油气地质与采收率2013，Vol.20Issue(1)：32-35,4.
基于恒速压汞的特低—超低渗透储层孔隙结构特征——以鄂尔多斯盆地富县探区长3油层组为例
Study on pore structure characteristics of super-low permeability and ultra-low permeability reservoirs by means of constant-speed mercury intrusion technique-case of oil layers of Chang 3 of the Yanchang Formation in Fuxian exploration area of the Ordos
摘要
Abstract
The microscopic pore structure of Chang 3 ultra-low permeability reservoir of the Yanchang Formation in the Ordos Basin Fuxian exploration area is thoroughly analyzed and investigated by using constant-speed mercury intrusion technique, combined with conventional casting thin sections, scanning electron microscopy, constant-pressure mercury injection and other analytical approaches for the first time. The main pore type of the reservoir is residual intergranular pore and dissolved intergranular pore. The pore structure is divided into five categories: lower displacement pressure-coarser throat type, low displacement pressure-coarse throat type, middle displacement pressure-middle throat type, high displacement pressure-fine throat type, higher displacement pressure-finer throat type. The result of the constant-speed mercury intrusion test shows that the distribution of the pore radius ranges from 100 to 200 μm, the pore is mainly the medium-small, few samples exhibit the large scale, and pore distribution curves are partial coarse, the distribu-tion of throat radius ranges from 0.2 to 0.7 μm, the throat is mainly micro-throat, throat distribution curves are partial thin, reservoir flow capacity has poor correlation with the pore size, and it is mainly controlled by the size of the average radius of throat, distribution patterns of throat-size, and thus affecting the development effectiveness of super-low permeability and ultra-low permeability reser-voirs.关键词
恒速压汞/特低—超低渗透储层/孔隙结构/长3油层组/富县探区/鄂尔多斯盆地Key words
constant-speed mercury intrusion technology/super-low permeability and ultra-low permeability reservoirs/pore struc-ture/oil layers of Chang 3/Fuxian exploration area/Ordos Basin分类
能源科技引用本文复制引用
蔡玥,赵乐,肖淑萍,张磊,龚嘉顺,孙磊,孙阳,康丽芳..基于恒速压汞的特低—超低渗透储层孔隙结构特征——以鄂尔多斯盆地富县探区长3油层组为例[J].油气地质与采收率,2013,20(1):32-35,4.基金项目
国家重点基础研究发展计划"973"项目"多种能源矿产共存成藏(矿)机理与富集分布规律(2003CB214601). （矿）
