Permeability evolution of two sedimentary rocks at different temperatures based on the Katz-Thompson theory

• Published in: International journal of rock mechanics and mining sciences (Oxford, England : 1997) England : 1997), 2021-08, Vol.144, p.104819, Article 104819
• Main Authors: Lyu, Chao, Hao, Shuqing, Sun, Qiang, Zhang, Weiqiang, Geng, Jishi
• Format: Article
• Language: English
• Subjects: Critical temperature; Evolution; Fruits; Katz–thompson model; Limestone; Membrane permeability; Mercury; MIP; Permeability; Porosity; Sandstone; Sedimentary rock; Sedimentary rocks; Stone
• ISSN: 1365-1609; 1873-4545
• DOI: 10.1016/j.ijrmms.2021.104819

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