关键词: 稠油-水两相流, 流型, 压降, 混合流速, 反相

Abstract: The experimental study on heavy oil-water two-phase flow in the horizontal pipes was conducted in a steel pipe loop with 25.4 mm in diameter and 52m in length. The visual observation, local sampling methods and the analysis of pressure drop signals were jointly used, and a new flow pattern of Ew/o+D(Ew/o)/w intermittent flow was defined and distinguished. The intermittent flow was composed of two liquid slugs including slug of water in oil emulsion and water in oil emulsion, which dispersed in water phase. The factors affecting the critical conditions for phase inversion were discussed. The mixture velocity was especially studied. The results showed that the increment of mixture velocity would reduce the critical water fraction for phase inversion and lead to phase inversion directly at a fixed water fraction ranged from 35% to 55%.

Key words: heavy oil water two phase flow, flow pattern, pressure drop, mixture velocity, phase inversion