Abstract: Che-Guai area in Junggar basin is long-temm in favorable directional zone of hydrocarbon migration in three major source sags.The well developed faults and traps in this area are characterized by multi- source and multi-stage hydrocarbon accumulations. The oil source study shows that there exists obvious regularity for source rock distribution. This paper presents the characteristics of petroleum migration and accumulation in different stages in each zone of Che-Guai area as follows: Hong-Che faulting is originally activated in late Hereynian movement and ceased till middle and late Y anshan movement, which plays destructive roles in early petroleum accumulation (before Early-Middle Jurassic) and sealing roles in late petroleum accumulation (at end of Early Cretaceous). It is concluded that bright prospects appear to be in the south section of Hong-Che fault belt and its slope of the lower wall as well as Shamenzi nose structure of Jurassic system, except for high risks for exploration of Cretaceous and Carboniferous in Chepaizi uplift area.

Key words: Junggar basin, source rock, peak hydrocarbon- generating stage, hydrocarbon migration, hydrocarbon accumulation