چكيده به لاتين
One of the important factors in enhanced oil recovery, which increases the efficiency of the reservoirs, is the reduction of interfacial tension. Reducing interfacial tensions can lead to better oil flow in the reservoirs. The effect of nickel oxide (NiO) nanoparticles based on silica as nano substrate, on reduction of interfacial tension (IFT) and surface tension (S.T) was investigated for enhanced oil recovery (EOR) for a Heavy oil of Soroush field with density of 0.965 g/cm3 and viscosity of 1310 cP in ambient temperature was used in this work. Thus, different weight percentages of NiO and SiO2 nanoparticles (NPs) were synthesized and injected into Soroush heavy oil and their effects on interfacial tension were considered and determined. NiO/SiO2 nanocomposites was synthesized by co-precipitation-hydrothermal method and also silica and NiO NPs were fabricated by sol-gel-hydrothermal process. On the other hand, the important factors such as pH, concentration and Aging time were investigated on the reduction of IFT measured by du Noüy ring method (Sigma 701 model). Also in this study, the NiO/SiO2 nanofluids is compared with NiO and SiO2 nanofluids. In addition, water and oil interfacial tension was measured to be 29.02 mN/m as reference without using nanoparticles. Furthermore, 15 ml nanofluid of 30 wt% NiO/SiO2 nanocomposite was dissolved in 30 ml of distilled water and its corresponding IFT was recorded to be 1.28 mN/m. Whereas, the IFT of 15 ml nanofluid of 28 wt% Fe/NiO/SiO2 as new nanocomposite dissolved in the same amount of water was determined to be less than 1 mN/m. Therefore, it was shown that iron oxide NPs can be the best activator for high surface energy NiO/SiO2 nanocomposites. Thus, it was tried to produce novel hydrophilic and eco-friendly nanofluids by performing surface modifications through the organosiloxane and PEG polymer, because the hydrophilic energetic surface of nanoparticles with high effective surface area (BET) are able to wettability alteration and IFT that are very important factors in EOR recovery technique.
