【摘要】 通过热模拟实验的方法,研究泥岩、油页岩和煤的有机质分子组成的热演化特征。结果表明:烃源岩有机质分子组成有较大差别,甾烷、萜烷的分布型式也显著不同,但成熟作用使得甾烷、萜烷分布型式的差异减小。发现有机质类型对高成熟样品的镜质体反射率 R。值有较大影响,岩石中矿物基质的种类与含量直接影响甾烷、萜烷异构化比值的大小。黄县褐煤与茂名油页岩模拟样品成熟度相近,但由于这些因素的影响,黄县褐煤的 R_o 值大于茂名油页岩,茂名油页岩的甾烷、萜烷异构化比值大于黄县褐煤。文中还对烷基环己烷系列化合物、D 环芳构化8,14-断藿烷的热演化特征进行了初步讨论。更多还原

【Abstract】 The molecular composition and thermal evolution characteristics of organic matters in shale, oil shale and coal are studied by using a thermal simulation method. It is indicated by the results that, the molecular composition of organic matters varies greatly and the distribution patterns of sterane and terpane are different from one source rock to another, however the maturity makes the difference of distributive paterns of sterane and terpane smaller. It is found that the type of organic matters gives larger effect on R_o value of high maturity samples, and the type and content of miner- als have direct effect on isomer ratio of sterane and terpane. Due to these factors, the maturity of simulated samples of Huangxian brown coal and Maoming oil shale is similar, the R_o value of Huangxian brown coal is greatler than that of Maoming oil shale and the isomer ratio of sterane and terpane in Maoning oil shale is higher than that of Huangxian brown coal.更多还原