济阳成熟探区非构造油气藏深化勘探

Exploration potential of nonstructural pools in th matured acreage of Jiyang District

济阳探区是一个经过 40多年勘探的油气资源较为丰富的老区 ,近年来地质风险和工程风险较高的隐蔽油气藏成为主要储量目标。通过深化盆地构造、沉积和成藏条件认识 ,揭示了上第三系、下第三系和古潜山成藏模式。上第三系河道砂岩油藏主要受“网 毯”式疏导体系的控制。下第三系低位扇和浊积砂体油气藏集中分布在断裂坡折带 ,断裂坡折带类型不同低位扇油藏组合不同。盆地发育的阶段性和构造动力学条件决定了古潜山多样性 ,多样性古潜山油藏按压性带、张性带和溶蚀带有规律地成带出现。上述三类、三个世代的隐蔽油气藏通常在空间上复合成带 ,横向上叠合连片 。

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.