Abstract During drilling or oil recovery, it is common that the formation trap gas invades the vertical wellbore/pipeline to cause the gas-liquid two-phase flow, which brings challenges and dangers to wellbore/pipeline pressure control. In this paper, coupling the interfacial mass transfer theory of slip-rising bubbles based on bubble hydraulics to the gas-liquid two-phase flow theory, a new transient non-isothermal gas-liquid two-phase flow model in the vertical wellbore/pipeline was developed. In this model, the effects of flow regime and heat transfer on the mass transfer rate were considered. The proposed model was validated using the measured experiment data and field data. Using this model, the effect of interfacial mass transfer of slip-rising bubbles on the evolution of gas-liquid two-phase flow in a special gas kick scenario was analyzed. The simulation results indicated that the mass transfer rate between oil dispersion and invasion gas was relatively slow, which made the gas not instantaneously dissolved in the oil dispersion or not instantly saturated the oil dispersion. Under the same gas invasion rate, the fraction and mass of free gas calculated by this model were always larger than those obtained by Yin's model, resulting in a faster of the bottomhole pressure reduction rate and pit gain increase rate. Additionally, increasing the gas concentration and flow rate could promote the interphase mass transfer rate, while increasing the temperature would inhibit it. This model could characterize the wellbore/pipeline gas-liquid two-phase flow with interphase mass transfer in more detail and accurately.

中文翻译：

---

滑升气泡界面传质对垂直井筒/管道两相流的影响

摘要 在钻井或采油过程中，地层圈闭气侵入垂直井筒/管道引起气液两相流动的现象屡见不鲜，给井筒/管道压力控制带来挑战和危险。本文将基于气泡水力学的滑升气泡界面传质理论与气液两相流理论相结合，建立了一种新的垂直井筒/管道瞬态非等温气液两相流模型。已开发。在该模型中，考虑了流态和传热对传质速率的影响。使用测量的实验数据和现场数据验证了所提出的模型。利用该模型，分析了特殊气涌情况下滑升气泡界面传质对气液两相流演化的影响。模拟结果表明，油分散体与侵入气之间的传质速率较慢，使得气体不会瞬间溶解在油分散体中或不会立即饱和油分散体。在相同的气体侵入速率下，该模型计算出的游离气的比例和质量总是大于Yin的模型，导致井底压力降低速率和井增速率更快。此外，增加气体浓度和流速可以促进相间传质速率，而升高温度会抑制它。该模型可以更详细、更准确地表征具有相间传质的井筒/管道气液两相流。