Research On Random And Coherent Noise Attenuation

Random noise and coherent noise is two main noise of seismic data,In view of the random noise,This paper presents a new robust algorithm to predict coherence,use this property to suppress random noise,with confirmed structure seismic profile after filtering as a reference section,and to smooth the development of the third dimension,smooth forecast profile,perform traditional prediction correlation to calculate similar steps.So we implemented based on robust forecasting coherence of coherent noise suppression.Artificial model data and field data show that the presented filter and fault step in the detection of the process is feasible,and the new robust correlation can get more accurate fault prediction results.In view of the coherent noise,this paper puts forward combining Shearlet Transform and S Transform joint suppression of surface wave method,this paper make full use of the characteristics of low surface wave of low speed and direction,design a filter,which makes the suppression of surface wave is greatly increased,the effect of the proposed method was applied to collected the data of physical model,and the method and comparison f-k filtering method,maximum limit to suppress the surface wave energy,and keep the effective signal energy better.