不同类型干酪根热解生烃动力学研究(一)

STUDY ON KINETICS OF HYDROCARBON FORMING PYROLYSIS OF DIFFERENT KINDS OF KEROGENS(2)

采用岩石评价仪对不同类型未成熟干酪根的热解生烃动力学特征进行了研究,分析了所得出的热解反应生烃率-温度和反应速率-温度曲线及其特征值。研究结果表明,不同类型干酪根具有不同的热解生烃动力学特征,三种类型干酪根的主要生烃阶段的温度范围(△T)不同,其规律是Ⅲ类干酪根的温度范围大于Ⅱ类干酪根,Ⅱ类干酪根又大于Ⅰ类。同一试样在不同升温速率的实验中,其最大反应速率点对应于相同的生烃率。

The study on kinetics of hydrocarbon-forming pyrolysis ofdifferent kinds of kerogens were conducted with Rock-Eval Apparatus. The plots of the hydrocarbon evolution versus temperature and the reaction rate versus temperature and the characteristic values were discussed. The results show that the pyrolysis kinetic characteristics of various kinds of kerogens are different. The temperature ranges (△T) of the main stage of the hydrocarbon-forming reaction of three types of kerogens are in the order of △TⅡ> △Ⅰ△TI In the experiments on the same samples, the hydrocarbon evolution fractions at maximum reaction rates with different heat-up rates are nearly the same.