摘要
尼日尔Agadem区块古近系Sokor1组普遍存在低阻油层,导致油层在测井解释过程中容易被遗漏.根据普通薄片、铸体薄片、扫描电镜、黏土X线衍射、重矿物分析、地层水矿化度和试油分析等资料,考虑岩石粒度、孔隙结构、黏土矿物含量及类型、油层厚度、导电矿物及油藏类型,讨论造成低阻油层的地质成因.结果表明,Sokor1组低阻油层形成原因主要包括3个方面:岩性细、孔隙结构差和黏土含量高造成束缚水饱和度高;黏土矿物附加导电性;油层厚度薄.该研究成果为尼日尔Agadem区块油气勘探提供地质借鉴.
Low-resistivity oil layer is widely distributed in Sokor1formation in Agadem block of Niger,and they are very difficult to be interpreted in the logging interpretation.Based on data of thin-sections,casting thin-sections,scanning electron microscope,X-ray diffraction of clay minerals,heavy mineral analysis,salinity of formation water and oil test,forming mechanisms of low-resistivity oil layer of Sokor1formation have been analyzed.In the paper we take grain size of reservoir,pore structure,con-tent and type of clay minerals,reservoir thickness,conductive minerals and reservoir type into consideration when studying the forming mechanisms of low-resistivity oil layer.It is believed that there are 3reasons for the formation of the low-resistivity oil layer,including high irreducible water saturation which was formed by fine grain size,high contents of clays and complicated porous texture;added conductivity of clay minerals and thin reservoir thickness.The research provides geological reference for the further oil and gas exploration in Agadem block of Niger.
出处
《东北石油大学学报》
CAS
北大核心
2014年第2期27-34,6-7,共8页
Journal of Northeast Petroleum University
基金
国家油气重大专项(2011ZX05006-006-02)
作者简介
单祥（1988-），男，硕士，助理工程师，主要从事油气储层地质方面的研究．
