二次生烃的蓝移现象

通过对4件腐泥型煤及3件腐殖型煤样品的热解模拟,对二次生烃中出现的蓝移现象加以探讨,得出主要结论为:1)"红移"和"蓝移"现象是芳香环缩合度、烃类生成量、从干酪根大分子网络结构中排烃速度这3者的综合体现;2)干酪根大分子结构的分子筛作用,是产生"蓝移"现象的直接原因;3)"蓝移"现象与二次生烃迟滞效应密切相关;4)原始成熟度以及原始样品中壳质组或腐泥组含量共同控制"蓝移"程度,原始成熟度处于"生油窗"、同时样品中含有一定量的壳质组分或腐泥组分时,"蓝移"较强;5)当有壳质组分或腐泥组分含量的保证时,"蓝移"程度在"生油窗"下限附近达到最强.

BLUE SHIFTING PHENOMENA IN HYDROCARBON RE-GENERATION

By pyrolytic simulation to four samples of sapropelite and three samples of humilite for the blue shifting phenomena in hydrocarbon re-generation, we draw the conclusions as follows.1)The phenomenon,red shifting and blue shifting,is the comprehensive embodiment of three factors,namely, the condensation extent of aromatic ring, generating quantity of hydrocarbon, and the release speed from the kerogen’s big molecule wet structure. 2)The molecular sieve effect of the kerogen’s big molecule wet structure is a direct reason. 3)There is a close relation between the blue shifting and lagging effect of thd hydrocarbon re-generation. 4)The intensity of the phenomena is controlled by the original maturity and content of exinite and sapropelinite. If the original maturity lie in the “window of generating oil”,with stated quantity of exinite and sapropelinite in the sample, the extent of blue shifting is stronger.