摘要 为深化吉木萨尔凹陷芦草沟组页岩储层孔隙及含油性认识,通过氩离子抛光、场发射扫描电镜、核磁共振、微纳米CT及激光共聚焦实验技术,对芦草沟组微纳米孔隙类型、成因及含油特征进行研究。结果表明,微纳米级孔隙按照成因分为无机矿物晶间孔和有机质生烃孔两大类。微纳米孔隙中重质组分附着于颗粒表面或充填于纳米级小孔中,轻质组分主要赋存于较大的亚微米级孔隙,孔隙中心含水。“甜点”岩性微纳米孔隙孔喉直径主体在100 nm~10μm之间,占比71.8%~93.5%,孔隙类型以无机矿物晶间孔为主,连通性较好且普遍含油。微纳米孔隙具有良好的开发前景,是页岩油提高采收率的重要方向之一。 In order to deepen the understanding of the pore and oil bearing in the shale reservoir of Lucaogou Formation in Jimusar Depression.The genesis and oil-bearing characteristics of the micro-nano pores in the Lucaogou Formation were studied by argon ion polishing,FESEM,NMR,micro-nano CT and CLSM.The results show that there are two types of micro-nanometer porosity according to their genesis:intercrystalline pore of inorganic mineral and hydrocarbon generation pore of organic matter.The heavy components in the micro-nano pores are attached to the particle surface or filled in the nano-sized pores,while the light components mainly occur in the large sub-micron pores with water in the pore center.The main diameter of dessert micro-nano pore and throat is between 100nm~10um,accounting for 71.8%~93.5%.The pore types are mainly intercrystalline pores of inorganic minerals,with good connectivity and generally oilcontaining.Micro-nano pore has a good development prospect and it is one of the important directions to enhance oil recovery of shale oil.
出处 《新疆地质》 CAS CSCD 北大核心 2021年第1期94-98,共5页 Xinjiang Geology
基金 国家科技重大专项(2017ZX05008-004-008) 中国石油科技重大专项(2017E-0401)联合资助。
关键词 微纳米孔隙成因 含油特征 页岩油 芦草沟组 吉木萨尔凹陷 Micro-nano pore genesis Oil bearing characteristics Shale oil Lucaogou Formation Jimusar depression
