时移动校正和叠加方法

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. 

AN APPROACH TO TIME-SHIFTED NORMAL MOVEOUT AND STACKING

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 τ₀ 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.