Abstract: According to analysis of geochemical features of nitrogen compounds in crude oil, petroleum migration direction in the southwest edge of Jianghan Basin is from the main petroleum-generating depression(the Meihuaiqiao Depression) in the north to the Fuxinchang,Caixue Belt in the south.With techniques such as fluid inclusion,laser Raman spectrum and micro-fluorescence analysis,it is studied the episodes of oil pools formation.There are two episodes for petroleum to entrap: the first one is the early period of Jingsha Formation of Lower Tertiary,the second one is the medium-late period of Qianjiang Formation of Lower Tertiary. Three patterns to form oil-pools are put forward: the Inner Source-Nose-Like Fault-Facies-Controlled(self-generated and self-stored),the Inner Source-Nose-Like Fault-Fault-Controlled(generated in the lower section and stored in the upper section) and the Marginal Source-Faulted Block-Fracture and Facies-Controlled.