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利用绝对密闭式干热解方法对吐哈盆地侏罗系腐殖煤的液态烃生成演化规律进行了研究。研究结果表明,煤在低成熟阶段(R_0=0.40％～0.65％)的液态烃产率变化幅度较小、地球化学特征也保持未熟—低熟特征;热解物产率曲线在R_0=0.58％～0.59％阶段呈现一个低谷;液态烃大量生成于R_0=0.65％阶段,产率峰值出现于R_0=1.09％阶段。进一步通过热模拟产物Pr/Ph、Pr/nC_(17)、Ph/nCl_(18)及饱/芳值等参数的变化规律、热解物正构烷烃分布特征、热模拟残渣的热解色谱特征,及与典型煤成油进行对比研究.证实了侏罗系煤成液态烃主要生成并排驱于成熟阶段(R_0=0.65％～1.09％)。
The formation and evolution of liquid hydrocarbons in the Jurassic coal in the Turpan-Hami basin were studied by absolute closed dry pyrolysis. The results show that the rate of change of liquid hydrocarbon in coal at low maturity stage (R 0 = 0.40% -0.65%) is small and the geochemical characteristics remain unfresh-low maturity. The yield curve of pyrolysis products is in the range of R 0 = 0.58% 0.59% shows a low trough. Liquid hydrocarbons are abundantly produced in the stage of R_0 = 0.65%, and the peak of the yield appears in the stage of R_0 = 1.09%. Furthermore, the variation regularity of parameters such as Pr / Ph, Pr / nC_ (17), Ph / nCl_ (18) and saturated / aromatic value of pyrolysis products were determined. The pyrolysis chromatograms of pyrolysis products , And compared with the typical coal-formed oil, confirmed that the Jurassic coal-to-liquid hydrocarbons mainly formed and led to the mature stage (R_0 = 0.65% ~ 1.09%).