射流涡流复合排水采气装置正交优化设计

Orthogonal Optimization Design of Jet Vortex Composite Drainage Gas Recovery Device

大量产水天然气井急需通过提高气体携液量的方式来减少井底积液,恢复产气能力,为此,提出一种射流涡流复合排水采气装置。以该装置进出口持液率差值作为试验指标,采用正交试验法,通过导入不同参数组合,对建立的模型进行有限元分析,可以选择最优尺寸结构组合。由正交优化设计方法得到,对试验指标有显著影响的因素为喷嘴直径,影响最小的因素为喉管直径。最优装置结构尺寸组合为:喷嘴直径 15 mm,喉管直径 15 mm,喉管长度 140 mm,螺旋角度 55°,螺旋翼宽 3 mm,旋流器直径 40 mm。根据优化后结构尺寸对持液率差值的影响,可以选择最优尺寸结构组合。所得结果可为射流涡流复合排水采气装置的结构优化提供理论支撑。

It is urgent to reduce bottom hole fluid accumulation and restore gas production capacity by increasing the liquid-carrying capacity of gas in many water-producing natural gas wells.A jet vortex composite drainage gas recovery device is designed for this purpose.In this study,taking the difference of liquid holding rate between the inlet and outlet of the device as the test index,by using orthogonal test method,finite element analysis was conducted on the models by importing different parameter combinations,and the optimal combination of structural dimensions was selected.In this orthogonal optimization design method,the nozzle diameter is the most significant factor influencing the test index,and the throat diameter is the least.The optimal combination of structural dimensions of the device is:nozzle diameter 15 mm,throat diameter 15 mm,throat length 140 mm,spiral angle 55°,spiral wing width 3 mm,cyclone diameter 40 mm.According to the influence of optimized structural dimensions on the difference of liquid holding rate,the optimal combination of structural dimensions is selected and it could provide a theoretic support for structural optimization of jet vortex composite drainage gas recovery device.