气井出砂对涡流工具携液能力的影响

为分析气井出砂对涡流工具携液能力的影响情况,针对气井井底积液以及井筒中存在固体杂质的问题,提出了一种气井中涡流工具携液携砂的三相流模型。通过对气井含砂与不含砂的情况进行模拟,分析了不同条件下涡流工具的携液作用,得到了气井出砂对液相流动规律、体积分数、速度分布的影响情况。结果表明:出砂量为10%的情况下,气井含砂有利于气井携液。气井含砂使运动阻力增加,液相的运动速度减小,轴向速度分布不规律,紊流程度增强,从而使运动更加复杂,气井对液体的携带作用增强;气井含砂使液相的运动速度减小且分布不规律。研究结果对进一步完善涡流工具的排水采气机理、提升气井的携液携砂效果具有参考价值。

Influence of gas-well sand production on liquid carrying capacity of swirling tools

In order to analyze the effect of gas-well sand production on the liquid carrying capacity of the vortex tool, aiming at the problem of simultaneous sand production and water discharge in gas wells, a three-phase flow model of eddy current tool carrying liquid and sand is proposed. By simulating the sand and sand-free conditions of gas wells, and by analyzing the liquid-carrying of swirl tool under different conditions, the influence of gas-well sand production on liquid phase flow pattern, volume fraction and velocity distribution is obtained. It is concluded that the sand content of the gas well is beneficial to the liquid well carrying liquid in the case of 10% sand production, gas-well sand causes motion resistance increasing, movement speed decreasing of the liquid phase, causing irregular axial velocity distribution, and increased turbulence, thereby making the movement more complicated, and enhancing the carrying effect of the gas-well on the liquid. The sand content of the gas-well reduces the movement speed of the liquid phase and the distribution is irregular. The research result provides reference for further development of the theory of swirl tool drainage gas recovery and the carrying effect of gas-well on liquid and sand.