海洋稠油资源是未来原油产量增长的重要来源,但相对于陆上油田,海洋稠油集输因涉及低温环境与立管输送而更具挑战性。采用水环举升稠油可以极大地减小输送摩阻,是一种非常有潜力的稠油“冷输”方法。基于油水两相流及计算流体动力学理论,利用FLUENT 6.3.26及GAMBIT2.3.16软件,建立了垂直上升稠油-水中心环状流(CAF)的几何模型与数学模型,评价了模型的有效性,模拟分析了垂直上升CAF的流态及特点,探讨了不同水环生成器环隙宽度及油水流速对垂直上升CAF的影响。结果表明:当油水流速比在一定范围内时,所建模型对垂直上升CAF的模拟结果与实验结果一致性较好;垂直上升CAF在入口端能保持理想的中心环状流,具有光滑的油水界面,但随着油水协同向上流动,油水界面开始波动;水环生成器的环隙宽度对垂直上升CAF的影响较大,环隙过小,水环稳定性较差,流动摩阻较大,而环隙过大则输油量较小;同时兼顾能耗与输油量,在模拟条件下,水环生成器环隙宽度为1.8 mm时输油效率最高。(图7,表1,参13) Heavy marine oil resources are an important source of oil production growth in the future. However, compared with onshore oil fields, the gathering of marine heavy oil is more challenging due to the low temperature environment and riser transportation. The use of a water ring to lift a heavy oil can greatly reduce the transport resistance, which is a very promising method for heavy oil transport. Based on the theory of oil-water two-phase flow and computational fluid dynamics, the geometrical model and mathematical model of vertically rising heavy oil-water annular flow (CAF) were established by using FLUENT 6.3.26 and GAMBIT 2.3.16 software, and the model was validated The flow pattern and characteristics of vertically rising CAF were simulated and analyzed. The effects of ring gap width and oil-water flow velocity on vertical rising CAF of different water ring generators were discussed. The results show that the proposed model has good agreement with the experimental results when the flow velocity ratio of water to oil is within a certain range. The vertical rising CAF maintains the ideal annular flow at the inlet end with a smooth oil-water However, as the oil-water flowed upwardly, the interface of oil-water began to fluctuate. The annular gap width of water ring generator had a great influence on the vertical rising CAF, the annular gap was too small, the stability of water ring was poor, However, when the annulus is too large, the oil delivery is small. At the same time, taking into account the energy consumption and the amount of oil delivered, under the simulation conditions, the maximum efficiency is achieved when the annulus width of the water ring generator is 1.8 mm. (Figure 7, Table 1, Reference 13)