Application research of two-step surface wave suppression method based on matching pursuit
In land seismic exploration,surface waves are a commonly developed regular interference wave with low frequency and strong energy,which seriously affects the quality of data and must be suppressed.The conventional surface wave suppression methods have two shortcomings.On the one hand,the surface wave suppression is not thorough,resulting in residual surface waves.On the other hand,it often damages the low-frequency effective signal.This article proposes a two-step surface wave suppression method based on matching pursuit.By utilizing the differences in frequency,energy,and spatial position between surface waves and effective waves,the first step is to suppress surface waves by referencing the dominant frequency band of effective waves at near offset distances,and the second step is to suppress surface waves by referencing the low-frequency information of effective signals at medium and far offset distances.
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