两种结构型式控流筛管内流动特性的数值研究

摘要

InflOw cOntrOl device can efficiently get inflOw in the hOrizOntal part Of Oil well by cOntrOlling the liquid prOductiOn Of Other part, and cOntrOl unit is the cOre cOmpOnent Of this tOOl. FlOw characteristics Of helical-flOw-channel and labyrinth-flOw-channel cOntrOllers were simulated based On cOmputatiOnal fluid dynamics, and scOpes cOmparative analysis Of the twO cOntrOllers was carried Out. The numerical results shOw that channel pressure decreases linearly frOm channel inlet tO the Out-let fOr the twO cOntrOllers. The flOw pattern in helical-flOw-channel apprOximates plug flOw, swirl and turbulence are nOt sig-nificant. There are distinct primary and secOndary vOrtexs in labyrinth-flOw-channel under the cOnditiOns Of lOw viscOsity, which results in large pressure drOp. Helical-flOw-channel cOntrOller has better perfOrmance when viscOsities range frOm 25 tO l 000 mPa·s, while labyrinth-flOw-channel cOntrOller has better perfOrmance in Other viscOsity ranges.%控流筛管可通过控制油井部分井段产出液流量实现水平段同时出水。以计算流体动力学为基础，分别对导流式控件和迷宫式控件流道内流体的流动特征进行数值模拟，并对两种控件的适用范围进行对比分析。数值计算结果表明，两种控件由流道入口到出口的流道压力均呈线性降低；导流式控件流道中的流动近似呈平推流，涡流和湍动不显著；低黏度条件下，迷宫式控件流道内存在明显的一次、二次涡流，过流阻力显著增加，控流效果显著。过流流体黏度为25~l 000 mPa·s时，导流式控件的性能较优；其他黏度范围内，迷宫式控件的性能较优。