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http://dx.doi.org/10.9719/EEG.2018.51.3.223

The Effect of Temperature on the Process of Immiscible Displacement in Pore Network  

Park, Gyuryeong (Department of Energy Resources Engineering, Pukyong National University)
Kim, Seon-ok (Department of Energy Resources Engineering, Pukyong National University)
Lee, Minhee (Department of Earth Environmental Sciences, Pukyong National University)
Wang, Sookyun (Department of Energy Resources Engineering, Pukyong National University)
Publication Information
Economic and Environmental Geology / v.51, no.3, 2018 , pp. 223-232 More about this Journal
Abstract
The viscous force of fluids and the capillary force acting on the pore network of the porous media are important factors determining the immiscible displacement during geological $CO_2$ sequestration, these were directly affected by geological formation conditions and injection conditions. This study aimed to observe the migration and distribution of injected fluid and pore water, and quantitatively investigate displacement efficiency on various injection temperatures. This study aimed to perform micromodel experiments by applying n-hexane used as a proxy fluid for supercritical $CO_2$. In this study, immiscible displacement process from beginning of n-hexane injection to equilibrium of the distribution of the n-hexane and pore water was observed. The images from experiment were used to observe the displacement pattern and estimate the areal displacment efficiency of the n-hexane. For investigate the affects of the injection temperatures on the migration in macroscopic, migration of n-hexane in single pore was analyzed. The measurement revealed that the displacement efficiency at equilibrium state decreases as the temperature increases. The result from experiments indicate that the temperatures can affect the displacement pattern by changing the viscous forces and the capillary forces. The experimental results could provide important fundamental information on reservoir conditions and fluid injection conditions during geological $CO_2$ sequestration.
Keywords
geological $CO_2$ sequestration; immiscible displacement; temperature; micromodel; displacement efficiency;
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