石油学报 ›› 2024, Vol. 45 ›› Issue (11): 1680-1689.DOI: 10.7623/syxb202411009

• 石油工程 • 上一篇    

考虑相间传质的全瞬态井筒气液两相流模型

杨宏伟1, 李军1,2, 张辉1, 张更1, 邢星3   

  1. 1. 中国石油大学(北京)石油工程学院 北京 102249;
    2. 中国石油大学(北京)克拉玛依校区石油学院 新疆克拉玛依 834000;
    3. 中国石油青海油田公司钻采工艺研究院 甘肃敦煌 736202
  • 收稿日期:2024-01-01 修回日期:2024-09-07 发布日期:2024-12-03
  • 通讯作者: 李军,男,1971年4月生,2005年获中国石油大学(北京)博士学位,现为中国石油大学(北京)石油工程学院教授、博士生导师,主要从事钻井新技术、井筒完整性等方面研究。Email:lijun446@vip.163.com
  • 作者简介:杨宏伟,男,1990年2月生,2020年获中国石油大学(北京)博士学位,现为中国石油大学(北京)副教授,主要从事控压钻井、智能井控等方面的研究。Email:zerotone@cup.edu.cn
  • 基金资助:
    国家自然科学基金项目(No.52104012,No.52474018,No.52227804,No.U22B2072)、中国石油大学(北京)科研基金项目(2462023BJRC008)和国家重点研发计划项目(2023YFC3009200)资助。

Fully transient wellbore gas-liquid two-phase flow model considering interphase mass transfer

Yang Hongwei1, Li Jun1,2, Zhang Hui1, Zhang Geng1, Xing Xing3   

  1. 1. College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;
    2. Petroleum College, China University of Petroleum(Beijing) at Karamay, Xinjiang Karamay 834000, China;
    3. Drilling and Production Technology Research Institute, PetroChina Qinghai Oilfield Company, Gansu Dunhuang 736202, China
  • Received:2024-01-01 Revised:2024-09-07 Published:2024-12-03

摘要: 基于滑移上升气泡的界面传质理论与气液两相流理论,结合井筒流体与地层间的传热机理,建立了油基钻井液条件下考虑相间传质的全瞬态非等温气液两相流模型,利用O’Bryan气侵实验数据对该模型进行了验证。研究结果表明,地层气体与油基钻井液的相间传质速率相对较慢,气体并不会立即完全溶解于未饱和的油基钻井液中,而是伴随着油基钻井液沿井筒向上流动时逐渐溶解。在相同气侵速率条件下,该模型计算的井筒内自由气体积分数大于以往考虑稳态相间传质的气液两相流模型。气液相间传质速率随着气体浓度和流体流速的增加而增大。该模型突破了以往基于稳态相间传质的井筒多相流模型的缺陷,能够更准确地描述油基钻井液中气液两相流动规律。

关键词: 气液两相流, 相间传质, 气泡水力学, 油基钻井液, 气侵

Abstract: Based on the interfacial mass transfer theory of slip-rising bubbles and the gas-liquid two-phase flow theory, in combination with the heat transfer mechanism between wellbore fluid and formation, the paper establishes a fully transient and non-isothermal gas-liquid two-phase flow model considering the interphase mass transfer in oil-based drilling fluid, and the model is verified by O’Bryan’s gas kick experiment data. The research results show that the interphase mass transfer rate between formation gas and oil-based drilling fluid is relatively slow, so that the gas will not be completely dissolved in the unsaturated oil-based drilling fluid immediately, and will be gradually dissolved as the oil-based drilling fluid flows upward along the wellbore. At the same gas kick rate, the volume fraction of the free gas in the wellbore calculated by the above model is slightly larger than that of the previous gas-liquid two-phase flow model considering stable interphase mass transfer. Moreover, the gas-fluid interphase mass transfer rate is increased with the increasing of gas concentration and fluid flow rate. In addition, this model breaks the shortcomings of the previous wellbore multiphase flow model based on stable interphase mass transfer, which can more accurately describe the law of gas-fluid phase flow in oil-based drilling fluid.

Key words: gas-liquid phase flow, interphase mass transfer, bubble hydraulics, oil-based drilling fluid, gas kick

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