DIFFERENTIAL STUDY ON VITRINITE REFLECTANCE OF MACERALS FROM COAL AND KEROGENS OF DIFFERENT HOST ROCKS
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摘要: 主岩岩相对其中的有机碎屑的镜质组反射率的影响,是应用上的一个重要问题。我们在淮北矿区对石炭二叠纪含煤地层中的煤和几种主要岩石中的干酪根作了反射率测定,同时对分散有机质镜质组反射率数据处理和取值的方法作了具体的研究。结果表明,与同层位煤的镜质组反射率相比,泥岩、砂岩和灰岩的镜质组反射率的变化幅度分别为+6—-10%、-1—-16%和+4—-14%。另外,从某种意义上说,对分散有机质而言,反射率数据处理与取值的方法比反射率测量本身更为重要。Abstract: The influence of hostrock petrofacies on vitrinite reflectance for organic elastics is an important problem in the study of thermal evolution of organics. The coal in coal-bearing strata and kerogens in several dominant rocks of Carboniferous-Permian in Huaibei (north Anhui) were measured for vitrinite reflectance, moreover the methods of data process and value determination for vitrinite reflectance of despcrsed organics were also studied. The results show that the vitrinite refleetance in kerogen from mudstone, sandstone, limestone differ from that of coal in the same horizon by +6 — -10%,-1 — -16% and +4 — -14%, respectively, which means that the data process and value determination for vitrinite reflectance are more important than the reflectance determination itself.
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