Abstract：The seismic data with low-amplitude buried-hill in Liaohe depression are characterized by low S/N ratio,complex diffractions of faults,unidentified feature of buried-hill configuration and interior reflections.For that reason.it has to improve the S/N ratio of seismic data and imaging precision.We used such data processing techniques as sub-azimuth velocity analysis and stack,surface consis-tence,3-D map filtering noise-elimination, anisotropic DMO.sweeping of migrated velocity fields and interval velocity smoothing and prestack time migration and detailed introduced the principles and application effects of each technique.We considered after study that the former three tech mques could effectively suppress the interference,improve the precision of residual statics and improve the S/N ratio of data in low-amplitude huriefl-hill m a precondition of preserving the feature of useful seismic signals;the later three techniques can strongly guarantee the precision of images in complex structures of low-amplitude buried-hill.A set of data processing techniques series aimed at the feature of seismic data in Liaohe low-amplitude buried hill areas are preliminarily formed,which gives a reference and practical value to seismic data processing in low-amplitude buried-hill areas.
