新疆三塘湖盆地侏罗系煤热解参数的有机岩石学研究

An Organic Petrological Research on Rock Eval Pyrolysis Parameters of Coal from the Jurassic in Santanghu

对新疆三塘湖盆地侏罗系１１个煤样进行了Ｒｏｃｋ－Ｅｖａｌ热解分析、显微组分定量分析、镜质体反射率测定及元素分析，不同方法所评价的煤有机质类型存在着一定的差异。通过对显微组分构成、沉积－成岩环境及有机质成熟度等因素的综合剖析，认为三塘湖盆地侏罗系煤中含量较高的富氢显微组分（４％～１９％）和成熟度是影响氢指数（ＩＨ）、Ｈ／Ｃ原子比的主要因素，并对煤有机质类型的评价产生了一定的影响。

A series of the Jurassic coals in Santanghu Basin has been studied by Rock Eval pyrolysis, white microscopy, and element analysis, with an aim of evaluation of coals type. The results obtained by Rock Eval pyrolysis are different from those by the other approaches. The influences, such as maceral composition, deposit diagenetic environment and maturity, have been analysed, the conclusion is that high content of hydrogen rich maceral(4%￣19%) in the coals and the maturity are important effects on hydrogen index, H/C atomic ratio, and types of coal. The method in evaluating coal types was discussed as well in the present paper.