Static correction is a key problem in seismic exploration,which directly affects the resolution and accuracy of seismic surveys.When there are several different geophones pinned on same point at different time,the datum static correction,surface consistent and inconsistent residual static correction are all inapplicable.In order to solve this problem,a new static correction method based on common attitude gathers (CAG) is proposed.This method extracts seismic data received on different pinning time at same receiving location to construct different CAGs,and performs surface consistent static correction within a CAG.There may be several different values of the receiver statics at same receiving location when there are several CAGs.For source statics it still acquires to employ the conventional static correction method based on the surface consistency.The new method not only solves the surface inconsistent static problem between different CAGs at same receiving location,but also solves the surface-consistent static problem of all geophones and sources in the whole exploration area.The application of this approach to real data shows a good effect.%静校正问题是地震勘探的关键问题,直接影响地震勘探精度和准确性.实际地震采集过程中,当在相同接收点位置上不同时间内插拔布设了不同的检波器时,对于目前基于地表一致性理论假设的基准面静校正和剩余静校正,以及非地表一致性剩余静校正都不具备适用条件.为解决这一问题,本文提出了基于共姿态道集的静校正方法,将相同接收点位置上不同时间布设的检波点所接收的地震数据抽成不同的共姿态道集,在共姿态道集内实施地表一致性静校正;当某接收点位置上具有若干个共姿态道集时,该接收点位置上可能会存在多个检波点静校量;炮点静校问题仍然采用地表一致性静校正方法解决.该方法解决了同一接收点位置上不同共姿态道集之间的非地表一致性静校正问题,同时也解决了全区的检波点和炮点的地表一致性静校正问题,在实际数据应用效果明显.
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