吉林两井油田下白垩系泉头组四段低渗透储层孔隙成因与储渗单元特征

低渗透油藏是现代石油工业重点研究方向之一。吉林两井油田是中国具有代表性的低渗透油田。将研究区下白垩系泉头组四段储层砂岩划分成 5种岩石微相。分析了近源沉积物、成岩作用及粘土矿物演化对低渗透储层物性的影响 ,复杂的成岩作用是低渗透储层非均质性的主要成因。讨论了低渗透储层孔隙的成因、粘土矿物与微孔隙的关系。在此基础上归纳总结出了4种储层 ,最后根据储层特征与裂隙发育程度建立了 4种低渗透储层油气储渗单元类型

CHARACTER OF PORE ORIGINS AND RESERVOIR-PERMEATOR UNITS OF LOW PERMEABLE RESERVOIRS OF 4TH MEMBER OF THE QUANTOU GROUP OF LOWER CRETACEOUS IN LIANGJING OIL FIELD,JILIN

One of the principal studies of modern petroleum industry is the low permeable reservoir.Liangjing oil field is the typical low permeable oil field.Firstly,all of sandstones of 4th member of the Quantou Group are divided into five types of microlithofaces.These influence of physical property of low permeable reservoir by the sediment of short source,diagenesis and evolution of clay minerals are analysed.One of the main origins of heterogeneity of low permeable reservoir is the complex diagenesis.These pore origins,relations between clay minerals and micropores are discussed.On the basis of the research,four kinds of reservoirs are summarized.Lastly,four types of reservoir permeator units are established in the low permeable reservoirs according to characters of the reservoirs and developed degrees of the cracks.