A prediction model for continuous liquid-carrying in gas wells considering droplet entrainment

被引：0
|
作者：
Pan J. [1 ,2 ]
Wang W. [1 ]
Wang L. [3 ]
Zhang L. [1 ]
Chen J. [1 ]
Pu X. [1 ]
机构：
[1] College of Petroleum Engineering, Xi'an Shiyou University( Post-doctoral Innovation Base of Shaanxi Province), Xi'an, 710065, Shaanxi
[2] Post-doctoral Research Station of Oil and Gas Engineering, China University of Petroleum, Beijing
[3] No.4 Gas Production Plant, PetroChina Changqing Oilfield Company, Ordos, 017300, Inner Mongolia
来源：
Shiyou Xuebao/Acta Petrolei Sinica | 2019年 / 40卷 / 03期
关键词：
Critical liquid-carrying velocity; Droplet entrainment; Liquid film flow; Liquid holdup; Liquid loading; Water-bearing gas reservoir;
D O I：
10.7623/syxb201903007
中图分类号：
学科分类号：
摘要：
In the development of water-bearing gas reservoir, with the reduction of reservoir pressure and the increase of water content, the natural gas is no longer capable of lifting liquid to surface which triggers gradual accumulation of liquid in the bottom of wellbore. Liquid loading can reduce gas production, even completely kill gas wells and stop production. Accurate prediction of critical liquid-carrying velocity has an important significance for liquid loading judgment and optimization allocation in gas well production. Through analyzing the force balance of gas-liquid two-phase flow, we established a new liquid film model which take into account the impacts of liquid entrainment, to predict the minimum gas velocity for continuous liquid-carrying in gas wells. A droplet entrainment onset criterion based on critical liquid film flow rate and critical gas velocity, and a droplet entrainment rate correlation considering the influences of liquid film atomization and droplet deposition at gas-liquid interface were employed in the model. The present and existing liquid film-based critical gas velocity models are validated and compared with the actual gas wells data. The results show that the present model agrees well with the actual state of gas wells, implying it can be used to judge the liquid loading in gas wells. © 2019, Editorial Office of ACTA PETROLEI SINICA. All right reserved.
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页码：332 / 336
页数：4
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