摘要
转换波共转换点 (CommonConversionPoint简称CCP)叠加的关键在于CCP抽道集和非双曲线正常时差校正NMO(NormalMoveOut) .目前方法的精度限制了其在中 -浅层或大炮检距情况下的应用 .我们对CCP叠加技术进行了系统研究 ,导出了新的CCP位置计算公式和非双曲线时距关系式 ,并给出了具体的CCP抽道集方法 .理论模型试验和实验资料处理表明本文方法精度高、简便易行 ,特别是对于中 -浅层和大炮检距情况也能得到良好的叠加效果 .
Common conversion point (CCP) binning and non hyperbolic normal moveout (NMO) are two key points to CCP stacking for converted waves. The accuracy of the existing methods is too low to be used for shallow middle events or for large offsets. After studying CCP stacking technique in details, we presented new formulas for CCP points and non hyperbolic time distance relation, and as well, gave an implementation for CCP binning. The tests of synthetic model and processing of real data proved that our method is accurate and easy to be implemented. The stacking is good enough even for shallow middle events and for large offsets.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期557-574,共18页
Chinese Journal of Geophysics
基金
国家自然科学基金"九五"重大项目 ( 49894 190 - 2 8)
中国海洋石油总公司"九五"重点攻关项目
