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基于控制照明的合成震源记录交互剩余偏移速度分析
引用本文:王昌龙,张叔伦,赵景霞,杨其强.基于控制照明的合成震源记录交互剩余偏移速度分析[J].地球物理学报,2007,50(3):860-867.
作者姓名:王昌龙  张叔伦  赵景霞  杨其强
作者单位:大连理工大学应用数学系, 大连116024
基金项目:中石化东方地球物理公司研究院物探技术研究中心资助
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.

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  
文章编号:0001-5733(2007)03-0860-08
收稿时间:2006-1-12
修稿时间:2006-01-12

Synthetic source record interactive residual migration velocity analysis based on controlled illumination
WANG Chang-Long,ZHANG Shu-Lun,ZHAO Jing-Xia,YANG Qi-Qiang.Synthetic source record interactive residual migration velocity analysis based on controlled illumination[J].Chinese Journal of Geophysics,2007,50(3):860-867.
Authors:WANG Chang-Long  ZHANG Shu-Lun  ZHAO Jing-Xia  YANG Qi-Qiang
Institution:Department of Applied Mathematics, Dalian University of Technology, Dalian 116024, China
Abstract:zIn 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.
Keywords:Synthetic source record  Residual migration velocity analysis  Plane wave source  Wave theory  Controlled illumination
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