Abstract: A fine seismic imaging technology tailored to fit the characteristics of the fractured-vuggy carbonate reservoirs in the Tahe oilfield is developed.It consists of a series of techniques,including noise elimination,sur-face consistency processing,wavelet consistency processing,velocity analysis,3D DMO stacking,cascade migra-tion to image,and etc.It has been proven that a delicate combination of these techniques can yield fine images of the top erosional surface and inner karst of the Ordovician,thus improving oil well yield and providing technical support for a steady and fast development of the Tahe oilfield.

Key words: erosional surface, beaded anomaly, 3D DMO, velocity analysis, cascade migration, carbonate rock, Tahe oilfield