期刊
12TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, GHGT-12
卷 63, 期 -, 页码 3051-3059出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.egypro.2014.11.328
关键词
permeability reduction; sandstone; CO2-saturated brine; live brine; supercritical CO2; injectivity decrease
We measured the change in permeability of two selected sandstones (Berea, Fonteinebleau) due to injection of CO2-saturated (live) brine, unsaturated (dead) brine or supercritical (sc) CO2 at reservoir conditions. We found that the permeability did not significantly change in a clean sandstone consisting of pure quartz (Fonteinemebleau) due to live or dead brine injection, although permeability changed due to scCO(2) injection by similar to 23%. The permeability in the Berea sandstone, however, changed due to live or dead brine injection, by up to 35%; this permeability reduction in Berea sandstone was likely caused by fines release and subsequent pore throat plugging as the damage was more significant at higher injection rates. We expect that this phenomenon -i.e. rock permeability reduction due to CO2 injection into the formation - can have a significant and detrimental influence on CO2 injectivity, which would be reduced accordingly. (C) 2014 The Authors. Published by Elsevier Ltd.
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