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dc.contributor.authorChen, Y.
dc.contributor.authorSari, A.
dc.contributor.authorXie, Sam
dc.contributor.authorBrady, P.
dc.contributor.authorHossain, Mofazzal
dc.contributor.authorSaeedi, Ali
dc.identifier.citationChen, Y. and Sari, A. and Xie, S. and Brady, P. and Hossain, M. and Saeedi, A. 2018. Electrostatic Origins of CO2-Increased Hydrophilicity in Carbonate Reservoirs. Scientific Reports. 8 (1): Article ID 17691.

Injecting CO2 into oil reservoirs appears to be cost-effective and environmentally friendly due to decreasing the use of chemicals and cutting back on the greenhouse gas emission released. However, there is a pressing need for new algorithms to characterize oil/brine/rock system wettability, thus better predict and manage CO2 geological storage and enhanced oil recovery in oil reservoirs. We coupled surface complexation/CO2 and calcite dissolution model, and accurately predicted measured oil-on-calcite contact angles in NaCl and CaCl2 solutions with and without CO2. Contact angles decreased in carbonated water indicating increased hydrophilicity under carbonation. Lowered salinity increased hydrophilicity as did Ca2+. Hydrophilicity correlates with independently calculated oil-calcite electrostatic bridging. The link between the two may be used to better implement CO2 EOR in fields.

dc.publisherNature Publishing Group
dc.titleElectrostatic Origins of CO2-Increased Hydrophilicity in Carbonate Reservoirs
dc.typeJournal Article
dcterms.source.titleScientific Reports
curtin.departmentWASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
curtin.accessStatusOpen access

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