Based on an integrated ananlysis of geologic background and geochemical data, it is considered that petroleum in Dongxin area mainly come from Lijin, Niuzhuang and Minfeng sub-sag.

• 结合地质背景和地球化学资料分析，认为该区油气主要来自利津、牛庄和民丰3个洼陷，其中“沙三型”原油主要分布于靠近利津洼陷一侧；