摘要
共反射面元 (CommonReflectionSurface)叠加是一种不依赖于宏观速度模型的零炮检距剖面成像方法 ,实现共反射面元叠加依赖于 3个波场属性参数的确定 ,它们分别是零偏移距射线的出射角α、Normal波和NormalInci dentPoint波出射到地表的波前曲率半径RN 和RNIP.在CRS叠加的理论基础上 ,本文阐述如何在实际数据上实现CRS叠加 .首先 ,通过简洁的一维相关性分析在常规叠加剖面上找到对应该共反射面元的一组初始波场属性参数(α ,RN,RNIP) ,然后在对应的叠前数据上应用最优化算法对这组参数进行优化处理 ,相比初始属性参数 ,优化后的属性参数能够更好地聚集来自地下反射层的能量 ,最后应用优化后的属性参数实现最优CRS叠加 .
Common reflection surface (CRS) stack is a macro-model independent seismic imaging method. Performing CRS stack depends on determination of three attributes which are the angle of emergence (α) and the radii of curvature of the NIP-wave (R NIP ) and the normal-wave (R N). After a detailed introduction about practical theoretical foundation of CRS stack in paper Ⅰ, here a detailed description of implementing CRS stack on real data will be presented. Firstly, initial parameter triplet (α,R N,R NIP ) can be determined by a concise one-dimensional coherency analysis on CMP stack section, then a three-parametric optimization method will be performed on the corresponding prestack data space, the optimized attributes are much better suited to collect energy from underground reflector than initial attributes. The final CRS stack section results from optimized attributes.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第2期327-331,T007,共6页
Chinese Journal of Geophysics
基金
国家自然科学基金与大庆石油管理局联合资助项目 ( 4 9894190 -2 4)
