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چکیده
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Generally, nanoparticles are used in enhanced oil recovery (EOR) methods to improve surface activity at the oil/rock/fluid interface. The goal of this literature is the development of a new nano-composite for use as a hybrid agent for EOR. In this regard, synthetic nano-composite was synthesized using a multi-step approach. In order to confirm the synthetic structure of nano-composite, FTIR, XRD, BET, SEM and EDX tests were used. In this regard, tests such as contact angle (CA), stability and compatibility of nano-composite, interfacial tension (IFT), zeta (ζ) potential, and core flooding were done. XRD analysis confirmed the crystal structure of nano-composite (CuO/Al2O3/carbomer). Also, the EDX analysis showed the purity of nano-particles for both samples. On the other hand, BET analysis of surface area for CuO/Al2O3 and CuO/Al2O3/Carbomer showed 67.34 m2/g and 14.63 m2/g, respectively. This synthetic CuO/Al2O3/carbomer nano-composite was able to provide superhydrophilic wettability for core rock. The results of CA tests in the presence of hybrid agent (400 ppm) showed that superhydrophilic wetting (CA = 32°) was obtained. Also, the IFT decreased to the lowest required value (IFT = 7.8 mN/m). In the presence of hybrid agent (400 ppm), oil recovery (OR) increased by 26 % (core 1) and 21 % (core 2), respectively.
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