陆相断陷盆地隐蔽油气藏成因类型及控制因素——以南堡凹陷为例  

Genetic Types of Subtle Hydrocarbon Reservoirs and Their Controlling Factors in Terrestrial Fault Basin

作　　者：罗群[1] 周海民[2] 董月霞[2] 曹中宏[2] 

机构地区：[1]中国石油大学(北京)盆地与油藏研究中心,北京102249 [2]中国石油冀东油田分公司,河北省唐山市063000

出　　处：《中国石油勘探》2007年第2期7-14,共8页China Petroleum Exploration

基　　金：国家(973)重大基础研究项目"中国典型叠合盆地油气聚散机理与定量研究"(61999043310);中国博士后科学基金项目(PX060696)

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。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.

关 键 词：隐蔽油气藏 成因类型 坡折带 南堡凹陷 

分 类 号：TE112.3[石油与天然气工程—油气勘探]