关键词: 济阳探区, 隐蔽油气藏, “网毯”式疏导体系, 断裂坡折带, 古潜山油藏

Abstract: Jiyang Depression is of abundant oil-gas resources and has been explored for more than 40 years.In recent years,the nonstructural subtle reservoirs with high geological and engineering risks have become the major targets of exploration.The basin structure,sedimentary and reservoir development conditions were investigated.The Neogene,Eogene and Paleozoic models for developing reservoirs were refined. The Neogene fluviatile sandstone pools were controlled by the "net-rug"drainage system.The Eogene lowerstand fan and turbidite reservoir were distributed along the fault slope break belts concentratively,and the types of the fault slope break belts dominated the reservoir assemblage.The characteristics of the development phases and the structural dynamic condition controlled the variety of the buried hills,i.e.various buried hills existed regularly in terms of compressive,tensional and eroded belts.All the three kinds of subtle reservoirs generated on the above three models usually appeared in congruence belts vertically and laterally.So the exploration for the subtle reservoir in the terrestrial fault basin has a great potential.

Key words: Jiyang District, subtle reservoir, “net-rug”drainage system, fault slope break belt, buried hill reservoir