用光学方法研究煤成油岩石学标志

THE PETROLOGIC INDICATION OF COAL-FORMED OIL

从有机岩石学的角度出发，运用光学研究方法和研究手段，观察和分析了准噶尔盆地侏罗纪煤系源岩及其相关原油，提出了煤（显微组分）成油的岩石学标志。应用共聚焦激光扫描显微镜，在国内首次检出原油中镜质体碎屑，其镜质体反射率值与侏罗纪煤镜质体反射率值相近，地化分析结果也表明该原油具有高等植物输入的特征。显微镜下观察发现侏罗纪煤中存在大量的成烃次生组分：油滴、油膜、渗出沥青质体以及微粒体。原油中镜质体碎屑的检出以及成烃次生组分的发现，为煤成油的存在提供了可靠的有机岩石学证据。

This paper studied the source rocks and oil samples related to the coal measures in Junggar basin from the view of organicpetrology. Signs were raised for identifying coal-formed oil. The discovery of submacerals (including exudatinite, oil drips,micrinite) under optical microscope directly proved that the coal measures could generate oil' By means of advanced CLSM weobserved Jurassic crude oil samples, and discovered detrovitrinite in'crude oil firstly' The value of detrovitrinite reflectance isclose to the value of vitrinite reflectance- Also the analysis of organic geochemistry showed that the oil owned the biomarkersfrom high plants. The substance offered reliable evidence for identifying coal-formed oil.