a new injection protocol was designed to systematically investigate the individual effects of the IFT reduction and
wettabilityalterationontheultimateoilrecoveryduringinsituand
ex situ microbial core flooding tests. In addition, Amott wettability tests and interfacial tension measurements as well as viscosity
and pH measurements were performed to check the other effective mechanisms. Enterobacter Cloacae – a facultative biosurfactant
producing strain, isolated from southern heavy oil contaminated soil in Iran, was used as the microbial formulation in this
study