Previous researchers have shown that the Katz–Thompson theory is useful in predicting permeability of sedimentary rock from mercury intrusion porosimetry data. In this paper, the variations in pore characteristics of sandstone and limestone in the temperature range of 25 °C–600 °C are studied based on mercury injection test and the permeability evolution is also analyzed. The results show that the permeability of sandstone fluctuates and can be described as a small fluctuation from 25 °C to 400 °C, followed by a gradual increase from 400 °C to 570 °C and then a rapid increase from 570 °C to 600 °C. The permeability of limestone is almost constant from 25 °C to 400 °C and is rapidly increased from 400 °C to 600 °C. There is a critical temperature threshold that is 570 °C and 400 °C for sandstone and limestone respectively, and the critical pore diameter increases rapidly when this threshold is exceeded. The permeability increases rapidly at temperature up to a critical threshold. The volume percentage of big holes (1 μm < Φ < 10 μm) plays a decisive role in the permeability evolution of sandstone and the volume percentage of larger holes (Φ > 10 μm) plays a decisive role in the permeability evolution of limestone. These findings offer helpful suggestions on the estimation and analysis of rock permeability.

先前的研究人员表明，Katz-Thompson理论可用于通过压汞法测井数据预测沉积岩的渗透率。本文探讨了砂岩和石灰岩孔隙特征的变化通过注汞试验研究了在25°C–600°C温度范围内的温度，并分析了渗透率的演变。结果表明，砂岩的渗透率是波动的，可以描述为从25°C到400°C的小波动，然后从400°C逐渐增加到570°C，然后从570°C迅速增加到600 ℃。石灰石的渗透率从25°C到400°C几乎恒定，并且从400°C到600°C迅速增加。砂岩和石灰石的临界温度阈值分别为570°C和400°C，并且超过该阈值时，临界孔径会迅速增加。渗透率在温度达到临界阈值时迅速增加。大孔的体积百分比（1μm<Φ< 10μm）在砂岩渗透性演化中起决定性作用，大孔的体积百分比（Φ> 10μm）在石灰石渗透性演化中起决定性作用。这些发现为岩石渗透率的估计和分析提供了有益的建议。