桦甸油页岩有机岩相特征及其富集特性

为了研究油页岩中有机组分结合特性对有机质分离富集的影响,利用薄片透射光、反射单偏光、反射荧光等煤岩学研究手段研究桦甸油页岩中有机组分的种类、含量及赋存状态,并利用两种密度分离手段研究油页岩中有机质的解离特性.结果表明,桦甸油页岩有机质的变质程度较低,有机显微组分以沥青质体为主,占85.8%,镜质组和惰质组含量较低;有机质与矿物结合紧密,形成有机-矿物复合体,密度分离方法对有机质与矿物质分离效果有限;浮沉实验小于1.40g/cm³密度级样品的热解失重量及失重速率均低于较高密度级产物,这与颗粒状镜质组、惰质组与矿物质结合程度相对较差,在较低密度级产物中富集有关.

Petrology and enrichment characteristics of organic matters in Huadian oil shale

The enrichment characteristics of organic matters were determined by its petrology. The types and contents of macerals in Huadian oil shale were examined with 3 common microscope lighting conditions (transmitted light, reflected polarized light and reflected fluorescent light). Then two separation methods based on density difference were used to study liberation of organic mattes from minerals. A low degree of metamorphism was found for organic matters in Huadian oil shale. The macerals were dominated by bituminite accounting for 85.8%. The contents of vitrinite and inertinite were low. Closely integrated with minerals, the organic matters were formed as organic-mineral aggregates. It was difficult to separate the organic matters from minerals using physical methods. Both the weight loss and differential weight loss of samples with density < 1.40g/cm³ were lower than that of higher density from float-and-sink analysis. This was attributed to that a small amount of vitrinite and inertinite particles was enriched in low density product due to their less integration with mineral matter.