CAJ | 학술논문

通过分析苏北盆地东台坳陷高邮凹陷古近系原油的物性及其甾萜类化合物的分布特征,结合凹陷的构造与沉积特征对原油的类型进行划分,并系统分析不同类型原油的来源、分布特征以及相应的油气聚集成藏模式。总体上把该凹陷的原油划分为A和B两类,其中A型原油主要来自阜二段烃源岩,主要分布在深凹带及其斜坡部位;B型原油主要发现在深凹带内及其附近的戴南组和三垛组,以深凹带的成熟阜四段烃源岩为主,仅有少量来自深部位的阜二段烃源岩。斜坡部位的油气主要分布在阜一段—阜三段,来自阜二段烃源岩,属于近源运移特征。深凹带内深部位阜二段烃源岩,可以作为下一步勘探的重点。
통과분석소북분지동태요함고유요함고근계원유적물성급기치첩류화합물적분포특정,결합요함적구조여침적특정대원유적류형진행화분,병계통분석불동류형원유적래원、분포특정이급상응적유기취집성장모식。총체상파해요함적원유화분위A화B량류,기중A형원유주요래자부이단경원암,주요분포재심요대급기사파부위;B형원유주요발현재심요대내급기부근적대남조화삼타조,이심요대적성숙부사단경원암위주,부유소량래자심부위적부이단경원암。사파부위적유기주요분포재부일단—부삼단,래자부이단경원암,속우근원운이특정。심요대내심부위부이단경원암,가이작위하일보감탐적중점。
By analyzing the types of Paleogene crude oil and its origin of Gaoyou sag,Dongtai depression of Subei basin,combining with characteristics of structure,sediment and distribution of different type crude oils,the authors discussed the crude oil migration-accumulation model in the deep sag and slope zone.Crude oil is divided into two types of A B in which the type A oil came from the second member source rock and the type B occurred in the forth member of Funing formation.There are different crude oil migration-accumulation models in the deep sag and slope zone.In the deep sag and its adjacent zone,oil distributed mainly in Dainan formation and Sanduo formation and came from the forth member mature source rock of Funing formation in deep sag zone.In the slope zone,oil distributed mainly from the first to the third member of Funing formation and came chiefly from the second member mature source rock of the Funing formation in deep sag zone.In the meantime,it is the next step of important exploration field in deep zone of sag whose oil derives principally from the second member source rock.