准确预测气井临界携液气流量，对优化气井工作制度、排除井筒积液具有重要意义。 现有液滴模型未考虑液滴变形和液滴大小的影响，将临界韦伯数取为定值或认为临界携液气流量与临界韦伯数无关，导致模型的关系式系数为定值，存在一定理论不足。 综合考虑液滴变形和液滴大小特征，由液滴质点力平衡理论和能量守恒原理导出了气井临界携液气流量计算新模型。 新模型的关系式系数随压力增大而变大，为 1.92～5.30，弥补了现有液滴模型的关系式系数为定值的缺陷。 现场应用表明：新模型预测大牛地气田气井积液状态与实际较吻合，可满足生产要求。

Accurate prediction of the critical liquid-carrying gas flow is very important to optimize work systems and exclude wellbore effusion for gas well. The currently used liquid-carrying models generally fail to comprehensively consider the influence of liquid droplet deformation and size for the critical liquid-carrying gas flow, and critical Weber number is taken as a given value or critical liquid-carrying gas flow has nothing to do with the Weber number, which is certainly lack of theory. Considering the droplet size and droplet deformation characteristics, and combined with the critical Weber number algorithm of Tatterson and Azzopdiar, based on the liquid droplet partial force equilibrium theory and energy conservation principle, we deduced a new model to predict the critical liquid-carrying gas flow. The new model coefficient varies from 1.92 to 5.3, which becomes larger with the pressure gradually, and it is to make up a defect on a given value of the coefficients of the currently used liquid-carrying models. Field application shows that the predicted effusion status of the vertical wells by this new model is agreed with actual effusion status, which can meet the production requirements.