Performance of Pineapple Peel Waste as Surfactant Flooding in Enhanced Oil Recovery

—Oil and natural gas are still the dominant energy sources in Indonesia's energy use, so many efforts have been made to increase their reserves. One effort is to increase oil recovery by Enhanced Oil Recovery method, especially chemical flooding using surfactants. One of the raw materials that can be synthesized into surfactants is pineapple peel. Pineapple peel is processed into eco enzyme and used as EOR injection fluid. This process simultaneously overcomes wasted fruit peel waste. The method used was laboratory research with salinity variables, 20,000 ppm and 40,000 ppm, at surfactant eco enzyme concentrations of 20%, 30% and 40%. Characteristics of pineapple peel eco enzyme can reduce the IFT from 12.71 dyne/cm to 6.52 dyne/cm at 40,000 ppm salinity solution. The best results are obtained by mixing pineapple peel eco-enzyme at a concentration of 30% with a salinity of 40,000 ppm which can increase the recovery factor by 57.2%. The increase in oil recovery only occurred slightly, from water flooding to surfactant flooding there was only an increase of 3%. From this condition it can be concluded that the use of pineapple peel eco enzyme requires a cosurfactant in order to increase oil recovery