广角地震反射数据特征及校正方法研究
|
摘要
本文从Zoeppritz方程出发,讨论了广角地震反射数据的振幅和相位特征及其影响因素,并选用单一界面模型和薄储层模型,说明广角反射与小角度反射在地震道集上的主要区别,进而阐述了广角地震数据进行时差校正和相位校正的必要性,并给出了具体的校正方法。通过对一个四层介质模型的广角反射道集进行时差校正和相位校正,分析了均方根速度等因素对校正效果的影响,并对校正后的道集做了叠加。经理论研究和模型试验分析,得出了广角地震数据校正的特点和值得注意的问题,为广角地震勘探数据处理奠定了理论基础。
Starting from Zoeppritz equation, the paper discussed the feature of amplitude and phase of wide-angle reflection data and affected reasons, showed the main differentiation of wide-angle reflection from narrow-angle reflection on seismic gathers by selection of single interface and thin reservoir model, and further expounded that it is necessary to carry out the moveout and phase corrections in wide-angle seismic data and gave concrete correction method. The influence of factors such as mean-square-root velocity etc. on correction effects was also analyzed by implementing moveout and phase corrections on wide-angle reflection gathers of 4-layer medium model and stack of corrected gathers was carried out. The characters of wide-angle seismic data correction and the issues being well worth notice were obtained by theoretical study and model-experimental analysis, laid a theoretical foundation for wide-angle seismic data processing.
Starting from Zoeppritz equation, the paper discussed the feature of amplitude and phase of wide-angle reflection data and affected reasons, showed the main differentiation of wide-angle reflection from narrow-angle reflection on seismic gathers by selection of single interface and thin reservoir model, and further expounded that it is necessary to carry out the moveout and phase corrections in wide-angle seismic data and gave concrete correction method. The influence of factors such as mean-square-root velocity etc. on correction effects was also analyzed by implementing moveout and phase corrections on wide-angle reflection gathers of 4-layer medium model and stack of corrected gathers was carried out. The characters of wide-angle seismic data correction and the issues being well worth notice were obtained by theoretical study and model-experimental analysis, laid a theoretical foundation for wide-angle seismic data processing.
引文
[1]胡中平,管路平,顾连兴等.高速屏蔽层下广角地震波场分析及成像方法.地球物理学报,2004,47(1):88~94
[2]曹文俊,李振春,王小六.广角地震处理方法研究进展.地球物理学进展,2004,19(2):296~299
[3]Richard J Castle.Atheory of normal moveout.Geo-physics,1996,59(6):983~999
[4]薛冈,王良书,胡中平.大炮检距地震资料动校正方法比较.石油地球物理勘探,2003,38(2):151~155
[5]宋宗平,李建军,章黎萍.叠前常相位校正.大庆石油地质与开发,2004,23(2):69~70
[6]李合群,周兴元.时差、常相位校正及加权叠加.石油地球物理勘探,2000,35(4):415~418
[7]Mazzotti A.Amplitude,phase and frequency versus offset application.Geophysical Prospecting,1991,39(7):863~886
[8]Liu Yinbin and Douglas R Schmitt.Amplitude and AVOresponses of a single thin bed.Geophysics,2003,68(4):1161~1168
[2]曹文俊,李振春,王小六.广角地震处理方法研究进展.地球物理学进展,2004,19(2):296~299
[3]Richard J Castle.Atheory of normal moveout.Geo-physics,1996,59(6):983~999
[4]薛冈,王良书,胡中平.大炮检距地震资料动校正方法比较.石油地球物理勘探,2003,38(2):151~155
[5]宋宗平,李建军,章黎萍.叠前常相位校正.大庆石油地质与开发,2004,23(2):69~70
[6]李合群,周兴元.时差、常相位校正及加权叠加.石油地球物理勘探,2000,35(4):415~418
[7]Mazzotti A.Amplitude,phase and frequency versus offset application.Geophysical Prospecting,1991,39(7):863~886
[8]Liu Yinbin and Douglas R Schmitt.Amplitude and AVOresponses of a single thin bed.Geophysics,2003,68(4):1161~1168
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心