油泉子油田低渗透储层特征分析及岩性识别

油泉子油田油砂山组地层岩性复杂,呈薄层状分布,属中孔隙度低渗透率储层.在岩心观察、薄片鉴定的基础上,分析了各种岩性的沉积和储层特征,油泉子油田主要有藻灰岩、泥晶灰岩、灰质粉砂岩、泥灰岩和泥岩等5类岩性.储集空间类型主要包括粒问孔、溶孔、微孔隙和微裂缝.储层孔隙结构复杂,表现为亲水性,整体属于中孔隙度特低渗透率储层.应用FMI成像测井和主成分分析方法,分别提取对泥质含量反映敏感的第1主成分和对碳酸盐含量反映敏感的第2主成分进行交会,可有效识别砂、泥、碳酸盐岩混杂的储集层岩性,为研究区储层评价奠定了基础.

Feature Analysis and Lithology Identification of Low Permeability Reservoir in Youquanzi Oilfield

Formation lithology in the Yousashan group is complex and the formation is finely-laminated in Youquanzi oilfield,which belongs to medium and low permeability reservoir.Based on core observation and thin section analysis,analyzed are sedimentary and reservoir features,results of which show that Youquanzi oilfield mostly includes five kinds of lithology,such as,algal clastic limestone,micritic limestone,calcareous sandstone,muddy limestone and mudstone.Reservoir space types mostly include interparticle pore,...