高气液比气井临界携液气流量计算新模型

New model to calculate critical liquid-carrying gas flow rate in gas well with high gas-liquid ratio

周舰 罗懿 李璇 周瑞立

中国石化华北分公司工程技术研究院，河南 郑州 450006

1.Research Institute of Engineering and Technology, Huabei Company, SINOPEC, Zhengzhou 450006, China;
2.School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China

基于气井井筒积液对气藏开发的危害性，在现有携液模型的基础上，利用受力平衡理论和能量守恒原理，建立了气井临界携液气流量计算新模型。其中，通过引入系数C■，对液滴大小及液滴变形特征进行了综合表征。模型计算结果表明，新模型系数C■随压力增大而增大，有效地弥补了现有携液模型存在的不足。现有携液模型及新模型的适应性分析结果表明，新模型在高、低压气井中均具有良好的适用性。现场应用新模型有效预测了大牛地气田气井的积液状态，这为产水气藏的有效开发提供了强有力的技术支持。

As liquid loading in gas well will bring serious damage to the development of gas reservoir, a new model to predict the critical liquid-carrying gas flow rate has been established with liquid-droplet force equilibrium theory and energy conservation principle based on the currently used liquid-carrying models. The new coefficient is introduced into the model to comprehensively characterize the droplet size and deformation characteristics. The calculation results of the model show that the new model coefficient, becomes larger with the increase of pressure, which compensates the defects of the currently used liquid-carrying models. Adaptability analysis results of the new model and the currently used models show that the new model has high accuracy in both low and high pressure gas wells. The new model is applied to effectively predict effusion status in Daniudi Gas Field. It provides a strong technical support for the effective development of water-produced gas reservoir.

10.6056/dkyqt201306024