Abstract: The Ordovician buried hill in Sangtamu area of Tarim basin is a fractured and vuggy reservoir. In the year 2000-2001, the seismic data processing integrated with interpretation were made, intensify ing the surface consistence, prestack noise elimination and Hi-Fi processing. By using modern karst theory, seismic attribute cluster analysis and seismic facies technique to study the structural feature and the karst special distribution in this Ordovician buried hill, the favorable reservoirs, the top configuration are well delineated, with objective prediction of devel-opment of the reservoirs and calculation of proved oil-gas reserves. Nowadays, the annual productivity of 200,000 tons has been constructed in this area.

Key words: Tarim basin, buried hill, 3D seismic prospecting, seismic facies, karstification