中国东部某些含油气盆地大部是以下第三系始—渐新统为生油层系,它们的地质条件和沉积环境有利于有机物的保存和向石油转化。根据干酪根热解生油理论所导出的生油模拟数学公式,编制了ALGOL—60语言的计算机程序,并对上述各盆地进行了计算。根据电算结果对这些盆地下第三系生油岩的演化进行了概略的分析和探讨,初步归纳了下第三系生油岩具有成熟早、门限值高、 Most of the eastern petroliferous basins in China are the following Tertiary-Oligocene petroleum systems. Their geological conditions and sedimentary environment are favorable for the preservation and conversion of organic matter. According to the mathematical model of oil generation derived from the kerogen pyrolysis oil theory, a computer program of ALGOL-60 language was compiled and the above basins were calculated. According to the calculation results, the evolution of the third member source rocks in these basins is analyzed and discussed briefly. It is concluded that the Lower Tertiary oil source rocks have mature early, high threshold,