【摘要】 速度是地震资料处理解释中最重要参数之一。普遍采用的水平基准面下的速度提取方法，在地表条件较简单时精度较高；理论模型计算表明，地表条件复杂时误差较大，速度误差浅层比深层大，速度精度与水平基准面位置有关，基准面越接近地表，精度越高。更多还原

【Abstract】 Velocity is one of the most important parameters in seismic data processing and interpretation. The accuracy is much higher in the simple ground condition when adopting velocity pick-up method below the horizontal datum level. However the theoretical model calculation shows that when the ground conditions are rather complicated, the error is rather great and the ones in the shallower formations are much more serious than in the deeper. The velocity accuracy has something to do with the location of the horizontal datum level, More closer to the surface, more higher the accuracy is.更多还原