摘要
提出了一种新的偏移速度分析方法——基于控制照明的合成震源记录交互剩余偏移速度分析方法.与其他类似偏移速度分析方法的不同点在于:(1)叠前深度偏移采用基于波动理论的快速合成震源记录算法;(2)偏移方法采用平面波震源,与速度分析方法一致;(3)应用控制照明技术,避免了因横向变速而导致的平面波震源波场在传播过程中的畸变,从而减小了速度分析的误差;(4)实用的速度谱设计,使交互偏移速度分析可行且易于操作.模型和新疆实际资料的试算表明该方法是一种有效和实用的偏移速度分析方法.
In this paper, we present a new migration velocity analysis method--synthetic source record interactive residual migration velocity analysis method based on controlled illumination. The differences between this method and other similar methods are: (1) The fast synthetic source record algorithm based on the wave theory is adopted in prestack depth migration. (2) The plane wave source is used in migration that is consistent with the velocity analysis method. (3) By using the controlled illumination, the distortion of the plane wave source wavefield due to the lateral velocity variation is avoided therefore the error of velocity analysis is reduced and (4) the practical velocity spectrum makes the interactive migration velocity analysis feasible and convenient. The results of the model and field data of Xinjiang prove that this method is valid and practical for migration velocity analysis.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第3期860-867,共8页
Chinese Journal of Geophysics
基金
中石化东方地球物理公司研究院物探技术研究中心资助
关键词
合成震源记录
剩余偏移速度分析
平面波震源
波动理论
控制照明
Synthetic source record, Residual migration velocity analysis, Plane wave source, Wave theory,Controlled illumination