可控定量配注器恒流阀恒流特性数值研究

摘要

Shengli oilfield has rich resource of thickene d oil.In order to improve the recovery ratio of steam huff and puff,the controllable quantitative requirement of layering steam injection technology can be realized by the controllable quantitative injection allo-cator designed according to the principle of layering steam injection technology.In order to further understand the flow inside the valve and confirm the pressure differential range required for maintaining the constant flow,FLUENT hydromechanics software was applied to conduct the numerical simulation study of the internal flow field of permanent flow valve.The research results show that as for the flow inside valve with the fluid medium of water,the peak flow rate occurs at the gap between the floater and fixed pore plate;and under this gap,the backflow is formed.The fluidic divergence phenomenon occurs in the downstream area;two swirls are formed and con-sume the energy of mainstream movement,which will lead to the pressure drop and energy reduction.The variation range of outlet and inlet differential pressure (Δp)required for maintaining the constant flow rate (Q=0.5 m3/h)is 900~7 400 Pa.%胜利油田具有丰富的稠油资源，为了提高蒸汽吞吐采收率，根据分层注汽工艺原理设计的可控定量配注器可以实现分层注汽工艺技术的可控定量要求。为进一步认识可控定量配注器恒流阀阀内流场和确定维持恒流的压差范围，利用FLUENT流体力学软件对恒流阀内流场进行了数值模拟研究。研究结果表明：对于流体介质为水的阀内流动，最高流速出现在浮子与固定孔板之间的缝隙处，且在缝隙下游形成回流，下游区域发生流体分离现象，形成两个旋涡，消耗了主流运动的能量，导致压降和能量的降低；维持恒定流量Q＝0.5 m3/h所需出、入口压差Δp在900～7400 Pa之间。