扫描电镜下龙马溪组页岩储集空间特征研究——以滇东北XY1井为例  

Study on the spatial characteristics of shale reservoirin Longmaxi Formation under scanning electronmicroscope-An example of well XY1 in Northeast Yunnan

作　　者：孙雄 薛晓辉 胡琳 李遇 SUN Xiong;XUE Xiaohui;HU Lin;LI Yu(Yunnan CBM Exploration and Development Co.,Ltd.,Kunming 650000,Yunnan,China;Yunnan Provincial Coal Geological Exploration Institute,Kunming 650218,Yunnan,China;Yunnan Coal Products Quality Test Station,Qujing 655000,Yunnan,China)

机构地区：[1]云南煤层气资源勘查开发有限公司,云南昆明650000 [2]云南省煤炭地质勘查院,云南昆明650218 [3]云南省煤炭产品质量检验站,云南曲靖655000

出　　处：《矿产与地质》2025年第1期152-159,共8页Mineral Resources and Geology

基　　金：云南省2023年度新一轮找矿行动基金项目(编号:Y202307)资助。

摘　　要：在页岩气勘探开发进程中,基于不同测试方法的扫描电镜技术发挥着越来越重要的作用。文章系统分析页岩储层评价中扫描电镜技术在大型多功能、专业化、小型化、智能化、立体化五个维度的发展趋势,总结以纳米级孔隙为主的扫描电镜表征体系;以滇东北XY1井龙马溪组富有机质页岩为重点研究对象,结合其区域构造、沉积、地层发育、储层特征等基础资料,采用扫描电镜(新鲜面)和氩离子抛光扫描电镜两种主要实验手段,观察不同手段下孔裂隙结构,提出了不同手段下的观察重点,分析了样品中微裂隙、有机质孔、无机孔(晶间孔、粒内孔、溶蚀孔等)、黏土矿物成分等发育状态,评价了样品孔裂隙发育条件及页岩储集空间特征,初步判断该储层页岩气具备勘探开发潜力。In the process of shale gas exploration and development,SEM technology based on different testing methods plays an increasingly important role.The development trend of SEM technology in the five dimensions of large-scale multifunction,specialization,miniaturization,intelligentization and stereoscopic in shale reservoir evaluation is analyzed systematically,the scanning electron microscope(SEM)characterizing system with nano-scale pores is summarized.Taking the organic shale of Longmaxi Formation in well XY1 in Northeast Yunnan as the research object,and combining with the basic data of its regional structure,sedimentation,stratigraphic development and reservoir characteristics,the pore structure is observed by scanning electron microscope(fresh surface)and argon ion polishing SEM(argon ion polishing),the development of micro-cracks,organic pores,inorganic pores(intercrystalline pores,intragranular pores,dissolution pores,etc.)and clay mineral composition in the samples are analyzed,the development condition of pore and fracture and the characteristics of shale reservoir space are evaluated,and the shale gas in this reservoir is judged to have a potential for exploration and development.

关 键 词：扫描电镜 龙马溪组 页岩 储集空间 纳米级 孔裂隙 

分 类 号：TE132[石油与天然气工程—油气勘探]