کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8090882 | 1521984 | 2015 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Salt precipitation and CO2/brine flow distribution under different injection well completions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
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چکیده انگلیسی
Carbon capture and sequestration is a viable technology to reduce the concentration of CO2 emitted to the atmosphere. Salt precipitation due to dry-supercritical CO2 causes a reduction of permeability, having adverse effects on well injectivity and pressure build-up. This study evaluated the salt precipitation, brine flux patterns, and pressure build-up for two well constructions, (1) partially perforated (4 injection intervals) and (2) fully perforated throughout the target formation. Both well designs showed non-localized salt precipitation in low-k formations (5Â ÃÂ 10â15 and 50Â ÃÂ 10â15Â m2) and localized precipitation in high-k (250Â ÃÂ 10â15 and 500Â ÃÂ 10â15Â m2). It was also found that two distinct brine flux patterns occurred; under low-k conditions the brine flux was outward and parallel to CO2 migration and precipitation became limited. While under high-k conditions there developed back-flow of the brine which amplified salt precipitation. When this process occurred, the permeability reduction was orders of magnitude greater than when non-localized salt precipitation occurred. This reduction resulted in pressure build-up near the well in regions of the reservoir in which it occurred. Optimal injection conditions were found to be in reservoirs of mid-range permeability; which allowed for adequate pressure dissipation and minimized salt precipitation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Greenhouse Gas Control - Volume 37, June 2015, Pages 299-310
Journal: International Journal of Greenhouse Gas Control - Volume 37, June 2015, Pages 299-310
نویسندگان
Ethan Guyant, Weon Shik Han, Kue-Young Kim, Myong-Ho Park, Byoung-Yeop Kim,