Controlled Salinity-Biosurfactant Enhanced Oil Recovery at Ambient and Reservoir Temperatures—An Experimental Study

In this paper, a thorough experimental investigation of enhanced oil recovery via controlled salinity-biosurfactant injection under typical reservoir temperature conditions is reported for the first time. Sixteen core flooding experiments were carried out with four displacing fluids in carbonate rock samples and improved was investigated secondary, tertiary quaternary modes. The effect on during floodings compared at two temperatures (23 °C 70 °C) similar using types biosurfactants: GreenZyme® rhamnolipids. results study show that salinity brine (CSB) biosurfactant (CSBSB) improve relative to high formation (FMB) both low temperatures. At 23 °C, CSBSB by 15–17% OIIP conventional FMB injection, 4–8% CSB injection. increased 10–13% FMB, 2–6% Furthermore, increase system generally resulted recovery, irrespective type brine. have demonstrated time potential combined applications relevant hydrocarbon reservoirs. are significant design