Abstract: In same faulted group, different faulted sags are of both relative independency and common geologic regularity that control the distinct properties and inter-relations for individual petroleum system. In view of features of geologic structure, strata and source-reservoir-caprock assemblage, this paper makes a classification and comparison of six petroleum systems in nature composed of Wuerxun and Beir sags, etc., based on basic principle of petroleum system and its faulted structural pattern, faulting developed feature, reservoir type and distribution. Furthermore, this paper presents five types of petroleum system models such as double-faulting reverse, fault-overlapping reverse, fault-overlapping tandem, simple double-faulting and inorganic CO₂ types, by which prediction of other sub-faulted types of petroleum systems in Hailar basin.

Key words: Hailar basin, faulted sag, petroleum system, modes, prediction