Abstract: A systematic artificial simulative experiment of mature evolution was carried out with a piece of immature source rock from Naopocao No, 13-15 at Dongying seg. The sample underwent the treatment in an autoclave without chloroform extract.By using the reflectivity of the vitrite as a scale, experimental data can be converted into the corresponding formation depth of this area.As compared with the section of natural evolution, they appear very similar. The zones of petroleum generation can be divided by means of simulative experiment of the nature evolution process of artificial organic matters. ES_3-4low mature oil generation zones at Dongying seg are 2200-3020 m deep, whereas mature zones 3020-3980 m.This is the highest stage with respect to oil generation.High mature zones are 3980-4950 m.The total depth of petroleum generation is 2750 m.In the depth over 4950 m, condensed oil and wet gas are expected to be found. By means of the heat pressure simulative experiment, we can obtain the oil generation amount at each evolution stage of different kinds of immature source rock,and subsequently, we can make drawings of oil generation amount of different organic facies.So long as we measure the reflectivity value of vitrite of kerogen of source rock at different depths of the stratum in pre-measured area and work out the diagram of the relationship between the reflectivity and the depth of vitrite in the study region, we shall be able to select the appropriate drawing of the amount of oil generation amount of a proper organic facies and find out the amount.