Abstract: According to the comparison of amplitude attenuation curves between abnormal energy seismic tract and normal seismic tract without amplitude compensation, it is suggested that the amplitude attenuation of normal seismic trace after eliminating the influence of surface wave is much greater than the abnormal energy seismic trace. The latter can be recognized by means of average absolute value amplitude ratio within the same window length at the beginning and the end of seismic traces as the scale for the amplitude attenuation. When the abnormal energy concentrates at or near a frequency, it can be recognized and eliminated by the scale in frequency division data. The recent-year seismic data processing indicates that the automatic recognition and suppression of abnormal energy seismic trace by method for amplitude attenuation and frequency division is feasible and significant, especially for the processing of 3D seismic data acquired at low signal-to-noise ratio area.

Key words: abnormal energy, amplitude attenuation, recognition, signal-to-noise ratio