【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。更多还原

【Abstract】 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.更多还原