岩矿测试2018，Vol.37Issue(3)：235-243,9.DOI:10.15898/j.cnki.11-2131/td.201612210188
基于聚焦离子束-扫描电镜方法研究页岩有机孔三维结构
Three-dimension Characterization of Organic Matter Pore Structures of Shale Using Focused Ion Beam-Scanning Electron Microscope
摘要
Abstract
The size of organic matter (OM) pore in shale directly affects shale gas content,and its connectivity is of great significance for gas migration and exploitation.Three-dimension reconstructions down to nanometer scale (about 10 nm)are performed on OMpores in samples from the Lower Silurian Longmaxi Formation in Qiliao area using Focused Ion Beam-Scanning Electron Microscope (FIB-SEM).The results indicate that FIB-SEM technique is an effective method for three-dimension characterization of nano-scale (＞3 nm)pore structures of micro-scale shale samples.Honeycomb OMpores distribute uniformly with poor connectivity,and their diameters are dominated by 10-200 nm.Micro-crack like OM pores at the interface exhibit good connectivity on the local area,with diameters concentrated at 200-300 nm.Bulk porosity of shale is positively correlated to OM content. For shale with OM pores as host,the concentrated distribution of the organic matter and the good continuity will result in a small size of unit cell for characterization of porosity.关键词
聚焦离子束-扫描电镜/三维空间结构/有机孔/纳米孔隙结构/龙马溪组页岩Key words
Focused Ion Beam-Scanning Electron Microscope/3D structure/organic matter pores/nano-scale pore structure/Longmaxi Formation shale分类
天文与地球科学引用本文复制引用
王羽,汪丽华,王建强,姜政,金婵,王彦飞..基于聚焦离子束-扫描电镜方法研究页岩有机孔三维结构[J].岩矿测试,2018,37(3):235-243,9.基金项目
中国科学院战略性先导科技专项(B类)"页岩三维成像实验技术和数据获取技术"(XDB10020102) （B类）
上海市科学技术委员会基础研究重点项目"页岩微观结构的同步辐射研究"(12JC1410400) （12JC1410400）
国家杰出青年科学基金资助项目(41325016) （41325016）
