Abstract: Thrust-fault system and palaeohighs are developed in deep structures in hinterland of Junggar basin. In the north the burial depth of them is shallower and characterized by concave-convex structural framework; in the south that is deeper and features relatively independent palaeohighs. The oil sources of the deep strata (C-P) are adequate, and the petrophysical properties of reservoirs can be conserved effectively. In the Lower Carboniferous occur dark argillaceous source rocks of transitional facies, which are favorable for selfgeneration and self-preservation due to rich resources; while the special volcanic reservoirs of Carboniferous are not restricted by burial depth, thus relatively premium reservoirs are developed in deep strata which undergo such four-stage reservoir formations, destructions and adjustments as Late Hercynian, Late Indosinian, Middle Yanshan and Late Yanshan orogenic movements. The deeper the deep target strata, the more adjacent they from the source rocks, and the easier the self-generation and self-preservation becomes, even they could form deep-basin natural gas reservoir combination patterns with high temperature and high pressure around inherited palaeohighs. It is concluded that the volcanic rocks of Carboniferous will be a most realistic domain for petroleum exploration for their big thickness, wide distribution and a series of giant forward structures. The Moshen-1 Well in Mosuowan swell drilled 7 500 m in depth and penetrated 700 m of Carboniferous indicates that in hinterland of Junggar basin, deep volcanic reservoirs of Carboniferous are developed, revealing bright prospects for exploration.

Key words: Junggar basin, hinterland, deep strata, structural feature, petroleum resource