The paper presents the results of thermodynamic modeling of a transformation of a kerogen-bearing sedimentary rock within the temperature range of 50–400°С at a gradually increasing pressure from 300 to 2200 bar. A gradual increase in temperature and pressure, starting from 50°С, leads to the formation of the lighter and more oxidized type of kerogen. The methane–carbon dioxide gas phase is present in the entire range of specified temperatures and pressures. The coexistence of kerogen and oil was obtained only in one calculation for 325°С and 1750 bar. In the presence of kerogen in the system, the oil consists of 92% alkane hydrocarbons. With a further increase in temperature, the kerogen disappears and a share of aromatic hydrocarbons in oil rises to 49–77%.

中文翻译：

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高有机质岩石的后生转化热力学模型

本文介绍了含干酪根沉积岩在 50-400°С 温度范围内，压力从 300 到 2200 巴逐渐增加的热力学模拟结果。从 50°С 开始，温度和压力逐渐升高，导致形成更轻和更氧化类型的干酪根。甲烷-二氧化碳气相存在于指定温度和压力的整个范围内。干酪根和石油的共存仅在 325°С 和 1750 bar 的一次计算中获得。在系统中存在干酪根的情况下，油由 92% 的烷烃组成。随着温度的进一步升高，干酪根消失，石油中芳烃的比例上升到 49-77%。