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按照干酪根热降解模型,本文通过在实验室条件下测的不同类型生油岩热降解数据和各模拟温度下测的镜质体反射率值,以及各类型生油岩的最大累积生油率值与干酪根类型指数关系等资料,编制了表明生油率与模拟温度和埋藏深度关系的生油量计算图版。在此图版上,根据辽河断陷西部凹陷各层生油岩中干酪根的平均类型指数,进一步确定出各生油层的累积生油率曲线,并结合有关地球化学参数分别计算各层生油岩在整个热演化过程中所生成的生油量。本文所论述的生油量计算方法,原则上也适用于经历不同发育阶段的任何生油岩体的定量评价。
According to the thermal degradation model of kerogen, the thermal degradation data of different types of source rock measured under laboratory conditions and the vitrinite reflectance values measured at each simulated temperature, as well as the maximum cumulative oil production rate of various types of source rocks Value and kerogen type exponential relationship and other data, prepared to show the oil yield and simulated temperature and burial depth of the relationship between the calculation of oil production plate. On this plate, according to the average type index of kerogen in various layers of oil source rocks in the western sag of Liaohe Fault Depression, the cumulative oil yield curve of each oil layer is further determined, and the corresponding geochemical parameters are used to calculate the oil source rocks The amount of oil generated during the entire thermal evolution. The method of calculating the amount of oil produced in this paper is also applicable in principle to the quantitative evaluation of any oil-bearing rock mass undergoing various stages of development.