【摘要】 南堡凹陷隐蔽油气藏以上倾尖灭、透镜体、断层—岩性及不整合遮挡和超覆等类型为主,其分布受不同类型坡折带,如断裂坡折带、挠曲坡折带、沉积坡折带和侵蚀坡折带等控制。隐蔽油气藏成藏主控地质因素是断裂,其中同沉积基底大断裂控制了决定隐蔽圈闭形成和分布的各类坡折带的形成,而油源断裂则起到了将油气从烃源区输导到隐蔽圈闭中聚集成藏的关键作用。隐蔽油气藏成藏需要经过3个阶段:断裂控坡折带—坡折带控隐蔽圈闭—油源断裂输导成藏。更多还原

【Abstract】 Subtle hydrocarbon reservoirs in Nanpu Sag are mainly divided into updip pinch out reservoirs,lenticular reservoirs,fault-lithologic reservoirs,and unconformability of lap screened reservoirs.Their distribution is determined by the types of the slope break belts,such as fault,flexure,sedimentary,and erosional slope break belts.Geologically,the subtle oil-gas reservoirs are mainly controlled by faults,of which major syn-sedimentary basement faults dominate the formation of various slope break belts that determine the formation and distribution of subtle traps,while oil source faults play an important role in transporting oil and gas from hydrocarbon source rocks to subtle traps.Therefore,the reservoir-forming of subtle reservoirs can be divided into three stages:firstly,faults control slope break belts;secondly,the slope break belts control subtle traps;thirdly,oil source faults transport oil and gas to form reservoirs.更多还原