caa a22 4500 606197672 CHVBK 20210128100930.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00348-015-2025-4 doi (NATIONALLICENCE)springer-10.1007/s00348-015-2025-4 Minimum miscibility pressure estimation for a CO2/n-decane system in porous media by X-ray CT [Elektronische Daten] [Yu Liu, Lanlan Jiang, Lingyue Tang, Yongchen Song, Jiafei Zhao, Yi Zhang, Dayong Wang, Mingjun Yang] Accurate determination of gas-fluid miscibility conditions is important to optimize the displacement efficiency during CO2-enhanced oil recovery. This paper presents a new technique to investigate the phase behavior and to estimate the minimum miscibility pressure (MMP) of a CO2/n-decane system using an X-ray computerized tomography (CT) scanner. CT scans of the CO2/n-decane system are taken at various pressures during the experiments. The image intensity values taken from the CT images have a linear relationship with the densities of the measured objects; therefore, we can estimate the miscible point of CO2 and n-decane because the difference between the intensity values for each phase decays to zero as the pressure increases toward the MMP. This paper provides experimental evidence for the validity of the new CT method by comparing the results with previous studies and presents an application of the method to investigate the MMP of the CO2/n-decane system in porous media. Additionally, the influence of porous media on the equilibrium state when the CO2/n-decane system is close to miscibility is discussed. Springer-Verlag Berlin Heidelberg, 2015 Liu Yu Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut Jiang Lanlan Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut Tang Lingyue Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut Song Yongchen Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut Zhao Jiafei Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut Zhang Yi Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut Wang Dayong Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut Yang Mingjun Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut Experiments in Fluids Springer Berlin Heidelberg 56/7(2015-07-01), 1-9 0723-4864 56:7<1 2015 56 348 https://doi.org/10.1007/s00348-015-2025-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-2025-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Yu Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Jiang Lanlan Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Tang Lingyue Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Song Yongchen Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Zhao Jiafei Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Zhang Yi Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Wang Dayong Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Yang Mingjun Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/7(2015-07-01), 1-9 0723-4864 56:7<1 2015 56 348