Abstract: The carbonate reservoir of Ordovician in No.1 Block of Tahe oilfield is of big buried depth and serious heterogeneity, which bring about great difficulty to reservoir prediction and exploration arrangement. Based on correct understanding of basic feature of the reservoir, the variations of amplitude, frequency and waveform of seismic wave are used to recognize the reservoir; many techniques such as coherent events calculation, seismic well log inversion, velocity analysis and main curvature analysis are applied for study of fractural and vuggy development in the reservoir; and 3-D visualized technique is utilized to research karst development. Practice shows that such a method like these is feasi-ble and can be used for prediction of the favorable exploratory areas in developed carbonate reservoirs to some extent.

Key words: Tarim basin, Tahe oilfield, carbonate rock, reservoir, prediction