Integration of Profile Control and Thermal Recovery to Enhance Heavy Oil Recovery

The proven reserves of heavy oil in the Bohai oilfield exceed 600 million tons. Heavy is highly viscous, temperature sensitive, and suitable for thermal extraction, but due to strong inhomogeneity reservoir, recovery rate pure extraction development low, there an urgent need conduct research on profile control + guide actual production. In this paper, we propose integrated technology enhance recovery. exhibited dependence nonlinear flow characteristics. An inorganic gel was selected assist Thermal experiments were conducted laboratory using cores saturated by crude with different viscosities simulate areas swept fluid. 4% 6% can seal up 99% 2000 × 10?3 ?m2 cores. As increased from 55 200 °C, efficiency 10.8% 42.9% three-layer heterogeneous cores; it 8.9–13.2% when implemented a concentration 4%. injection parameters optimized fluid area 3/10 times injector–producer distance, including three slugs viscosities. According involving inverted nine-point well pattern, enhances 1.4% compared or alone.