Abstract：Shooting by vibroseis has important position in seismic exploration. The pattern of shooting by vibroseis has developed from former shooting in single shot-point to current shooting by multi-source. In order to improve the efficiency of multi-source shooting, it should use slide sweeping. The basic idea of slide sweeping is to use multi-group of vibroseis for slide sweeping without waiting, i. e. the other source has begun starting sweeping for shooting when the former source doesn't finish the process of sweeping for shooting, which inevitably produced harmonic interference. On the basis of briefly introduced slide sweeping technique,the paper analyzed the distributing feature of harmonic distortion,discussed the method greatly improving the efficiency of seismic operation by reasonable setting sliding time and reducing the influence of harmonic distortion on seismic data quality and illustrated the results by real cases.
