中文摘要：

以燃料油为研究对象进行室外自然风化实验（0~100 d）,探讨了金刚烷的风化规律,在同一风化条件下,比较了燃料油和原油中金刚烷组分的风化特征。结果表明：燃料油中单金刚烷在风化60 d内全部被降解,渤海原油1号中单金刚烷在风化45 d内被降解完全,双金刚烷受风化影响较小。通过t检验分析,所选诊断比值中,燃料油中有7个金刚烷指标在风化20 d内保持稳定,双金刚烷指标DMDI-3、DMDI-4和DMDI-5在自然风化100 d内具有较好的稳定性,适合于长时间风化条件下溢油的鉴别。与渤海原油1号相比,燃料油中双金刚烷诊断比值稳定性更好,这可能与燃料油中双金刚烷浓度高、数据信号强、计算过程引入的误差小有关。

英文摘要：

The changes of diamondoid compounds in the fuel oil sample during natural long-term weathering（ 0 ~ 100days） were presented. Adamantanes in fuel oil were not found after 60 day natural weathering,adamantanes in crude oil from Bohai sea No. 1 were not found after 45 day natural weathering. The concentrations of diamantanes slightly decrease with an increase of weathering time and diamantanes have stronger weathering-resistant capabilities. According to the ＂Student＇s t＂test,seven ratios of diamantanes had no apparent changes which could indicate the source of the samples during 20 days weathering. Diamantanes ratios of DMDI-3,DMDI-4 and DMDI-5 are essentially unaltered after 100 days natural weathering which could indicate the source of the samples during natural long-term weathering. The diagnostic ratios of diamantanes in fuel oil are relatively more stable compare with those in crude oil.