Perpustakaan Digital ITB

Indonesia must increase its oil and gas production to meet domestic energy needs. One essential strategy to address this challenge is implementing Enhanced Oil Recovery (EOR). Chemical enhanced be implemented (EOR), a method that does not rely on heat, has been suggested to enhance oil extraction because it is simple to implement and highly effective. This study aims to understand the performance of polymers in enhancing the recovery factor and to identify the optimal mobility ratio for polymer injection in a homogeneous micromodel. The stages of this research include the creation of the micromodel, rheology tests, permeability measurements, and micromodel flooding. The mobility ratio is determined from the results of oil and polymer rheology tests by measuring the concentrations of oil and fluids. Following this, micromodel flooding is performed with four parameters. This study specifically uses FP3630S, a type of HPAM (Partially Hydrolyzed Polyacrylamide) manufactured by SNF. This choice was made because FP3630S is highly effective, characterized by its absence of precipitation and excellent heat stability. The results from the liquid permeability tests conducted twice show that the permeability as a property is 3888.92 mD. From the rheology tests on the oil, the viscosity was measured at 3.49 cP in the first test and 3.44 cP in the second test. Rheology tests on the polymer and oil show that the polymer with a concentration of 280 ppm has a mobility ratio of 0.91, the polymer with 500 ppm has a mobility ratio of 0.50, and the polymer with 660 ppm has a mobility ratio of 0.36. Based on the micromodel flooding test results, water injection reduced oil saturation from an initial 32.92% to 14.81%. Meanwhile, polymer injection at a concentration of 280 ppm improved oil recovery, as evidenced by a reduction in oil saturation from 30.36% to 7.73%. For 500 ppm polymer, oil saturation decreased from 30.49% to 6.92%, and for 660 ppm polymer, it decreased from 31.69% to 4.59%. The recovery factors were found to be 65.46% for water flooding, 74.54% for polymer injection at 280 ppm, 77.31% for polymer injection at 500 ppm, and 88.51% for polymer injection at 660 ppm. Therefore, the highest recovery factor result most effectively indicates a mobility ratio approaching 0.3.