Modelling biofilm growth in the presence of carbon dioxide and water flow in the subsurface |
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| Authors: | Anozie Ebigbo Rainer Helmig Alfred B Cunningham Holger Class Robin Gerlach |
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| Institution: | 1. Department of Hydromechanics and Modelling of Hydrosystems, Universität Stuttgart, Pfaffenwaldring 61, 70569 Stuttgart, Germany;2. Center for Biofilm Engineering, Montana State University, Bozeman, MT 59717, USA |
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| Abstract: | The concentration of greenhouse gases – particularly carbon dioxide (CO2) – in the atmosphere has been on the rise in the past decades. One of the methods which have been proposed to help reduce anthropogenic CO2 emissions is the capture of CO2from large, stationary point sources and storage in deep geological formations. The caprock is an impermeable geological layer which prevents the leakage of stored CO2, and its integrity is of utmost importance for storage security. Due to the high pressure build-up during injection, the caprock in the vicinity of the well is particularly at risk of fracturing. Biofilms could be used as biobarriers which help prevent the leakage of CO2 through the caprock in injection well vicinity by blocking leakage pathways. The biofilm could also protect well cement from corrosion by CO2-rich brine. |
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| Keywords: | Biofilm growth CO2 storage Leakage |
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