Based upon microcal rock and reflectance of coal rock,the paper analyses the heatalteration of ripening index of organic matter.It has practical value for evaluating gas storageconidion of coal bed.

• 通过研究显微镜质组分、镜质组分反射率，分析了有机质成熟度的热演化趋势，对评价气源岩的储气条件具有实用价值。