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چکیده
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Asphaltene (ASP) instability poses a significant threat to flow assurance and reservoir productivity. This study introduces a novel and cost-effective nanofluid specifically engineered to mitigate asphaltene-related challenges in crude oil systems. In this regard, a novel engineered low- salinity water has been used in the nanofluid structure. Generally, for the first time, this nanofluid is used to investigate asphaltene precipitation and Enhanced oil recovery (EOR). In this study, BET and other analyses (TEM, FT-IR, XRD, and TGA) were conducted on the synthetic compound. Also, validation tests were conducted to examine asphaltene deposition, zeta potential, electrical conductivity, interfacial tension (IFT), contact angle, and core flooding tests. BET analysis revealed a high specific surface area of 170.123 m2/g. The performance of the nanofluid was evaluated through optical microscopy and n-heptane titration experiments. Results demonstrated that a low concentration of 50 ppm of the novel nanofluid significantly delayed the asphaltene onset point (AOP). Furthermore, the average size of asphaltene aggregates post-onset was reduced. The new nanofluid composition dramatically altered the surface properties as interfacial tension dropped from 18.97 to 0.98 mN/m, and the contact angle reduced from 142° to 16.5°. TGA data revealed an high adsorption efficiency, with the nanofluid sequestering 71% of total asphaltenes. This robust performance is attributed to strong hydrogen bonding and acid-base interactions between the asphaltene active sites and the nanofluid. These findings suggest that the developed carbon-metal nanocomposite offers a corrosion-free, highly efficient, and environmentally friendly strategy for managing asphaltene deposition in complex reservoir conditions.
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