Abstract: Based on relationships between the apparent activation energy (AAE) and hydrocarben generating rate,the frequency factor and AAE,which were derived from pyrolysis analysis of immature source rocks in the study area,a model of chemical reaction kinetics (MCRK) was established.MCRK can be used to calculating hydrocarbon generating rate and the generation amount at random depth and generating intensity in random intervals of source rocks.By using this model,the current cumulative oil generating intensity and amount for immature source rocks of Qianjiang formation were calculated in JJ,QQ,XX Depressions,the Jianghan Basin.It showed that MCRK is suitable for calculation of oil generating quantity as comparing with other methods.