The use of synergistic techniques represents a promising approach for enhancing oil recovery in reservoirs. In this study, a new nanocomposite consisting of magnesium oxide (M), alumina (A), carbomer (CA), carboxymethyl cellulose (C), and Tween 20 (T) was synthesized and named as MACACT. This nanocomposite was then combined with formation water (F) to create a synergistic nanofluid, referred to as MACACTF. The synthesized MACACT nanocomposite was characterized using Fourier transform infrared (FT-IR) spectroscopy, Energy Dispersive X-ray (EDX), thermogravimetric analysis (TGA), Field Emission Scanning Electron Microscopy (FE-SEM), and X-ray diffraction (XRD). The performance of the nanofluid was evaluated through interfacial tension (IFT) measure- ments, contact angle analysis, electrical conductivity, zeta potential tests, and coreflooding experiments. A concentration of 60 ppm of the synergized nanofluid was identified as optimal. At this concentration, the nanofluid dramatically shifted the rock-fluid contact angle to a highly hydrophilic state (22◦). Furthermore, the IFT was reduced to 6 mN/m. Coreflooding tests demonstrated a significant 22 % increase in additional oil re- covery. Overall, this hybrid enhanced oil recovery method proves to be more economically attractive and feasible compared to conventional formation water flooding or nanoparticle flooding alone.
