摘要
该文参考Zhou[1]的多液滴模型,通过可视化实验装置,采用压缩空气和水作为介质模拟气井气体携液过程,验证分析了多液滴模型。通过288次有效实验数据分析发现:气体在携液临界流速时,持液率在大于0.0085时气井开始出现积液,比Zhou所提出的0.01有所偏小;在持液率大于0.0085时,加大气流速度,当气流速度增加到某一值时,液体可以全部被携带出井口,且随着持液率的提高所需要的临界流速也随之增加,从而首次从实验证明了气体携液临界流速与其持液率有明显的关系。本文根据实验数据修改了Zhou的多液滴模型,提出了与实验数据相吻合的新模型。该新模型可用于高含水气井排水采气研究与工程实际应用。
The paper has studied Zhou＇s multi-droplet model by a visualized experimental device. Compressed air and pumped water are used as the gas and liquid phases to simulate the process of liquid unloading in gas wells in the device. Based on 288 experimental tests, it is found that, under the condition of gas velocity higher than critical velocity, gas well will start to load water when liquid holdup gets the value of 0.0085, which is less than the value suggested by Zhou; when liquid holdup is greater than 0.0085, increasing the gas flow velocity will unload all the loaded water, and the greater the liquid holdup value, the higher the required gas flow critical velocity to unload the water. According to the experimental data, this paper modifies Zhou＇s multi-droplet model, and presents a new model which is consistent with the experimental data. The new model can be used of gas well deliquification research and engineering application in high water cut gas wells.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2014年第5期572-579,共8页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金(51074124)~~
关键词
多液滴理论
临界持液率
气体携液临界流速
排水采气
multi-droplet theory
critical liquid holdup
critical velocity of water unloading
gas well deliquification
