考虑液滴夹带的气井连续携液预测模型

doi:10.7623/syxb201903007

石油学报

考虑液滴夹带的气井连续携液预测模型

潘杰^1,2, 王武杰¹, 王亮亮³, 张丽¹, 陈军斌¹, 蒲雪雷¹

1. 西安石油大学石油工程学院陕西省博士后创新基地陕西西安 710065;
2. 中国石油大学(北京)石油与天然气工程博士后科研流动站北京 102249;
3. 中国石油长庆油田公司第四采气厂内蒙古鄂尔多斯 017300

收稿日期:2018-02-24 修回日期:2018-09-09 出版日期:2019-03-25 发布日期:2019-03-29
通讯作者: 陈军斌,男,1963年4月生,1986年获南开大学学士学位,1997年获西南石油学院博士学位,现为西安石油大学教授,主要从事油气藏渗流理论及提高采收率技术方面的研究。Email:chenjbxu@126.com
作者简介:潘杰,男,1981年8月生,2006年获西安交通大学学士学位,2011年获西安交通大学博士学位,现为西安石油大学副教授,主要从事油气多相流与传热传质、LNG低温传热与冷能利用方面的研究。Email:jackpan@xsyu.edu.cn
基金资助:
国家自然科学基金项目（No.51774237，No.51304160）、陕西省博士后科研项目（2016BSHEDZZ25）和陕西省教育厅科研计划项目（15JK1581）资助

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

Pan Jie^1,2, Wang Wujie¹, Wang Liangliang³, Zhang Li¹, Chen Junbin¹, Pu Xuelei¹

1. College of Petroleum Engineering, Xi'an Shiyou University;Post-doctoral Innovation Base of Shaanxi Province, Shaanxi Xi'an 710065, China;
2. Post-doctoral Research Station of Oil and Gas Engineering, China University of Petroleum, Beijing 102249, China;
3. No.4 Gas Production Plant, PetroChina Changqing Oilfield Company, Inner Mongolia Ordos 017300, China

Received:2018-02-24 Revised:2018-09-09 Online:2019-03-25 Published:2019-03-29

摘要/Abstract

摘要：

在有水气藏开发过程中，随着气藏压力的降低和含水量的增加，井筒内的气相能量不足以将水携带到地面，导致井底积液，从而影响气井产量，严重时甚至压死气井，造成停产。准确预测气井临界携液流速对判断气井是否积液和优化气井配产具有重要的意义。基于液膜携液假设，通过气液两相流受力平衡分析，建立了考虑液滴夹带影响的气井连续携液预测模型。模型引入了基于临界液膜流量和临界气相流速的液滴夹带判据，并采用了考虑液膜雾化与液滴沉积动态过程影响的液滴夹带率计算公式。结合实际气井生产数据，所建立模型与现有的液膜临界流速模型的对比结果表明，该模型的预测结果与气井实际状况更加吻合，可用于气井积液的判断。

关键词: 有水气藏, 井底积液, 临界携液流速, 液膜流动, 持液率, 液滴夹带

Abstract:

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.

Key words: water-bearing gas reservoir, liquid loading, critical liquid-carrying velocity, liquid film flow, liquid holdup, droplet entrainment

中图分类号:

TE341

潘杰, 王武杰, 王亮亮, 张丽, 陈军斌, 蒲雪雷. 考虑液滴夹带的气井连续携液预测模型[J]. 石油学报, DOI: 10.7623/syxb201903007.

Pan Jie, Wang Wujie, Wang Liangliang, Zhang Li, Chen Junbin, Pu Xuelei. A prediction model for continuous liquid-carrying in gas wells considering droplet entrainment[J]. Acta Petrolei Sinica, DOI: 10.7623/syxb201903007.

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考虑液滴夹带的气井连续携液预测模型

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

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