多时窗旅行时分解剩余静校正方法

Residual static correction based on traveltime decomposition in multiple time windows

在复杂地表区的资料处理中,求取准确的速度非常困难,速度误差带来的剩余正常时差不容忽视。为此本文将剩余正常时差转换为速度误差的函数,采用多时窗分别对旅行时进行分解,可以获取不同时窗内的炮点静校正量、检波点静校正量和速度误差值。在获得速度误差后,分别用到相对应的时窗数据中,完成剩余动校正,再将剩余静校正量用于此数据,完成多时窗旅行时分解剩余静校正处理。实际资料处理结果表明,该法是解决复杂区地震资料剩余静校正问题的有效方法。

In complex areas data processing,residual normal moveout cannot be ignored as residual normal moveout and residual statics impact seismic data imaging.In this work we propose a residual static correction approach based on traveltime decomposition in multiple time windows.First,we convert the residual normal moveout to the velocity error function.Then by decomposing the traveltime in multiple time windows we get statics on shot points and receiver points,as well as velocity errors.We apply velocity errors for residual normal moveout in the corresponding windows.Finally we apply residual static correction on shot points and receiver points.Real data examples show that this method is effective on residual static correction in complex areas.