松辽盆地北部林甸地区青山口组一段页岩储层特征及主控因素  

Reservoir characteristics and main controlling factors of the first member of Qingshankou Formation shale in the Lindian Area,Northern Songliao Basin

作　　者：赵肖飞 李王鹏 葛勋 李沛 葛小瞳 刘雅利 吴海光 吕修祥[1] ZHAO Xiaofei;LI Wangpeng;GE Xun;LI Pei;GE Xiaotong;LIU Yali;WU Haiguang;LYU Xiuxiang(College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;St-ate Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development,SINOPEC,Beijing 102206,China;Shale Oil and Gas Exploration and Development Key Laboratory,SINOPEC,Beijing 102206,China;Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 102206,China;School of Geosciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石化页岩油气富集机理与高效开发全国重点实验室,北京102206 [3]中国石化页岩油气勘探开发重点实验室,北京102206 [4]中国石化石油勘探开发研究院,北京102206 [5]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《东北石油大学学报》2024年第6期31-48,I0003,I0004,共20页Journal of Northeast Petroleum University

基　　金：国家自然科学基金项目(41902149);中国石化科技部项目(P23092)。

摘　　要：以松辽盆地北部林甸地区青山口组一段(青一段)页岩为研究对象,采用岩心观察、薄片鉴定、有机地球化学分析、X线衍射全岩矿物和扫描电镜等方法,分析林甸地区青一段页岩沉积构造、总有机碳质量分数、热解生烃潜量、矿物组分和储集物性等,构建跨区域(林甸—古龙—三肇凹陷)东西向、南北向3条剖面,研究页岩储层特征及主控因素。结果表明:林甸地区青一段发育黏土质页岩、长英质页岩、钙质页岩、钙质—长英质混合页岩、黏土—长英质混合页岩、碳酸盐岩、粉砂岩7种岩石类型,优势页岩为黏土质页岩、长英质页岩;岩石矿物分为黏土质矿物、碳酸盐矿物及石英和长石矿物3类,其中石英和长石矿物质量分数最高,平均为52.0%;页岩储层具有低孔隙度、低渗透率特征,页岩有效孔隙度介于4.0%~6.5%,渗透率分布在(0.101~0.550)×10^(-3)μm^(2)之间,存在明显的非均质性;页岩油为源—储一体型中低熟油,页岩油以滞留富集为特征,有机质类型以Ⅰ型为主,岩石类型、有机质类型、有机质丰度和物性特征对含油性具有明显控制作用。该结果为认识林甸地区青山口组页岩发育储层特征、页岩油富集特点和勘探潜力提供参考。The first member of Qingshankou Formation shale in the Lindian Area in the northern part of the Songliao Basin was taken as the object of study,and the sedimentary structure,total organic carbon mass fraction,pyrolytic hydrocarbon potential,mineralogical fractions and reservoir properties of the first member of Qingshankou Formation shale in the Lindian Area were analyzed on the basis of the methods of rock-core observation,flake identification,organic geochemistry,X-ray diffraction of the whole-rock minerals and scanning electron microscopy.We constructed three cross-regional(Lindian-Gulong-Sanzhao Depression)east-west and north-south profiles to study the shale reservoir characteristics and main controlling factors.The study shows 7 rock types are developed in the first member of Qingshankou Formation in Lindian Area,in order of clay shale,felsic shale,calcareous shale,calcareous-silty mixed shale,clayey-silty mixed shale,carbonate rock and siltstone,with the dominant shale being clay shale and felsic shale,among which the shale petrographic mineralogical composition is characterized by the highest content of quartz and feldspar with the average content of 52.0%.The shale reservoir in Lindian Area is characterized by low porosity and low permeability,the effective porosity of shale is between 4.0%6.5%,the permeability of shale is distributed between(0.1010.550)×10^(-3)μm^(2),and there exists obvious non-homogeneity.The shale oil in the first member of Qingshankou Formation in Lindian Area is a source and reservoir type of medium-low maturity oil,and it is characterized by stagnant enrichment,and the rock type,organic matter type,organic matter abundance,and physical characteristics have obvious control over the oil content.The results are of positive significance for recognizing the reservoir characteristics of shale development,shale oil enrichment characteristics and exploration potential of Qingshankou Formation in the Lindian Area,and provide theoretical guidance for realizing the breakthrough of land-pha

关 键 词：松辽盆地 林甸地区 青山口组 页岩油 储层特征 控制因素 

分 类 号：TE122.2[石油与天然气工程—油气勘探]