煤系热解参数及其与有机碳的相关性

THE PYROLYSIS PARAMETERS AND THEIR CORRELATION WITHTHE ORGANIC CARBON IN COALBEARING STRATA

通过对煤系热解参数之间及其与有机碳含量的研究，分析了煤系热解参数与有机碳的关系，认为煤系热解参数及有机碳含量变化范围均较宽，不同热解参数之间具有一定的相关性。Ｓ１、Ｓ２和Ｓ１＋Ｓ２与有机碳具正相关关系，基本可以用于评价有机质丰度。热解类型指数Ｓ２／Ｓ３、氢指数、氧指数和Ｓ３明显地受有机碳的影响，尤其Ｓ２／Ｓ３受到的影响更为明显，这样就影响有机质类型的评价。给出了各参数间的相关关系式，这对于煤系烃源岩的生烃定量评价具有一定参考价值。

Based on the study of the pyrolysis (Rockeval) parameters and their correlation with the organic carbon content in coalbearing strata,the relationships among the pyrolysis parameters and organic carbon are analyzed.It is considered that the pyrolysis parameters and organic carbon content have the wider variation ranges,and there are some correlation among the different pyrolysis parameters.The positive correlation among S1,SZ2 and S1+S 2 with the organic carbon could be used basically to evaluate the abundance of organic matter.The indexes of pyolysis type, S2/S 3,hydrogen,oxygen and S 3 are obviously under the influence of the organic carbon,especially,the S2/S3TBZ index,thus,the evaluation of the organic matter type is influenced also.The correlation given in this paper have certain reference value for the quantitative hydrocarbongenerated evaluation of source rocks in coalbearing strata.