Abstract: Junggar basin is characterized by early discovery, multiple types, large scale, wide distribution and big differences of oil-gas reservoirs, accounting for 76.1% of proved 00IP. It has been playing a major target for petroleum exploration and development in Xinjiang region. For discovered non-structural reservoirs, their onigin types mainly inelude: the fractured-lithologic and lithologic stratigraphic reservoirs dominated by torrential fanglomerale and glutenite of steep slope in depositional fault bench in northwestem margin of Junggar basin, the structural-lithologic and lithologic-stratigraphic reservoirs by delta submarine fan, turbidite fan glutenite and sandstone in nearshore fault slope in Zhundong (east Junggar) area, the structural-lithologic and lithologic stratigraphic reservoirs by fluvial-delta sand-stone in Jurassic-Cretaceous gentle slope controlled by paleo-swell in hinterdand of Junggar basin, and the buried-hill-weathered-crust reservoirs of Hercynian episode in basement of Junggar basin. The basin-scale regional cap rocks of Baijiantan formation (Huangshanjie formation) of Upper Triassic are their boundaries, and upper and lower reservoir assemblages can be divided. The lower assemblage con-tains hydrocarbon from self source and adjacent source, and its main factors of fomming non-structural reservoir are lithofacies, petrophysi-cal property and transport system. The upper assemblage has hydrocarbon sources mainly from Permian remote source and Permian-Jurassic mixed source, its primary control factors of shaping non-structural reservoir are transport 8ystem, tectonic setting, lithofacies, trap and petrophysical property.

Key words: Junggar basin, non-structure, reservoir, origin type, master control factor