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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。
In this paper, we refer to the multidrop model of Zhou [1], and use the compressed air and water as the medium to simulate the gas carrying process through the visual experimental device. The multidrop model is validated and analyzed. Through 288 effective experimental data analysis, it is found that when the gas carrying liquid critical flow rate, gas holdup starts to appear in the gas well when the holdup rate is greater than 0.0085, which is slightly smaller than 0.01 proposed by Zhou. When the holdup rate is greater than 0.0085, When the air velocity increases to a certain value, the liquid can all be carried out of the wellhead. With the increase of the liquid holdup rate, the critical flow rate also increases, and the experiment proves for the first time that the liquid is carried There is a clear relationship between flow rate and liquid holdup. In this paper, the multi-droplet model of Zhou was modified according to the experimental data, and a new model which is consistent with the experimental data was proposed. The new model can be used for the research and engineering application of drainage and gas recovery in high water cut gas wells.