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Evaluating the potential of surface-modified silica nanoparticles using internal olefin sulfonate for enhanced oil recovery

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Petroleum Science 2020年第3期17卷 722-733页

作者： Afaque Ahmed Ismail Mohd Saaid Abdelazim Abbas Ahmed Rashidah M.Pilus Mirza Khurram Baig Petroleum Engineering Department Universiti Teknologi PETRONASSeri IskandarMalaysia Center of Research in Enhanced Oil Recovery Universiti Teknologi PETRONASSeri IskandarMalaysia Department of Physics University of OkaraOkaraPunjabPakistan

Recently,nanoparticles have proven to enhance oil recovery on the core-flood scale in challenging high-pressure high-temperature *** generally appear to improve oil production through wettability alteration and reduction in interfacial tension between oil and water ***,they are environmentally friendly and cost-effective enhanced oil recovery *** the rheological properties of nanoparticles is critical for field *** instability of nanoparticle dispersion due to aggregation is considered as an unfavorable phenomenon in nanofluid flooding while conducting an EOR *** this study,wettability behavior and rheological properties of surface-treated silica nanoparticles using internal olefins sulfonates(IOS20–24 and IOS19–23),anionic surfactants were *** modification effect on the stability of the colloidal solution in porous media and oil recovery was *** rheology of pure and surfacetreated silica nanoparticles was investigated using a HPHT *** and particle size distributions of pure and coated silica nanoparticles were studied using a field emission scanning electron microscope.A series of core-flood runs was conducted to evaluate the oil recovery *** coated silica nanoparticles were found to alter rheological properties and exhibited a shear-thinning behavior as the stability of the coated silica nanoparticles could be improved *** low shear rates,the viscosity slightly increases,and the opposite happens at higher shear ***,the surfacemodified silica nanoparticles were found to alter the wettability of the aqueous phase into strongly water-wet by changing the contact angle from 80°to 3°measured against glass slides representing sandstone ***–water IFT results showed that the surface treatment by surfactant lowered the oil–water IFT by 30%.Also,the viscosity of brine increased from 0.001 to 0.008 Pa s by introducing SiO2 nano

关键词： Silica nanoparticles Anionic surfactant rheological properties of nano fluids Wettability alteration Enhanced oil recovery

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