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- W4366124469 abstract "Abstract Gas breakthrough pressure is a key parameter to evaluate the sealing capacity of caprock, and it also plays important roles in safety and capacity of CO 2 geological storage. Based on the published experimental results, we present numerical simulations on CO 2 breakthrough pressure in unsaturated low‐permeability rock under 9 multiple P‐T conditions (which can keep CO 2 in gaseous, liquid and supercritical states) and thus, a numerical method which can be used to accurately predict CO 2 breakthrough pressure on rock‐core scale is proposed. The simulation results show that CO 2 breakthrough pressure and breakthrough time are exponential correlated with P‐T conditions. Meanwhile, pressure has stronger effects on experimental results than that of temperature. Moreover, we performed sensitivity studies on the pore distribution index λ (0.6, 0.7, 0.8, and 0.9) in van Genuchten‐Muale model. Results show that with the increase of λ , CO 2 breakthrough pressure and breakthrough time both show decreasing trends. In other words, the larger the value of λ is, the better the permeability of the caprock is, and the worse the CO 2 sealing capacity is. The numerical method established in this study can provide an important reference for the prediction of gas breakthrough pressure on rock‐core scale and for related numerical studies." @default.
- W4366124469 created "2023-04-19" @default.
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- W4366124469 date "2023-06-01" @default.
- W4366124469 modified "2023-10-17" @default.
- W4366124469 title "A Numerical Simulation Study of Temperature and Pressure Effects on the Breakthrough Pressure of CO<sub>2</sub> in Unsaturated Low‐permeability Rock Core" @default.
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- W4366124469 doi "https://doi.org/10.1111/1755-6724.15061" @default.
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