Perpustakaan Digital ITB

The Ministry of Energy and Mineral Resources (ESDM) has set a production target of 1 million BOPD by 2030. However, many fields have experienced a drastic decline and have matured, making this production target challenging. The application of Chemical Enhanced Oil Recovery (EOR) in waxy oil reservoirs has the potential to support this commitment. Laboratory studies through coreflooding experiments have been conducted previously. The study results successfully demonstrated that surfactant polymer flooding can increase oil recovery by 27.47% compared to waterflooding. This study aims to predict the effectiveness of applying surfactant polymer flooding using numerical simulation with CMG-STARS at the field scale, determine the optimal injection strategy through sensitivity analysis of key injection parameters, and evaluate its streamline form. This study began with calibrating the core model with laboratory test results. The core model was then recalibrated through a connecting model. Field-scale simulations used a conceptual model with a 5-Spot well pattern. Numerical simulation results showed that the increase in oil recovery through surfactant polymer flooding decreased to 7.55%. This result is due to the level of heterogeneity at the field scale. Through the determined injection strategy, the increase in oil recovery can be optimized to 12.27%.