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采用密闭容器水热模拟实验方法,考察含铀物质对有机质热解生烃过程的影响。对热模拟实验产物分析发现,在暗色泥岩和煤岩样品中加入含铀物质后,气态烃和液态烃的生烃量都有比较明显的增加。其中煤岩的气态烃产量平均增加值为34%,而泥岩样品平均增加值也达到了30%以上。液态烃产率分析表明,含铀矿物也促进了泥岩和煤岩的液态烃产率。从泥岩氯仿沥青‘A’族组成分析表明,加入催化剂后泥岩的饱和烃和芳烃在高温阶段具有规律性的明显增大的趋势,反映出非烃和沥青质,甚至不溶有机质向相对稳定的饱和烃转化以及芳烃随演化程度增加的高聚合作用。综合以上分析,认为放射性铀对油气生成具有氧化催化作用。
A closed vessel hydrothermal simulation experiment method was used to investigate the effect of uranium-bearing material on the hydrocarbon generation process of organic matter pyrolysis. The results of the thermal simulation experiment show that after the uranium-bearing material is added into the dark mudstone and coal rock samples, the hydrocarbon generation amount of the gaseous and liquid hydrocarbons increases obviously. Including coal and gas production of gaseous hydrocarbons increased by an average of 34%, while the average added value of mudstone samples also reached more than 30%. Liquid hydrocarbon yield analysis shows that uranium-bearing minerals also contribute to the liquid hydrocarbon yield of mudstone and coal rock. The analysis of the ’A’ composition of mud bitumen showed that the saturated and aromatics of mudstone after the addition of catalyst showed a regularly increasing trend at high temperature, reflecting the relatively stable saturation of non-hydrocarbon and asphaltene, even insoluble organic matter Hydrocarbon conversion and high polymerization of aromatics with increasing degree of evolution. Based on the above analysis, it is considered that radioactive uranium has an oxidative catalytic effect on hydrocarbon generation.