Preliminary Study by Reservoir Simulation of Field Trial Polymer Injection in SBR Field Using Silica-Modified HPAM

Polyacrylamide (PAM) is the most inorganic polymer type which is usually used in injection for enhanced oil recovery. Furthermore, hydrolyzed polyacrylamide (HPAM) is a common polymer used in polymer injection, but it has the sensitivity towards salinity and temperature. Thus, the experiment modified PAM and HPAM with silica aims to improve the performance of polymer toward temperature and salinity. This experiment included polymer synthesis, polymer modification, rheological measurement of the product and reservoir modeling study. Some experiments were performed to assess the feasibility of the product. In the polymer injection simulation, the properties of a polymer are referred to as product properties. The best outcome is selected to be implemented in SBR field. Prior to do trial in the real SBR field, the study by simulation is needed. The simulation predicts the incremental oil recovery and helps to determine an optimum injection rate and the best injection well location. The SBR field temperature, the salinity and the oil viscosity were about 60?C, 10,000 ppm and 2.64 cp, respectively. From the viscosity measurement, it was concluded that HPAM-Si was qualified to become a displacing agent because it had the highest viscosity among other product which was about 9.8 cp. The simulator used in this study was black oil IMEX-CMG simulator. The three scenarios applied were the base case, water injection and polymer injection. The base case gained recovery about 15.26%, whereas the water injection with a rate of about 2000 bbl/day gained oil recovery about 21.33%. The best scenario is polymer injection, where the optimum polymer injection rate is about 2000 bbl/day and the highest recovery is approximately 30.73%.