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吐哈盆地是典型的煤成油气盆地,主力烃源岩为中下侏罗统煤及含煤有机质.有机岩石学研究表明,吐哈盆地侏罗系烃源岩生油组分,在显微层次主要表现为基质镜质体、壳质组(主要是薄壁角质体、小孢子体和木栓质体)和少量腐泥组(主要是藻类体和沥青质体),在超微层次则主要表现为分布在基质镜质体和粗粒体中细菌成因的超微类脂体.基质镜质体是吐哈盆地煤成烃最主要的母质.壳质组(含腐泥组)在煤成烃中具有不可忽视的贡献. 采用密度梯度分离法从煤中分离出纯度较高的单组分(表1),进行热解气相色谱和核磁共振波谱测试,确定各显微组分生烃性质,并结合显微荧光性质确定其生烃阶段,由此建立煤与显微组分成烃模式.
The Turpan-Hami basin is a typical coal-formed gas-oil basin with the main source rocks being Middle-Lower Jurassic coal and coal-bearing organic matter.Studies on organic petrology show that the oil-producing components of the Jurassic source rocks in Turpan-Hami Basin are distributed at the microscopic level Mainly expressed as the matrix vitrinite, chitin group (mainly thin-walled keratoplasts, microspores and corkscrew) and a small amount of sapropel group (mainly algae and asphaltene), while in the sub-level is mainly The results showed that the bacteriocin was distributed in the matrix vitrinite and the body of bacteria in the micro-lipid body.The matrix vitrinite is the most important parent material of hydrocarbon generation in the Turpan-Hami basin.The crustal group (containing sapropel group) Hydrocarbons can not be neglected.The single component with high purity was separated from coal by density gradient separation (Table 1), pyrolytic gas chromatography and 1H nuclear magnetic resonance spectroscopy were used to determine the hydrocarbon generation property of each micro-component , And combined with the micro-fluorescence properties of its hydrocarbon generation stage, thus establishing coal and micro-component hydrocarbon generation mode.