Perpustakaan Digital ITB

This study discusses the use of nanoparticles (NPs) in enhancing oil recovery. Numerous studies have explored this topic, showing that NPs can improve oil recovery in various experiments. Additionally, NPs are often combined with surfactants, both of which have advantages in improve oil recovery. Surfactants can reduce the interfacial tension between two-phase liquids and also decrease the contact angle, which are key parameters for enhancing oil recovery. NPs contribute through the wedge effect, forming a wedge film on the rock surface, reducing the contact angle, and decreasing interfacial tension. This helps to recover trapped oil on the rock surface and mobilize the oil. In this experiment, anionic surfactant with a Critical Micelle Concentration (CMC) of 0.025% was used, along with various concentrations of silica dioxide nanoparticles (0.025% , 0.05% , and 0.1%). Eight different solutions were tested to observe the effects of these various combinations. Interfacial tension was measured using a Spinning Drop Tensiometer, and contact angle was measured using One Attension Theta Flow. The lowest IFT value obtained was 3.61 × 10-4, and the lowest contact angle was 24°. These results indicate significant potential for further studies on well and field scales, aiming to enhance oil recovery.