石油实验地质2016，Vol.38Issue(4)：453-459,7.DOI:10.11781/sysydz201604453
川东南志留系龙马溪组页岩储层微孔隙结构及连通性研究
Micro-pore structure and connectivity of the Silurian Longmaxi shales, southeastern Sichuan area
摘要
Abstract
Micro⁃pore structure and connectivity of the Silurian Longmaxi shales in the southeastern Sichuan Basin were studied using CT, FIB-SEM, Ar+-SEM, and TEM techniques. Four modes for micro⁃pores in shales were de⁃termined to be as follows. (1) Intergranular micro⁃pores which exist between mineral grains and account for a small proportion of the total. (2) Intragranular micro⁃pores which mainly exist in intergranular dispersed organic matter or symbiosis organic matter with globular pyrite, and some between clay layers. (3) Grain boundary fractures which exist around organic or mineral grains, and work as a connective network for the shales. (4) Interlayer bedding which provides filtration channels. Intraparticle organic nano⁃pores are bubble like, show a normal size distribu⁃tion, and are connected to each other. Their diameter mainly ranges from 30-90 nm and throat width ranges from 7-20 nm. Interlayer bedding accounts for 1%-2% of total shale pores and fractures, and are favorable filtration channels. Micro⁃pores and fractures in organic matter provide the main reservoir space for shale gas, grain boundary fractures form a connective network, while interlayer bedding provides filtration channels.关键词
孔隙结构/储集空间/渗滤通道/页岩/龙马溪组/志留系/川东南Key words
pore structure/connectivity/reservoir space/filtration channel/shales in Longmaxi Formation/southeastern Sichuan Basin分类
能源科技引用本文复制引用
刘伟新,鲍芳,俞凌杰,张文涛,张庆珍,卢龙飞,范明..川东南志留系龙马溪组页岩储层微孔隙结构及连通性研究[J].石油实验地质,2016,38(4):453-459,7.基金项目
国家自然科学基金项目（41372130）和中国石化科技部项目（P13089）资助。 （）
