华北晚古生代煤二次生烃的动力学模式

通过对不同成熟度煤样（０．５３－２．１１％）的动力学研究，展示了华北晚古生代煤动力学参数随成熟度由高而低，从低到高的动态演化规律，提出了煤的二次生烃动力学模式，依据该模式，华北晚古生代煤的二次生烃具有一定的阶段性，不同的演化阶段其二次生烃模式不同，初镒生烃以后，当煤的镜质组反射率为０．７－０．９％时，二次生烃高峰提前；若反射率为０．９－１．３％时，二次生烃高峰滞后，而反射率〉１．３％以后，二次生

KINETIC MODEL OF HYDROCARBON RE-GENERATION FROM LATE PALEOZOIC COAL, NORTH CHINA

The research on the kinetics of coal samples from 0.53% to 2.11% of R o collected from coal_bearing formations in Late Paleozoic sequence, North China, shows that kinetics parameters vary from high to low, and then to high again with maturation. The kinetic models are proposed in this paper. It is believed that stages of hydrocarbon re_generation from coal exist in North China, and the models are different from stage to stage. After primary hydrocarbon generation, if the vitrinite reflectance is about 0.7%-0.9%, the re_generation peak will come in advance. When the reflectance is between 0.9% and 1.3%, the re_generation peak will be delayed. When the reflectance is higher than 1.3%, the re_generation peak will be the same as that of the initial generation.