【摘要】 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（R₀=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R₀=0.58％～0.59％阶段呈现一个低谷;液态烃大量生成于R₀=0.65％阶段,产率峰值出现于R₀=1.09％阶段。进一步通过热模拟产物Pr/Ph、Pr/nC₁₇、Ph/nCl₁₈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（R₀=0.65％～1.09％）。更多还原

【Abstract】 Laboratory thermal simulation on liquid hydrocarbon generation and evolution of the Jurassic humic coals from the Turpan-Hami basin was carried out by means of dry-pyrolysis in absolutely sealed system. The results revealed that the coals give similar features of liquid hydrocarbon generation and evolution; the productivity of C12 THCs changes a little at the lower maturation stage of R0=0. 40%-0. 65% (original to 420 C ), while a peak of pyrolysate productivity occurs at the stage of R0 =0. 5% (240 C ) and a "valley"(mainly caused by polar fractions) occurs at the stage of R0=0. 58%-0. 59% (300 - 360 C ) ; the significant increase of C12- THCs begins at R0 = 0.65%; the peak productivity of C12- THCs appears at Ra= 1. 09% (540 C ) and hydrocarbon breakdown happens extensively at the overmature stage of R0=1. 94% (600 C). In addition, the variations of the important geochemical parameters such as saturates/aromatics ratio, Pr/Ph, Pr/nC17, and Ph/nC18, as well as n-alkane distribution were studied in detail. The variations of these parameters are closely related to that of the pyrolysate productivity and also to that of the natural maturation series of coal. The silmulation demonstrated that the generation and expulsion of liquid hydrocarbons (coal-derived oil) from the typical Jurassic humic coals should mainly occur at the maturation stage (R0 = 0. 65%-1. 09% ).更多还原