摘要
从储层岩性、成岩作用、隔夹层研究等方面入手,利用渗透率变异系数、突进系数、级差、隔夹层参数以及孔隙度、渗透率的变化对桩74块低渗油藏进行了储层非均质性研究。Es_3下Ⅱ油组储层为中孔、特低渗的湖底扇碎屑岩,渗透率与主流孔喉半径具有良好的相关性,成岩作用的差异是造成储层非均质性差异的一个因素。自下而上层内非均质性逐渐加强。夹层不甚发育,对储层非均质性影响不大。层间非均质较强,隔层发育,对储层非均质性影响较大。
Based on lithology,diagenesis and interbed research, heterogeneity of low-permeability res- ervoir in Zhuang 74 Block was studied using parameters including permeability variation coefficient, permeability differential indexes, interbed index, variation of porosity and permeability, etc. Es3 lower Ⅱ oil formation is uhra-lowpermeable and medium porosity clastic rocks of sublacustrine fan, whose permeability is related well with radius of the mainstream throat. Diagenesis is the major factor affect- ing on reservoir heterogeneity. Inner-layer heterogeneity becomes gradually more obvious upwards. Interbed is less developed, with little effect on reservoir heterogeneity. Interlayer heterogeneity is strong with great effects on reservoir heterogeneity.
出处
《海洋地质动态》
北大核心
2010年第8期23-27,46,共6页
Marine Geology Letters
基金
国家重点基础研究发展规划973项目(2003CB214608)
关键词
非均质性
低渗透
定量
隔夹层
成岩作用
heterogeneity
low permeability
quantitation
interbed
diagenesis
