Polymer Applications in Enhanced Oil Recovery: A Review
ABSTRACT
Enhanced Oil Recovery (EOR) is an essential technique for increasing oil production from mature reservoirs, extending the life of existing fields. Among various EOR methods, polymer flooding stands out due to its ability to improve sweep efficiency and control the mobility of injected fluids, leading to enhanced oil displacement. This review delves into the role of polymers in EOR, examining the underlying mechanisms, types of polymers used, and the latest advancements in the field. The discussion emphasizes the importance of polymer properties, such as viscosity, thermal stability, and salt resistance, and explores formulation considerations for optimizing performance in different reservoir conditions. Additionally, emerging trends like smart polymers, which are responsive to environmental stimuli, and nanocomposite-enhanced polymers, which improve stability and retention in harsh reservoir conditions, are highlighted as key innovations that could significantly enhance oil recovery efficiency. The review also addresses the challenges in polymer flooding, including polymer degradation, adsorption on reservoir rock surfaces, and environmental concerns, while suggesting potential solutions and future research directions to further optimize the method.
