Behavior of CO2/water flow in porous media for CO2 geological storage |
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| Affiliation: | 1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, Liaoning 116024, China;2. Research Institute of Innovative Technology for the Earth, Kizugawa City, Kyoto 619-0292, Japan;3. Department of Energy Sciences, Tokyo Institute Technology, Nagatsuta, Yokohama 226-8502, Japan;1. Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA;2. Magnetic Resonance Spectroscopy Core Facility, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, USA;1. Department of Radiology, Beijing Youan Hospital, Capital Medical University, No. 8, Xi Tou Tiao, You An Men Wai, Feng Tai District, Beijing 100069, China;2. School of Biomedical Engineering, Capital Medical University, No. 10, Xi Tou Tiao, You An Men Wai, Feng Tai District, Beijing 100069, China;1. Department of Radiology, University of Wisconsin-Madison, Madison, WI, USA;2. Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Germany;3. Clinic of Radiology and Nuclear Medicine, Basel University Hospital, Basel, Switzerland;4. Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA;5. Department of Medical Physics, University of Wisconsin-Madison, Madison, WI, USA;6. Pathology Clinic, University of Wisconsin-Madison, Madison, WI, USA;7. Department of Medicine, University of Wisconsin-Madison, Madison, WI, USA;8. Department of Emergency Medicine, University of Wisconsin-Madison, Madison, WI, USA;9. Department of Surgery, University of Wisconsin-Madison, Madison, WI, USA;1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 100083, China;2. Earth and Environmental Sciences, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA CA94720, USA;3. Energy and Environment Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MSIN K8-96, Richland, WA 99352, USA;4. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MSIN K8-96, Richland, WA 99352, USA.;1. Department of Radiology, Boston University School of Medicine, Boston, MA 02118, USA;2. Department of Radiology, Masschusetts General Hospital, Boston, MA 02118, USA;3. Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, MA 02118, USA |
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| Abstract: | ![]()
A clear understanding of two-phase fluid flow properties in porous media is of importance to CO2 geological storage. The study visually measured the immiscible and miscible displacement of water by CO2 using MRI (magnetic resonance imaging), and investigated the factor influencing the displacement process in porous media which were filled with quartz glass beads. For immiscible displacement at slow flow rates, the MR signal intensity of images increased because of CO2 dissolution; before the dissolution phenomenon became inconspicuous at flow rate of 0.8 mL min− 1. For miscible displacement, the MR signal intensity decreased gradually independent of flow rates, because supercritical CO2 and water became miscible in the beginning of CO2 injection. CO2 channeling or fingering phenomena were more obviously observed with lower permeable porous media. Capillary force decreases with increasing particle size, which would increase permeability and allow CO2 and water to invade into small pore spaces more easily. The study also showed CO2 flow patterns were dominated by dimensionless capillary number, changing from capillary finger to stable flow. The relative permeability curve was calculated using Brooks-Corey model, while the results showed the relative permeability of CO2 slightly decreases with the increase of capillary number. |
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