Abstract: The flow law in condensate gas wells is largely difference from that in conventional gas wells. However, the prediction of the critical liquid-carrying flow rate of condensate gas wells is still based on the calculation model of conventional gas wells, which leads to large errors. In order to solve the problem, a universal model for predicting the critical liquid-carrying flow rate of condensate gas well is established. It is shown that the main factors affecting the accuracy of the new model include temperature, pressure, drag coefficient, surface tension and critical Weber number. And the calculation formulae of the above parameters are also given. It is indicated that the calculation error of the prediction model is less than 10% and its calculation accuracy is 26% ~ 41 % higher than that of other models for liquid-carrying flow rate of condensate gas wells. The research achievements in this paper are of vital guiding significance in enhanced oil recovery technology of condensate gas wells.

摘要： 凝析气井中流体的流动规律与常规气井有较大差异，但目前凝析气井的临界携液流量预测仍采用常规气井的相关计算模型，从而造成预测误差较大，与现场实际情况不符。针对这一问题，基于质点分析理论和气液雾状流转换理论，首先推导出了凝析气井临界携液流量预测的通用模型，通过分析得出，影响新模型预测精确性的主要因素包括温度、压力、曳力系数、表面张力和临界韦伯数。然后经过优选得到温度、压力和表面张力的计算关系式，论证了临界韦伯数取定值的不准确性，并使用精确度对比和非线性拟合方法得到层流和湍流条件下曳力系数的计算关系式。最后分别建立了产油凝析气井和油水同产凝析气井多元耦合计算模型。现场实例计算分析结果表明，所建立的新模型预测精度超过 ９０％，与凝析气井临界携液流量常用计算模型相比，预测精度提高了 ２６％～４１％。该研究成果对于提高凝析气井的最终采收率具有一定的指导意义。

关键词: 凝析气井, 定向井, 临界携液流量, 液滴模型, 通用模型, 排液采气, 提高采收率