基于孔隙结构表征的煤层顶板油气层岩石流体赋存特征  

The characteristics of rock fluid occurrence in oil-gas layer of coal seam roof based on pore structure characterization

作　　者：王文博 许志龙 宋涛 刘坤 Wang Wenbo;Xu Zhilong;Song Tao;Liu Kun(Yan’an Che village Coal industry(Group)Co.,LTD,Yan’an 710060;Fuxian Mining development Co.,LTD,Yan’an 710060)

机构地区：[1]延安车村煤业(集团)有限责任公司,陕西延安710060 [2]富县矿业开发有限公司,陕西延安716000

出　　处：《石化技术》2024年第9期199-200,共2页Petrochemical Industry Technology

摘　　要：以鄂尔多斯盆地富县矿区煤层顶板延安组砂岩为研究对象,综合铸体薄片、扫描电镜及核磁共振实验结果,探讨了顶板砂岩孔隙结构特征对油气赋存的影响。结果表明,延安组砂岩孔隙-喉道大小分布范围广,普遍为双峰分布,残余粒间孔及溶蚀孔组成大孔喉系统,而晶间孔构成了微小孔喉系统,孔喉体积及连通能力是影响砂岩中油气赋存的关键因素。The effect of pore structure characteristics on the occurrence of oil and gas in the roof sandstone of Yan’an Formation of coal seam in Fuxian mining area of Ordos Basin is discussed based on the results of cast thin section,SEM and NMR experiments.The results show that the size distribution of pore-throat in Yan’an Formation sandstone is wide and bimodal.Residual intergranular pores and solution pores form a large pore throat system,while intergranular pores form a small pore throat system.Pore throat volume and connectivity are the key factors affecting the occurrence of oil and gas in the sandstone.

关 键 词：煤层顶板 富县矿区 孔隙结构 流体赋存 

分 类 号：P618.13[天文地球—矿床学]