Abstract: F-K filtering is the most effective method of linear noise suppression. The linear noise in shot gather appears to be non-linear because of the non-uniformity of offsets between traces in 3D seismic data processing. So using the F-K method can not eliminate the linear noise efficiently. The seismic data processing of Wellblock Nanka-1 is made, by application of pseudo-azimuth correction, the signal to noise ratio is increased. The quality of seismic data is then improved, combined with other processing measures. Finally, Nanka-1 structure is recognized by elaborate interpretation and plotting of the seismic data.

Key words: F-K filtering, linear noise, pseudo-azimuth correction, signal to noise ratio