气举设计适应性评价新方法——气举工况诊断节点分析法

A new method for assessing the adaptability of gas lift design:nodal analysis for gas lift operation diagnosis

在气举装置投入生产前,分析连续气举设计装置对目标油井含水率、气油比、地层压力、产液指数、注气压力和注气量等重要参数的适应范围,评估出气举设计的适应性,进而优化或优选出最佳的气举设计方案是非常必要的。将气举工况诊断与节点分析进行有机结合,分析气举设计对目标油井各重要参数的适应范围,进而制作出不同的含水率、气油比条件下气举地层压力、产液指数适应性图版,得到了气举设计适应性评价新方法。实例分析表明,新方法制作气举设计适应性图版与现场测试判断结果较吻合,可以评价气举设计方案在油井生产中的适应性。

Before the gas lift devices are put into operation, analyzing the applicable range of water-cut, GOR, reservoir pressure, liquid production index, gas injection pressure and injection rate of the target well for continuous gas lift devices, evaluating the adaptability of the gas lift design, and then choosing the optimal gas lift design are really necessary. By combining gas lift operation diagnosis with nodal analysis, and analyzing the gas lift design adaptability to each important parameter of the target well, the adaptability chart for reservoir pressure and liquids production index under different water cut and GOR values was developed, based on which a new approach for the adaptability assessment of gas lift design was estab- lished. Case studies show that the adaptability chart is in good agreement with the judgment results by field test, and can be used to evaluate the gas lift design adaptability in practical production.