原油及烃源岩成熟度的新指标——甲基双金刚烷指数

A NEW INDEX FOR THE MATURITY OF CRUDE OIL AND HYDROCARBON SOURCE ROCK——METHYLDIADAMANTANE INDEX

郑伦举 曹建平 薛建华 别道哲

Zheng Lunju Cao Jianping Xue Jianhua Bie Daozhe

中国新星石油公司, 勘探研究院, 湖北, 荆州, 434100 2. 中国新星石油公司, 实验地质研究院, 江苏, 无锡, 214151 3. 中国新星石油公司, 华东石油局地质研究院, 江苏, 扬州, 225002 4. 湖北省水文队实验室, 荆州, 434100

Research Institute of Exploration, CNSPC, Jingzhou, Hubei 434100 2. Research Institute of Experimental Geology, CNSPC, Wuxi, Jiangsu 214151 3. Research Institute of Geology, East China Bureau of Petroleum Geology, CNSPC, Yangzhou, Jiangsu 225002 4. Laboratory of Hubei Hydrometric Party, Jing zhou, Hubei 434100

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 forming mechanism of diadamantane,the thermal evolution relation among isomers as well as the actual GC-MS detection results of diadamantane-type compounds in the saturated hydrocarbon components of T-J source rock from the Shuanghu area of Tibet,five diadamantane indexes are put forward.By correlation analysis with RO,it is suggested that methyldiadamantane index(MDII) can be applied as a new maturity parameter for source rock.On the basis of thermal modeling experiments with the lignite (RO=0.46%) from Baise,Guangxi,the thermal evolution rules of MDII are discussed.MDII has good positive correlation with RO,and their correlation coefficient is 0.83.As the index for the thermal maturity of organic matter,MDII is applied within the limits of mature and high mature stages.

https://doi.org/10.11781/sysydz199804411