二连盆地群由５１个相互独立、具有相似构造演化史的小断陷湖盆（凹陷）组成。根据这些凹陷的沉积发育特征及凹陷的内部结构特点，将它们划分为４种结构类型：单断断槽式，单断断超式，双断地堑式，双断地垒式。凹陷结构与油气分布之间有比较密切的关系。根据这种关系，建立了４种类型凹陷结构的成藏模式：单断断槽式以断槽为中心，油气近似环状分布；单断断超式油气主要向缓坡运移，形成比较单一的斜坡复式油气聚集带；双断地堑式主要在滑塌背斜近生油洼槽的一侧聚集，在最靠近主生油洼槽的断隆带形成复式油气聚集带；双断地垒式凹陷中，发育由大型构造地层及小断块圈闭油气藏组成的中央地垒复式油气聚集带。图５参２（王孝陵摘） The Erlian Basin is composed of 51 small rift lake basins (dimples) that are independent of each other and have similar tectonic evolution history. According to the sedimentary development characteristics of these depressions and the characteristics of the internal structure of the depressions, they are divided into four types of structures: single rupture, single rupture superposition, double rupture and double rupture. There is a close relationship between depression structure and oil and gas distribution. According to this relationship, four types of reservoir formation models for depression structure have been established: the single fault zone is centered on the fault depression, and the oil and gas are distributed in an approximately annular distribution; the single fault superposition oil and gas are mainly migrated to the gentle slope to form a single slope complex Oil and gas accumulation zone. The double-severed graben mainly accumulates on the side of the slipstream anticavoid near the subsurface oil depressions and forms a complex hydrocarbon accumulation belt in the uplift belt closest to the main oil-producing depression. , Developed by the large structure  stratigraphic and small fault trap oil and gas reservoirs composed of the central base compound double oil and gas accumulation zone. Figure 5 reference 2 (Wang Xiaoling pick)