利用偏光显微镜反射光系统观察黑色生油岩电子探针薄片中的生烃母质特征  

A Method for Observation of Characteristics of Hydrocarbon Generation Materials in Electron Probe Thin Sections of Black Source Rock by the Reflected-light Viewing System of a Polarized Optical Microscope

作　　者：郑庆华 刘行军 刘乔 梁秀玲 张小龙 左琴 杨开艳 马婷 许锋 ZHENG Qing-hua;LIU Xing-jun;LIU Qiao;LIANG Xiu-ling;ZHANG Xiao-long;ZUO Qin;YANG Kai-yan;MA Ting;XU Feng(School of Chemistry&Chemical Engineering,Yulin University,Yulin 719000,China;Changqing Division,China Petroleum Well Logging Limited Company,Xi’an 710201,China;No.5 Oil Production Plant,PetroChina Changqing Oilfield Company,Xi’an 710201,China;Fengcheng Field Operation District,PetroChina Xinjiang Oilfield Company,Karamay 834000,China)

机构地区：[1]榆林学院化学与化工学院,陕西榆林719000 [2]中国石油测井有限公司长庆事业部,陕西西安710201 [3]中国石油长庆油田公司第五采油厂,陕西西安710201 [4]中国石油新疆油田分公司风城油田作业区,新疆克拉玛依834000

出　　处：《岩矿测试》2020年第3期442-450,共9页Rock and Mineral Analysis

基　　金：榆林学院博士科研启动基金项目(18GK28)。

摘　　要：鄂尔多斯盆地上三叠统延长组长7油层组的黑色泥岩、油页岩等黑色生油岩薄片中的生烃母质,因黑色石油、沥青等黑色有机质的覆盖或不透明,导致其在偏光显微镜透射光系统下观察常局部或整体呈现为黑色。因此,建立一种黑色生油岩薄片中生烃母质有效观察的方法,对致密油、页岩油的生烃研究具有重要的理论和实际意义。本文提出了一种利用电子探针薄片和偏光显微镜的反射光系统观察黑色生油岩中生烃母质特征的方法。该方法能够克服黑色生油岩薄片中生烃母质因被黑色有机质覆盖或不透明,而在偏光显微镜的透射光系统下局部或整体呈黑色的弊端,能够对生烃母质的大小、形态、结构、分布和物质成分等特征进行整体且清晰的观察。实践表明,本文提出的利用偏光显微镜反射光系统观察黑色生油岩电子探针薄片中生烃母质特征的方法,简单有效,易在致密油、页岩油的生烃研究领域推广使用。BACKGROUND:The hydrocarbon generation materials in thin sections of black source rocks(such as black mudstone,oil shale),from the Chang 7 Member of the Upper Triassic Yanchang Formation in the Ordos Basin,are often partially or entirely black under the transmitted-light viewing system of a polarized optical microscope,because they are covered by black organic matter(such as oil,asphaltene)or opaque.OBJECTIVES:To put forward an effective method to observe the hydrocarbon generation materials in thin sections of black source rock.METHODS:A method for observation of characteristics of hydrocarbon generation materials of black source rock was proposed,using the reflected-light viewing system of a polarized optical microscope on electron probe thin sections.RESULTS:The method can overcome the problem that hydrocarbon generation materials in thin section were covered by black organic matter or were opaque.The size,shape,structure,distribution of hydrocarbon generation materials and composition can be entirely and clearly observed in thin sections of black source rock.CONCLUSIONS:In the long-term test,it has been proved that the method for observation of characteristics of hydrocarbon generation material in thin sections of black source rock by the reflected-light viewing system of a polarized optical microscope is simple and effective,and can be easily used in the study of hydrocarbon generation of tight oil and shale oil.

关 键 词：黑色生油岩 黑色有机质 生烃母质 偏光显微镜反射光系统 电子探针薄片 

分 类 号：P575.1[天文地球—矿物学]