Pore-scale observations of supercritical CO₂ drainage in Bentheimer sandstone by synchrotron x-ray imaging Public Deposited

http://ir.library.oregonstate.edu/concern/articles/x920fz56n

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  • Pore-scale observations of supercritical CO2 drainage in Bentheimer sandstone by synchrotron x-ray imaging
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  • This work utilizes synchrotron-based x-ray computed microtomography (x-ray CMT) imaging to quantify the volume and topology of supercritical carbon dioxide (scCO₂) on a pore-scale basis throughout the primary drainage process of a 6 mm diameter Bentheimer sandstone core. Experiments were performed with brine and scCO₂ at 8.3 MPa (1200 psi) and 37.5°C. Capillary pressure–saturation curves for the scCO₂-brine system are presented and compared to the ambient air-brine system, and are shown to overlay one another when pressure is normalized by interfacial tension. Results are analyzed from images with a voxel resolution of 4.65 μm; image-based evidence demonstrates that scCO₂ invades the pore space in a capillary fingering regime at a mobility ratio M = 0.03 and capillary number Ca = 10[superscript −8.6] to an end-of-drainage brine saturation of 9%. We provide evidence of the applicability of previous two-dimensional micromodel studies and ambient condition experiments in predicting flow regimes occurring during scCO₂ injection.
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  • Herring, A. L., Andersson, L., Newell, D. L., Carey, J. W., & Wildenschild, D. (2014). Pore-scale observations of supercritical CO₂ drainage in Bentheimer sandstone by synchrotron x-ray imaging. International Journal of Greenhouse Gas Control, 25, 93-101. doi:10.1016/j.ijggc.2014.04.003
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  • description.provenance : Made available in DSpace on 2014-08-11T17:40:37Z (GMT). No. of bitstreams: 1 HerringAnnaCBEEPore-ScaleObservations.pdf: 2544658 bytes, checksum: 0848012ed3952986d53df2be72058d4a (MD5) Previous issue date: 2014-06
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