摘要
为了提高垂直地震剖面(VSP)成像质量,首次将高斯束偏移方法应用于VSP观测系统。给出了基于共炮点道集的VSP叠前高斯束偏移算法,在计算高斯束参数时,若相邻高斯束中心射线超过一定距离,则采用波前重建方法,更好地解决了阴影区问题,计算效率也提高了2倍。模型试算和实际资料处理证明了高斯束偏移应用于VSP成像的可行性和有效性。
In order to improve the quality of vertical seismic profile （VSP） imaging, the Gaussian-beam migration （GBM） was applied to VSP for the first time. A VSP prestack GBM algorithm that operates on common-shot-gather was presented. During the computation of Gaussian-beam parameter, the wave-front reconstruction method is used to calculate the wave field if the distance between the central rays of the two adjacent Gaussian-beams exceeds a certain value. This method can not only resolve the problem of shadow zone, but also improve the efficiency of computation by twice. The tests on both VSP model data and VSP field data show that the application of GBM to VSP imaging is feasible and effective.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第4期29-33,共5页
Journal of China University of Petroleum(Edition of Natural Science)
基金
中国石油天然气集团公司创新基金(07E1019)
中国科学院知识创新工程重大项目(KZCX1-SW-18-04)
关键词
垂直地震剖面(VSP)
高斯束偏移
波前重建
偏移成像
vertical seismic profile（VSP）
Gaussian-beam migration
wave-front reconstruction
migration imaging
