摘要：In this paper, we conducted hydrocarbon generation experiments and analysis on coal measure source rocks (low rank coal, R_o is distributed in the range of 0.57-0.86%). The results show that when coal rock is in the early stage of thermal evolution (250-350°C, equivalent to R_o distribution in 0.55%-1.2%), oil (C_(5+)) and wet gas (C_2-C_5) are mainly formed, and the peak of oil production occurs between 0.8% and 0.9% of R_o. When the temperature reaches 450°C (R_o =1.25%), the oil production basically stops; the peak of wet gas production (C_2-C_5) appears at 350-400°C (R_o between 0.75-1.25%). The wet gas production rapidly decreases after 450°C. Coal measure source rocks have a wide range of gas- producing window, with gaseous hydrocarbons producing from R_o =0.55% to 3.5%. The peak of melane production occurs after 450°C (R_o =1.25%)， and there is a sharp increase in methane during the 400-500°C period.
关键词：Coal measure source rock;hydrocarbon generation model;thermal evolution;gas-producing window;peak of methane production
