吉木萨尔芦草沟组页岩储层孔隙结构与流体可动性研究  

Study on pore structure and fluid mobility of shale oil in Jimsar Lucaogou Formation

作　　者：沈瑞[1] 覃建华[2] 熊伟[1] 高阳[2] 何吉祥 杨航 张晓祎 郭和坤[1] 周洪涛 SHEN Rui;QIN Jianhua;XIONG Wei;GAO Yang;HE Jixiang;YANG Hang;ZHANG Xiaoyi;GUO Hekun;ZHOU Hongtao(Research Institute of Petroleum Exploration&Development,PetroChina Company Limited,Beijing 100083,China;Research Institute of Exploration and Development of Xinjiang Oilfield Branch Company,PetroChina,Karamay 834000,China;School of Engineering Science,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [3]中国科学院大学工程科学学院,北京100049

出　　处：《中南大学学报（自然科学版）》2022年第9期3368-3386,共19页Journal of Central South University:Science and Technology

基　　金：中国石油天然气股份有限公司前瞻性基础性重大科技项目(2021DJ4506,2021DJ1103)。

摘　　要：利用原子力显微镜、小角中子散射、高压压汞和T_(1)−T_(2)二维核磁共振岩心分析等实验技术,对页岩油储层中不同岩性样品的孔隙结构、表面粗糙度、全尺度孔径分布和可动油饱和度进行定量研究。研究结果表明:粉砂岩的孔径分布曲线多为连续波浪型,孔隙以亚微米孔为主,大多数孔隙直径小于500 nm,宏孔孔容和平均孔径更大。粉砂岩含有狭缝状或楔形粒间孔隙,砂屑云岩中含有粒间孔和粒内溶孔。云质泥岩样品中存在干酪根和沥青核磁信号,并发育中小尺度的有机质孔隙,可动油平均饱和度为15.6%。粉砂岩可动油平均饱和度为53.8%。粉砂岩是优质储层发育的成岩相,也是水平井靶体目的层。The pore structure,surface roughness,full-scale pore size distribution and movable oil saturation of different lithologic samples in shale oil reservoir were quantitatively studied by using experimental techniques such as atomic force microscope,small angle neutron scattering,high-pressure mercury injection and T_(1)−T_(2) twodimensional nuclear magnetic resonance core analysis.The results show that the pore size distribution curve of siltstone is mostly continuous wave type.Submicron pores are the main proportion of pores.Most of the pore diameters are less than 500 nm,and the macro pore volume and average pore diameter are larger.Siltstone contains slit or wedge-shaped intergranular pores,and dolarenite contains intergranular pores and intragranular dissolved pores.Kerogen and asphalt signals exist in the cloud mudstone samples,and small and medium-sized organic matter pores are developed.The average movable oil saturation is 15.6%.The average movable oil saturation of siltstone is 53.8%.Siltstone is the diagenetic facies developed by high-quality reservoir and the target layer of horizontal well target.

关 键 词：页岩 原子力显微镜 小角中子散射 核磁共振 孔隙结构 可动油 

分 类 号：TE311[石油与天然气工程—油气田开发工程]