Editorial office of ACTA PETROLEI SINICA ›› 2010, Vol. 31 ›› Issue (4): 637-639.DOI: 10.7623/syxb201004022

• Oil Field Development • Previous Articles     Next Articles

Calculation method for critical flow rate of carrying liquid in horizontal gas well

LEI Dengsheng 1  DU Zhimin 1  SHAN Gaojun 2,3  TANG Yong 1  LI Jiansong 1  FU Yu 1   

  • Received:2009-10-14 Revised:2009-12-02 Online:2010-07-25 Published:2010-09-25

气藏水平井携液临界流量计算

雷登生 1  杜志敏 1  单高军 2,3  汤  勇 1  李涧松 1  付  玉 1   

  1. 1西南石油大学油气藏地质及开发工程国家重点实验室  四川成都  610500; 2 中国石油大庆油田有限责任公司勘探开发研究院  黑龙江大庆  163712; 3东北石油大学博士后流动站  黑龙江大庆  163318
  • 通讯作者: 雷登生
  • 作者简介:雷登生,男,1979年8月生,2004年获西南石油大学油气田开发工程专业硕士学位,现为西南石油大学博士研究生,主要从事油藏工程和数值模拟方面的工作。
  • 基金资助:

    国家自然科学基金项目(No.50604011)资助。

Abstract:

The force acted on the liquid drops of the vertical wellbore is different from that of the horizontal wellbore. The Turner formula and its modified pattern deduced using the liquid drop mass point method for calculating the critical flow rate of carrying liquid in the vertical wellbore are not suitable for the horizontal gas well. According to the mass point method for horizontal wellbore, the equation for calculating the critical flow rate of carrying liquid in horizontal gas well was obtained. The critical flow rate of carrying liquid calculated by the equation was compared with the calculated result using the gas-liquid two-phase flow pattern mechanics of horizontal pipe. The results show that the critical flow rate of carrying liquid calculated by the mass point method is more optimistic than that by gas-liquid two-phase flow pattern mechanics. The flow pattern of carrying liquid just located at the transition region between annulus and mist flow. So, in the practical calculation, the calculation result by the mass point analytic method can be adjusted according to the practical situation in a certain area.

Key words: gas reservoir, horizontal well, critical flow rate of carrying liquid, critical velocity, gas-liquid two-phase flow pattern, mass point method

摘要:

液滴在水平井筒中的受力情况与垂直井筒中截然不同,根据垂直井筒中质点力学分析获得的计算气井携液临界流量的Turner公式及其修正式不再适用于水平井。根据水平井筒内液滴质点分析理论,推导出水平气井的携液临界流量公式。与水平管气液两相流态机理计算得到的携液临界流量结果的对比结果表明,用质点分析理论计算得到的携液临界流量比气液两相流态机理计算结果要偏于乐观,且其流态正处于环状流和雾状流的过渡区。因此,在实际应用中,用质点分析理论计算的结果可根据生产井实际情况在一定范围内进行调整。

关键词: 气藏, 水平井, 携液临界流量, 临界速度, 气液两相流态, 质点分析理论