【摘要】 在压力高达1～3GPa、温度为400～700℃的条件下,在密闭体系中进行了褐煤加水的模拟实验。分析了实验产物中液态烃的变化规律,并讨论了压力、温度及恒温时间对有机质演化的影响。实验结果表明,热模拟液态产物氯仿沥青“A”的有机碳含量为0.91%～2.55%,2GPa条件下其高峰值后移至700℃,说明高压抑制了液态烃的生成,同时压力升高有利于有机质降解产物的环化、聚合和芳构化。在400～600℃条件下,温度升高或恒温时间增长,OEP和Pr/Ph值均减小;而在700℃的恒温条件下,压力增高,OEP和Pr/Ph值均增大。说明有机质的成熟度与温度和加热时间成正相关,而压力增加抑制了有机质的成熟演化。在高压条件下,芳烃演化的主要趋势是甲基化作用,压力升高有利于甲基化反应和甲基重排。更多还原

【Abstract】 Simulation test of lignite, added with water was made in the closed system at high temperature ( 400 - 700℃ ) , high pressure (1 - 3GPa). Changing tendency of the liquefied hydrocarbon in the experimental products was analyzed. The influence of pressure, temperature and time of constant temperature on organic matter evolution was discussed. The experimental results show that the organic carbon content of chloroform bitumen " A" ,which is a liquefied product of thermal simulation, is 0. 91% - 2. 55% , and its peak value occurred back to 700℃ when pressure was 2GPa. It shows that high - pressure restrained formation of liquefied hydrocarbon and pressure raise was favorable to the cyclo - polymerization and aromati-zation of degradation products of organic matter. Both values of OEP and Pr/Ph decreased at temperature of 400 - 600℃ when temperature raising orconstant - temperature time increasing; both values of OEP and Pr/Ph increased at constant temperature of 700℃ when pressure raising. It indicate that the organic maturation is of positive correlation with temperature and heating time,but pressure raise restrains maturation and evolution of organic matter. The main trend of aromatic hydrocarbon evolution is methylation action. The pressure raise is favorable to methylation reaction and methyl rearrangement.更多还原