速度误差和地震噪声对最小二乘逆时偏移的影响分析

马振, 孙成禹, 彭鹏鹏, 姚振岸

An analysis of the influence of velocity error and seismic noise on least squares reverse-time migration

Zhen MA, Cheng-Yu SUN, Peng-Peng PENG, Zhen-An YAO

图7 不同平滑程度的偏移速度最小二乘逆时偏移成像结果 a—速度未做平滑;b—e=2.7%的平滑速度;c—e=5.24%的平滑速度;d—e=7.28%的平滑速度

Fig.7 Least squares reverse-time migration imaging results with different smooth migration velocity a—velocity without smoothness;b—e=2.7% smoothing speed;c—e=5.24% smoothing speed;d—e=7.28% smoothing speed