Simulasi Kinerja Enhanced Oil Recovery (EOR) dengan Polymer dan Solvent CO2 pada Sumur Injeksi di Lapangan Norne Segmen C

Abstract

The availability of global oil reserves was decreasing while production from conventional wells continued to decline, raising concerns about a future energy crisis. Enhanced Oil Recovery (EOR) could increase production by up to 30-60% of total reserves. The Norne Field in Norway had significant potential for EOR, particularly using polymer and CO2 solvents, which increased the viscosity of injection water and dissolved oil to facilitate its flow to the surface. This study aimed to determine the recovery factor and efficiency of EOR using polymer and CO2 injection in the Norne Field Segment C, and to compare the best method between them. Performance simulations were conducted on selected injection wells (C-1H, C-2H, C-3H, and C-4H) with continuous polymer and CO2 solvent injection. The results show that continuous polymer injection in well C-2H achieves a recovery factor of 49%, and continuous CO2 solvent injection achieves 46.45%, both higher than the base case of 46%. Gas recovery factors for the base case, polymer, and CO2 solvent are 70.50%, 61%, and 71%, respectively. CO2 solvent injection efficiency is lower than polymer due to segregation in the reservoir, while polymer injection is more efficient in spreading through the reservoir area, enhancing oil production macroscopically and microscopically. The simulation indicates that continuous polymer injection is better than continuous CO2 solvent injection in the Norne Field Segment C.