Bottom water breakthrough is a common occurrence during horizontal oil well exploitation.Once the water content of the horizontal oil well rapidly rises,the oil reservoir's water-free operation period is considerably de-creased,severely reducing the horizontal oil well's exploitation efficiency.Fluidic Diode Type Automatic Inflow Control Device(FD-AICD)may stabilize oil and control water while alleviate the phenomena of bottom water breakthrough.However,FD-AICD cannot meet all the ideal water control requirements of oil wells in current application process.In this paper,the pressure loss-flow relationship of FD-AICD for liquids with different physical properties was obtained through experimental research and numerical simulation,and the reliability of the numerical simulation model was ver-ified.The flow field characteristics of FD-AICD through water and oil were obtained by computational fluid dynamics method,the fluid sensitivity analysis was carried out,and the influence of structural parameters on the water control performance of FD-AICD was studied.The results indicate that:the pressure loss of the fluid flowing through the FD-AICD increases with the increase of the flow rate,and the pressure loss of the water flow is higher than that of the oil flow;The water flow mainly flows into the annular chamber through the tangential main channel for high-speed rota-ting flow,while the oil flow mainly flows into the annular chamber through the radial branch flow channel,and directly flows to the outlet without rotation;The influence of flow rate and viscosity on the pressure loss is higher than that of fluid density;The channel thickness and the outlet hole diameter have a significant effect on the pressure loss of the fluid flowing through the FD-AICD,and the effect of the angle difference between the inner and outer ring baffles is not obvious.
关键词
水平井控水/过流特性/控水原理/压力损失
Key words
Water Control for Horizontal wells/Flow-through characteristic/Flow control principle/Pressure loss
维普
万方数据