摘要
共反射面 (CRS)叠加是一种与宏观速度模型无关 ,仅依赖于近地表速度的地震成像方法 .其通过地震三参数的优化实现地震成像 .本文推导了基于CRS叠加得出的优化三参数与偏移速度之间的解析关系 ,提出了在CRS道集通过优化三参数实现速度估计的CRS道集偏移速度建模方法 .模型试算表明 ,这种速度建模方法效率较高 ,速度分析精度取决于优化三参数的精度 。
The common reflection surface (CRS) stack is a new seismic imaging method, which depends on near surface velocity instead of macro velocity model. According to optimized three parameters obtained by CRS stacking, we derived an analytical relationship between three parameters and migration velocity field, and put forward CRS gather migration velocity modeling method, which realize velocity estimation by optimized three parameters in CRS gather. The test of a sag model proved that the method is more effective and adaptable for the velocity modeling of a complex geological body, and the accuracy of velocity analysis depends on the precision of optimized three parameters.
出处
《地震学报》
CSCD
北大核心
2003年第4期406-414,共9页
Acta Seismologica Sinica
基金
国家自然科学基金( 4 9894 190 0 2 4 )
大庆油田有限公司资助
