动校正前剩余静校正模块及其应用

为较好地消除表层低速带速度及厚度变化所引起的剩余静校正量,我们研制了在动校正前对资料进行剩余静校正处理的 PRSTC 模块。其方法的基本特点是可在速度不准及界面倾斜情况下,用无波形拉伸的原始波形求取剩余静校正值,为速度分析、动校叠加以及叠前处理直接提供较好的原始资料。因此,该模块和野外静校正一样,可做为地震资料处理的基本方法之一。经过实际资料的验证,表明该模块的处理效果及效率均能满足地震资料处理的要求,从而丰富和补充了地震资料处理的模块系统。

Residual static correction module before NMO correction and its application

In order to remove the residual time shifts resulting from the variations of weathering velocity and weathering thickness，we developed the PRSTC module for making residual static correction of seismic data before NMO correction, Thus, the residual static corrections can be calculated using original seismic waveform without stretch in the case of incorrect velocity and dipping reflectors so that good data can be provided for velocity analysis, NMO correction, stacking and prestaeking processing.Just like the field static correction, this module (PRSTC) is also essential to seismic data processing.The practical application shows that this module can fulfil the effect and speed requirements in seismic data processing, thus enriching seismic processing module family.