含铀物质对有机质生烃的实验研究

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。

EXPERIMENTAL RESEARCH ON THE INFLUENCE OF U-BEARING MINERALS ON HYDROCARBON-GENERATION OF ORGANIC MATTER

A hydrothermal simulation method with a close container with water was employed to describe the characteristics of composition and volume hydrocarbon-generation and discuss the effect of uranium-bearing mineral on hydrocarbon generating process.It is suggested that the volume of gaseous and liquid hydrocarbons showed obvious increment.Uranium-bearing minerals were adopted as the catalyzer of mudstone and coal samples.Among them,the gaseous hydrocarbon yield of coal samples equally increases by 34%,and that of mudstone samples equally increases also by 30% or more.The liquid hydrocarbon productivity showed that the uranium-bearing minerals can promote the volume of liquid hydrocarbons from mudstone and coal samples.It was found that saturated hydrocarbon and arene tended to increase regularly during the high temperature stage with uranium-bearing minerals as the catalyzer by analyzing the composition of chloroform asphalt 'A' of mudstone.It is recognized that the high polymerization increased with the evolution of arene,and non-hydrocarbon and asphalt,even insoluble matter were transformed into saturated hydrocarbons.Comprehensive studies showed the radiogenic uranium plays an important role in hydrocarbon generation.