Abstract:Its exploration potential is not jet clear of DeHui fault depression ,which is in the southern Songliao Basin. Based on the hydrocarbon-generation thermal simulation experiment, using the chemical kinetics method,to evaluate quantitative evaluation on the deep source rocks of study area. The research indicates that the region Yingcheng and Shahezi formation has total gas volume of 11.1 ?1012m3.From the result, DeHui fault depression is considered as higher exploration potential,and become important depression of Songliao basin.