抄録
High water cut oilfields, typically in the mid-to-late stages of development, face challenges such as declining reservoir energy, complex oil-water migration, and highly heterogeneous remaining oil distribution. These issues hinder conventional recovery methods and constitute key technical bottlenecks for enhanced oil recovery (EOR). As most major Chinese oilfields enter this stage, improving recovery is vital for sustaining production, extending field life, and ensuring national energy security. Addressing injection-production imbalance, rising water treatment demands and energy consumption calls for a shift toward digital, intelligent, and eco-friendly development models. This paper identifies five key research directions aligned with current technological trends: intelligent injection-production optimization, nanofluid EOR, fine-scale residual oil characterization, multi-field coupled chemical flooding, and integrated CO₂-EOR with sequestration. These approaches aim to advance both the theory and practice of EOR in high water-cut oilfields.
