时移动校正和叠加方法

AN APPROACH TO TIME-SHIFTED NORMAL MOVEOUT AND STACKING

在水平层状介质假设情况下 ,推导了反射波时距曲线的表达式 ,指出 :在对水平层状介质情况下 ,反射波时距曲线是一时移双曲线 .通过对理论模型和实际资料的处理 ,表明时移动校正和叠加方法具有高保真、高分辨率和明显的叠加成像效果 .同时 ,用时移动校正τ0 分析谱计算层速度较以往用Dix公式由叠加速度计算层速度精度要高 .这种方法不仅可以用于复杂构造的地震资料的叠加成像 ,也可以应用到高分辨率处理的流程中 .

The expression of the time_interval curve of the reflective waves is derived on the condition of the horizontal layered strata, indicating that the time_interval curve of the reflective waves is a time_shifted hyperbola in the layered strata. The processing of theoretical model and real data shows that the time_shifted normal moveout and stacking may produce a high_fidelity, high_resolution and accurate stacking image effect. At the same time, the interval velocity derived from the time_shift_corrected spectrum τ 0 is more accurate than that derived from the traditional Dix_equation_calculated stacking. This method is not only used for the stacking image of the seismic data in complex area, but also for the flow chart of the high_resolution processing.