摘要
辽东湾坳陷新近系河流相块状特-超稠油油藏模式极其特殊,具有弧形的外含油边界和波状起伏的油水界面,油水关系复杂,出现了大型的油水倒置现象.通过对储层物性和含油性、岩石薄片、流体包裹体荧光观察和饱和烃芳烃色-质谱等资料的研究表明:这种特殊的油藏模式受储层渗透率分布的影响,研究区在垂向上自下而上河道滞留、心滩和河漫滩三种沉积微相以河道形式依次叠置,呈现出旋回性特征;在河漫滩和心滩顶部,以及多期河道滞留沉积微相叠加形成的厚层粗碎屑段,由于较高泥质含量及粗粒碎屑沉积的影响,发育渗透率相对较差的层段,形成不同规模的'物性分隔层',成为储层含油性和原油地球化学特征规律性变化的边界.
The Neogene fluvial massive extra-super heavy oil reservoir in Liaodong Bay depression is extremely special,characterized by the arc oil boundary,undulation of the oil-water interface,complex oil-water relation,and large scale oil-water relation inversion.In this paper,reservoir physical properties and oil saturation,thin section,fluid inclusions fluorescence observation,saturated hydrocarbon and aromatic hydrocarbon gas chromatography mass spectrometry have been studied.Results show that this special reservoir model is controlled by the distribution characteristics of reservoir permeability.In the vertical direction,there are three sedimentary micro-facies in the study area:channel lag deposit,central bar and flood plain,which overlap each other in the form of multi-channel rivers,showing the characteristics of cyclicity.On the top of flood plain and central bar,and the thick layer coarse clastic segment formed by multi-stage channel lag deposit,relatively poor permeability is formed because of the high content of mud and coarser clastic deposits,resulting in'physical separation layers'of different scales,which become the boundary of both oil saturation property and geochemical characteristics regular change of crude oil.
作者
王冰洁
徐长贵
吴奎
张如才
刘丰
Wang Bingjie;Xu Changgui;Wu Kui;Zhang Rucai;Liu Feng(Tianjin Branch of CNOOC,Tianjin 300452,China)
出处
《地球科学》
EI
CAS
CSCD
北大核心
2019年第9期3088-3100,共13页
Earth Science
基金
国家科技重大专项(No.2016ZX05024-002-006)
关键词
特-超稠油
油藏模式
储层物性
河流相储层
新近系
辽东湾坳陷
石油地质
extra-super heavy oil
oil reservoir model
reservoir physical property
fluvial reservoir
Neogene
Liaodong Bay depression
petroleum geology
