Abstract: According to the characteristics of reservoir and caprock and their relations, evaluation of continuous and discontinuous reservoir-caprock assemblage in Tabei area and suggestion of the most favourable assemblages in study area to be the combination of Jidike formation as caprock and Suweiy iformation and Upper Cretaceous-Paleogene as reservoi r, as well as the combination of mid-upper member in Kapushaliang group as caprock and lower member as reservoir were made.Moreover, this paper discussed the relations between reservoi r-caprock assemblage and hydrocarbon migration and accumulation, and pointed out that Hercynian and Himalayan movement are two reservoir-forming periods.

Key words: Tarim basin, Tabei uplift, Reservoir, Caprock, Assemblage, Hydrocarbon migration, Hydrocarbon accumulation