Abstract: This paper summarizes the studied results of unconformity in Luliang uplift, Junggar basin, and outlines the conception of unconformity and its effect on oil control, integrated with related information at home and abroad, particularly, including analyses in detail of the significance of unconformity in hydrocarbon accumulation and its types of related combinations. By starting with unconformity research, in-depth analyses of such transport systems as sands-unconformity system, fault-unconformity system, sands-fault-unconformity system and the relationship of local and regional unconformities are made. It is pointed out that the longterm developing uplifts in northwestern margin, south part of northern margin and east part of Junggar basin are the most favorable areas for exploration of oil-gas reservoirs related to the unconformities. In addition, some effective approaches for dealing with these problems are sum up, and related key points are provided in this paper.

Key words: Junggar basin, unconformity, trap, hydrocarbon prospecting