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本文根据双金刚烷的形成机理、各同分异构体之间的热演化关系以及西藏双湖地区T-J系烃源岩饱和烃组分中双金刚烷类化合物气相色谱-质谱实际检测结果,提出了5项双金刚烷指数,通过与Ro进行相关性分析,初步确定甲基双金刚烷指数MD11可作为一种新的烃源岩成熟度参数应用。根据广西百色褐煤的(Ro=0.46%)热模拟实验,探讨了MD11指数的热演化规律:MD11指数与Ro具有良好的正相关性,相关系数为0.83,作为有机质热成熟度指标,其应用范围在成熟和高成熟阶段。
Based on the formation mechanism of the bimamantane, the thermal evolution relationships among the isomers and the actual results of the double-adamantane GC-MS in the T-J hydrocarbon source rocks in the Shuanghu area, Tibet, , 5 biadamantane indices were proposed. According to the correlation analysis with Ro, it was preliminarily confirmed that the methyl-2-adamantane index MD11 could be used as a new maturity parameter of source rock. According to the thermal simulation experiment of Guangxi Baise brown coal (Ro = 0.46%), the thermal evolution of the MD11 index is discussed: the MD11 index has a good positive correlation with Ro, and the correlation coefficient is 0.83. , Its application in the mature and highly mature stage.