【摘要】 根据黄金管—高压釜封闭体系热模拟实验结果,结合古热史资料,研究了喀什凹陷侏罗系煤系烃源岩(煤和泥岩)的产气性与生烃史。研究表明,侏罗系煤和泥岩均具有较好的产气性,在中—高热演化阶段可生成较大量的天然气,且以产甲烷气为主。无论是煤,还是泥岩,喀什凹陷侏罗系烃源岩生气时间发生得晚,生气门限出现在5Ma,主生气期出现在3.5～1Ma。这种晚期生气特征为喀什凹陷天然气的晚期聚集成藏提供了较为有利的气源条件。更多还原

【Abstract】 On the basis of pyrolysis experiment results of closed-system of gold tube-high pressured reaction vessel, with the combination of paleo-thermal history data, studied was the histories of gas yields and hydrocarbon generated from Jurassic coal measures source rocks (coal and mudstone) in Kashi Sag. The results have shown that Jurassic coal and mudstone in Kashi Sag have better gas yields, which is able to produce a large amount of gaseous hydrocarbon at the middle-high thermal evolution stage, and mainly produce methane. It is demonstrated that Jurassic coal measures source rocks (coal and mudstone) in Kashi Sag generate gas relatively later, which enter the "gas window" in the last 5 Ma and main gas peak was at 3.5～1 Ma. The characteristics of late gas generation would provide the favorable hydrocarbon source for the late accumulation of natural gas in Kashi Sag.更多还原