking, however, might result in abnormal velocity. 3D interpolation with local regression method is used to eliminate the abnormal velocity and then obtain a smooth velocity field. This method can get more accurate velocity, and improve the effect of horizontal stacking and migration processing.
出处
《海洋石油》
CAS
2016年第2期37-40,共4页
Offshore Oil
关键词
速度分析
局部回归法
动校正
velocity analysis
local regression method
dynamic correction
