Perpustakaan Digital ITB

In this study, the author simulates polymer flooding at a field scale. Polymer flooding is an enhanced oil recovery (EOR) method designed to improve the mobility ratio and sweep efficiency compared to waterflooding. The high viscosity of the polymer solution increases sweep efficiency and reduces the mobility ratio of the displacing fluid, minimizing channeling. This study uses the static model of the Norne field published by Equinor, which is used for further studies including static model conversion, history matching, and forecasting from 2003 to 2010. Laboratory data is used for field-scale testing to evaluate the EOR potential through polymer flooding in Segment E of the Norne Field using CMG-STARS reservoir simulation. Approximately 33% of the oil has been recovered, indicating potential trapped oil, especially in the Ile and Tofte formations of Segment E, even after primary recovery and waterflooding as secondary recovery techniques. Simulations comparing oil recovery between waterflooding and polymer flooding using hydrolyzed polyacrylamide (HPAM), which can withstand temperatures above 120°C, show significant improvements in oil production rates, subsurface pressure, and oil recovery. Additionally, an economic analysis based on the most optimal polymer flooding scenario is presented.