Abstract: The Katake uplift in Tarim basin has undergone multistage tectonic movements. Three basal unconformities of the Middle Ordovician ($T^{4}_{7}$), the Silurian ($T^{0}_{7}$) and the Upper Devonian ($T^{0}_{6}$) occur in the Paleozoic. The oil-gas distributions in them are controlled by changes of combination configuration, distribution characteristics and denudation tendency. Large scale and long distance hydrocarbon migration appears from low part to high part along these unconformities or along faults when meeting them. The intensity of hydrocarbon accumulation increases with the overriding degree of the unconformities.

Key words: Tarim basin, Katake uplift, Paleozoic, unconformity, hydrocarbon accumulation, evolution