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• W2947521012 abstract "Recently, polymer-coated nanoparticles were proposed for enhanced oil recovery (EOR) due to their improved properties such as solubility, stability, stabilization of emulsions and low particle retention on the rock surface. This work investigated the potential of various polymer-coated silica nanoparticles (PSiNPs) as additives to the injection seawater for oil recovery. Secondary and tertiary core flooding experiments were carried out with neutral-wet Berea sandstone at ambient conditions. Oil recovery parameters of nanoparticles such as interfacial tension (IFT) reduction, wettability alteration and log-jamming effect were investigated. Crude oil from the North Sea field was used. The concentrated solutions of PSiNPs were diluted to 0.1 wt % in synthetic seawater. Experimental results show that PSiNPs can improve water flood oil recovery efficiency. Secondary recoveries of nanofluid ranged from 60% to 72% of original oil in place (OOIP) compared to 56% OOIP achieved by reference water flood. In tertiary recovery mode, the incremental oil recovery varied from 2.6% to 5.2% OOIP. The IFT between oil and water was reduced in the presence of PSiNPs from 10.6 to 2.5–6.8 mN/m, which had minor effect on EOR. Permeability measurements indicated negligible particle retention within the core, consistent with the low differential pressure observed throughout nanofluid flooding. Amott–Harvey tests indicated wettability alteration from neutral- to water-wet condition. The overall findings suggest that PSiNPs have more potential as secondary EOR agents than tertiary agents, and the main recovery mechanism was found to be wettability alteration." @default.
• W2947521012 created "2019-06-07" @default.
• W2947521012 creator A5014204795 @default.
• W2947521012 creator A5018622476 @default.
• W2947521012 creator A5019078714 @default.
• W2947521012 date "2019-05-31" @default.
• W2947521012 modified "2023-10-18" @default.
• W2947521012 title "Experimental Investigation of Polymer-Coated Silica Nanoparticles for Enhanced Oil Recovery" @default.
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• W2947521012 doi "https://doi.org/10.3390/nano9060822" @default.
• W2947521012 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6630309" @default.
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• W2947521012 hasPublicationYear "2019" @default.
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