Abstract：Vibroseis slip sweep is one of the high productivity acquisition methods suitable for density seismic exploration. However harmonic interferences caused by slip sweep impact on seismic data quality. The commonly used method for harmonics suppression from slip sweep data, “model method”, adopt a filter derived from the vibrator ground force to estimate harmonics on correlated data, and then subtract them from the correlated data. However, in field operation the vibrator ground force is often missing due to some reason, so the “model method” cannot be used to suppress harmonics in this case. As we know that adjacent VP interference suppression is always used on independent simultaneous sweep (ISS) data. We may consider harmonics on slip sweep data as a kind of “adjacent VP interference”. For vibroseis slip sweep 3D seismic data in the Northwestern Junggar Basin, we use the model method when the vibrator ground force is available, and adopt adjacent VP interference suppression when the vibrator ground force is missing. Application results show that our approach can effectively suppress harmonics from the 3D slip sweep data.
