安岳气田须二段致密砂岩储层特征及主控因素  

Characteristics and main control factors of dense sandstone reservoir in the second member of Xujiahe formation in the Anyue gas field

作　　者：尹浪 王海峰 汪春浦 王家辉 文彩琳 YIN Lang;WANG Haifeng;WANG Chunpu;WANG Jiahui;WEN Cailin(Sichuan Hengyi Petroleum Technical Service Co.,Ltd.,Chengdu 610056,Sichuan province,China;CNCP Chuangqing Drilling Geological Exploration and Development Research Institute,Chengdu 610056,Sichuan province,China)

机构地区：[1]四川恒溢石油技术服务有限公司,成都610056 [2]中国石油川庆钻探地质勘探开发研究院,成都610056

出　　处：《地质找矿论丛》2025年第1期53-62,共10页Contributions to Geology and Mineral Resources Research

摘　　要：为探索四川盆地中部安岳气田须二段致密砂岩储层地质条件,加强对该区储层地质特征的认识,通过岩心观察、铸体薄片鉴定、XRD衍射和扫描电镜等方法,对四川盆地安岳气田须二段致密气藏储层的岩性、物性、孔隙结构及储层主控因素开展系统分析。研究结果显示:该区主要由纯净的砂岩组成,且成熟度较高;孔隙度主要集中在5%~9%,渗透率的分布范围为0.01~1 mD,根据行业标准,为典型的低孔致密型储层。孔隙结构以微小孔隙为主,连通性较差,孔喉的分布范围为差到中等水平。在此基础上开展储层主控因素分析,研究认为,研究区储层储集能力受到沉积作用、成岩作用的共同影响,其中沉积微相是发育优质储层的基础,成岩作用中溶蚀作用是改善储层品质的重要因素。Observation of drilling core,identification of thin section of cast,XRD analysis and systematic analysis of lithology,physical property,pore structure and main control factors of the dense sandstone reservoir of the second member of Xujiahe formation in Anyue gas field in the central Sichuan basin are carried to explore the geological condition and strengthen understanding of the reservoir.The sandstone is pure with high maturity,porosity 5%~9%and permeability 0.01~1 mD.According the industrial standard the reservoir is a typical low porosity dense reservoir.The pore is mainly micro-pore with poor connectivity.The pore throat is medium-poor.Storage capacity of the reservoir is influenced by both of sedimentation and diagenesis of the sandstone.Sedimentary micro-facies is the base for development of high quality reservoir and diagenetic dissolution and erosion improve the reservoir.

关 键 词：致密气 孔隙结构 成岩作用 储层特征 安岳气田 

分 类 号：P618.13[天文地球—矿床学] TE122.2[天文地球—地质学]