Abstract: Tahe oilfield in Tarim basin is characterized by multi-stage hydrocarbon generation, multi-channelmigration and multi-stage petroleum accumulation.This paper discusses the hydrocarbon conduit systems such as fault and structural fissure,unconformity and paleo-weathering crust, Ordovician vug and fracture as well as interconnected sand body in light of Tahe oilfieldand its regional geological situations.The study shows that it is these systems that control the hydrocarbon migration andaccumulation in different periods and reservoirs,the formation and evolution of different areas and types of pools. The systemscan be classified with network-like model and zigzag-like model for petroleum migration and accumulation.

Key words: Tarim basin, Tahe oilfield, migration, accumulation, model