کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8091384 | 1521996 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pore-scale observations of supercritical CO2 drainage in Bentheimer sandstone by synchrotron x-ray imaging
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
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 = 10â8.6 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Greenhouse Gas Control - Volume 25, June 2014, Pages 93-101
Journal: International Journal of Greenhouse Gas Control - Volume 25, June 2014, Pages 93-101
نویسندگان
Anna L. Herring, Linnéa Andersson, D.L. Newell, J.W. Carey, Dorthe Wildenschild,