Abstract: In terms of diermal history of source nock, tectonic history, and diagenetic history of reservoir rock, this paper analysed and verified the formation and its model of Karatar formation reservoir of Eocene (Paleogene) and Miocene (Neogene) reservoir. Karatar formation condensate gas reservoir formed in a dual migration-accumulation mode with vertical migration from the lower fault to the upper fold and lateral migration along unconformity surface, while Miocene condensate gas reservoir with oil-ring formed in migration-accumulation mode, with fault and unconformity surface as the main passage.

Key words: Tarim basin, Kekeya, Anticline, Oil/gas reservoir formation, Mode, Fault, Unconformity surface