三塘湖盆地芦草沟组页岩有机显微组分扫描电镜研究  

SEM study on organic macerals of shale in Lucaogou Formation Santanghu Basin

作　　者：焦淑静[1] 张慧 薛东川 JIAO Shu-jing;ZHANG Hui;XUE Dong-chuan(College of New Energy and Material,China University of Petroleum,Beijing 102249;SGS Unconventional Petroleum Technical Testing (Beijing) Co. Ltd.,Beijing 102200;CNOOC Research Institute,Beijing 100027,China)

机构地区：[1]中国石油大学(北京)新能源与材料学院,北京102249 [2]瑞华通正非常规油气技术检测有限公司,北京102200 [3]中海油研究总院有限责任公司,北京100027

出　　处：《电子显微学报》2019年第3期257-263,共7页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金项目资助(No.41774129)

摘　　要：三塘湖盆地芦草沟组泥页岩处于低成熟-成熟早期阶段,热演化成熟度适宜,源岩有机质丰度高,类型好,以I型和II型为主;大量烃类滞留于烃源岩中,形成页岩油,为一套优质烃源岩。扫描电镜具有放大倍数高,图像立体感强,制样方法简单等优点,使得显微组分原始状态及与矿物接触关系得以保存,是研究有机显微组分的良好手段。芦草沟组页岩有机显微组分种类丰富,笔者利用扫描电镜及能谱仪,通过形貌特征、赋存状态及化学成分识别出了腐泥组、镜质组、惰质组、壳质组和动物有机碎屑,五大显微组分组中的沥青质体、镜质体、丝质体、孢粉体、角质体、树脂体和动物碎屑体等七种显微组分,并详细介绍了每种显微组分的形成原因、形态特征及识别方法。芦草沟组页岩中,沥青质体是最主要的显微组分,具有很好的生烃潜力。The shale of Lucaogou Formation in the Santanghu Basin is in the low maturity and the thermal maturity is in good stage. The total organic carbon(TOC) is high and the organic matter types are type I and type II. A large number of hydrocarbons are retained in the source rocks so the shale of Lucaogou Formation is a set of high quality hydrocarbon source rocks. Scanning electron microscopy (SEM) has the advantages of high magnification strong stereoscopic image and simple sample preparation. The method of sample preparation can preserve the contact relationship between the macerals and minerals so it is a good means to study the organic macerals. The type of organic macerals in the Lucaogou shales is rich. We identified seven types of organic macerals by SEM and energy disperse spectroscopy(EDS) which are bituminite vitrinite fusinite sporinite cutinite resinite and animal detritus. Bituminite is the main organic maceral and the hydrocarbon potential is high.

关 键 词：芦草沟组 页岩 有机质 有机显微组分 扫描电镜 

分 类 号：P575.2[天文地球—矿物学] P588[天文地球—地质学]