摘要
地震波在黏弹性介质中的吸收效应严重影响了地震波的动力学特征。对叠前地震数据而言,这种影响可以分为两部分:一部分是与深度有关的吸收影响;另一部分是与炮检距有关的吸收影响,其中对AVO分析的影响主要来自于与炮检距有关的吸收作用。在CRP道集中,通过计算非零炮检距地震道与零炮检距地震道的吸收差异,进行与炮检距有关的吸收补偿,消除了地层吸收对CRP道集横向反射特征的影响,提高了AVO分析和叠前地震反演的精度。
Dynamic characteristics of seismic reflection are seriously distorted due to viscoelastic media absorption influence.For pre-stack seismic data,this influence consists of two parts.One is related with reflection depth,and the other is related with offset.And this offset-related absorption has dominant influence on AVO analysis.The offset-related absorption can be compensated by calculating the absorption differences between nonzero-offset and zero-offset records in CRP gather.In this way, lateral variations of reflection characteristic resulted from media absorption are eliminated,and the precision of AVO analysis and prestack inversion are improved.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2014年第1期89-94,302,共6页
Oil Geophysical Prospecting
基金
国家重大科技专项(2011ZX05031-001)
国家自然科学基金课题(41174117)
国家重点基础研究发展计划“973”项目(2013CB228606)联合资助
