Pore Types and Characteristics of Shale Gas Reservoir: A Case Study of Lower Paleozoic Shale in Southeast Chongqing
详细信息
- 责任者：Han Shuangbiao (School of Energy Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Jinchuan
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(3)
- 关键词：页岩气 ; shale gas ; 孔隙结构 ; pore structure ; 重庆 ; Chongqing
- 页码：p.247-253
- 图表：illus., 22 refs.
- 分类号：1003
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
Through thin section analysis,scanning electron microscopy and argon-ion milled surfaces technique,the pore types and characteristics of Lower Paleozoic gas shales in Southeast Chongqing were observed and described.Based on the experimental methods of total organic carbon content,XRD analysis,rock porosity,nitrogen adsorption and methane isothermal adsorption,the pores’ contribution to gas storage was analyzed and their impacts on hydrocarbon migration was discussed.The results showed that the organic pore,intraparticle pore,interparticle pore and microfracture are four pore types developed in Lower Paleozoic shale gas reservoir.Most dispersed pores on the organic matter are nanoscale pores,intraparticle or interparticle pores with granular quartz appeared;pore space spreads between small crystals inside pyrite;flake structures produce pores by flocculation of clay;microfractures occur within the matrix of shale,some are millimeter sized.Different types of pores could provide various sized storage space and there is an obvious linear correlation between gas adsorption capacity and pore characteristic parameters(TOC,BET surface area,BJH total pore volume).Microfractures and interparticle pores are most likely to contribute to hydrocarbon migration.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |