在频率波数域实现三维叠前深度偏移  

Realization of 3D prestack depth migration in frequency-wavenumber domain

作　　者：梁鸿[1] 何潮观[1] 仝兆岐[1] 

机构地区：[1]中国石油大学计算机与通信工程学院,山东东营257061

出　　处：《中国石油大学学报（自然科学版）》2008年第6期62-65,共4页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油天然气集团公司中青年创新基金(07E1024)

摘　　要：叠前深度偏移是理想的改善复杂地区和强横向速度变化的地震资料成像技术,对于复杂变速介质成像,常用的时间域成像方法已不能满足实际需要,必须借助于深度域成像方法,特别是三维地震叠前深度偏移方法。推导了三维叠前深度波场延拓算子公式,指出其实质含义,并通过模型测试进行了验证,介绍了一种三维叠前深度偏移的实现方法,最后进行了偏移算子的误差分析。理论分析与实例计算表明,该计算方法是合理和有效的。Prestack depth migration is an imaging technique of seismic data which can adapt to lateral velocity variation in complex districts. For complex variable velocity mediums, time domain imaging method can not satisfy actual requirements, and prestack depth migration must be used. The calculation procedure for continuation operator of 3D prestack depth migration was derived and its actual meaning was given, which were also proven by model test. The implementing method of 3D prestack depth migration was introduced. Lastly, migration operator＇s error was analyzed. The theory analysis and illustration calculation results verify rationality and validity of this method.

关 键 词：地震资料处理 三维叠前深度偏移 外推算子 误差分析 

分 类 号：TE19[石油与天然气工程—油气勘探]