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中国东北区晚中生代含油气盆地形成有两期，各具不同的构造环境。第一期盆地（Ｊ_（１＋２））为断陷盆地；第二期盆地（Ｊ_３－Ｋ）为ＮＥ向分布的裂陷盆地群。晚白垩世在松辽盆地发育大型湖泊，形成规模巨大的陆相油气聚集。郊－庐断裂左行走滑作用及周边构造应力场变化导致盆地内平移断层和一系列的反转构造，为油气聚集提供了优越的圈闭条件。根据盆地构造发育史、充填特征及热演化史，将东北区中生代含油气系统划分为单源型和多源叠合型两大类，各自有自身的分布特征。
Late Mesozoic petroliferous basins in northeastern China have two phases, each with different tectonic setting. The first basin (J_ (1 + 2)) is a faulted basin. The second basin (J_3-K) is a rift basin with NE distribution. The Late Cretaceous developed large-scale lakes in the Songliao Basin, forming a large-scale continental oil and gas accumulation. The left-lateral strike-slip of the suburbs-Lu fault and the change of the tectonic stress field in the surrounding area lead to the translational faults and a series of inversion structures in the basin, which provide favorable conditions for the accumulation of hydrocarbons. According to the tectonic history, filling characteristics and thermal evolution history of the basin, the Mesozoic petroliferous systems in the northeastern area are divided into two major categories, one source type and multi-source conglomeration, each with its own distribution characteristics.