气井连续携液模型比较研究

气藏中天然气常常和一些液相物质一起产出。若天然气没有充足的能量把液体举升出地面，液体将在井中堆积形成积液，影响气井的生产能力。有时气井积液会完全压死气井。已有许多气井连续排液关联式。为了更好地理解和采用正确的气井连续排液临界流量计算关联式，确定气井的合理产量，对Min LI和Turner et al的气井连续携液模型进行了比较研究，比较的内容包括：（1）液滴在高速运动气流中的形状；（2）曳力系数；（3）临界流速计算公式；（4）用现场实际生产数据对Min LI和Turner et al的气井连续携液模型进行了比较，比较结果表明Min LI气井连续排液公式计算的临界流量与实际的生产情况吻合。为了便于现场应用，还导出了临界流量和产量的简化计算公式。

Comparative Study of Two Models for Continuous Removal of Liquids from Gas Wells

Gas produced from a reservoir tends to have liquid phase material with it, which can accumulate in the wellbore over time when the transporting energy is low enough. The liquid thus accumulated will cause additional hydrostatic pressure onthe reservoir, resulting in a continued reduction of available transportation energy and affecting the production capacity. In some cases, it even causes gas well to die. Many formulas related to the determination of critical rate for continuous removal of liquids from gas well have been proposed. Two of the models, as proposed by Min LI and Turner et al, respectively, are compared in this paper. The comparative study includes: (1) The shape of liquid droplets entrained in high velocity stream; (2) The drag coefficient; (3) The terminal velocity and critical rate formulae; (4) Comparative study with field data. For the easier application purpose, simplified formulas for the calculation of critical rate and production rate are also deduced and given in the paper.