含铀物质对泥岩有机质热模拟生烃产物的影响

Effect of Uranium Substance on Hydrocarbon Generation from Mudstone by Hydrous Pyrolysis

有机—无机相互作用是沉积盆地中普遍存在且不可改变的事实。采用加水热模拟实验方法,考察了含铀物质对泥岩样品热解生烃产物的影响。结果发现,含铀物质的加入,极大的提高了泥岩热解产物中气体产物的生成量。对气体组分的分析表明,产物中二氧化碳的含量增加,而甲烷的含量较少,一氧化碳的含量则呈现先增加后减少的趋势,对液态抽提物的分析发现,含铀物质促进了热解过程中产生的高碳数正构烷烃的降解,使得抽提物中饱和烃族组分的轻重比值有所增加,同时,含铀物质对泥岩热解产生的甾、萜烷类生物标志化合物也产生了一定的影响。

Organic-inorganic interactions are ubiquitous and unalterable in sedimentary basin. In this paper, effect of uranium substance on the mudstone pyrogenation was studied by hydrous pyrolysis. From the experiments, huge in- crease of the gas yields was observed. Further investigations showed that the content of carbon dioxide increased, while the content of methane decreased, and carbon monoxide was one of the metastable intermediates during the hy- drous pyrolysis. At the same time, the high molecular weight hydrocarbons seemed to be more degraded by the urani- um substance. The generated sterane and terpane from the hydrous pyrolysis were also affected by the uranium sub- stance