Enterobacter cloacae as biosurfactant producing bacterium: Differentiating its effects on interfacial tension and wettability alteration Mechanisms for oil recovery during MEOR process

► Microbial enhanced oil recovery experiments carried out using Enterobacter cloacaes. ► In particular, individual effects of wettability and interfacial tension were examined. ► Besides, several effective parameters were tested on tertiary oil recovery. ► SEM images were used to find if biofilm was formed during core flooding experiments.