摘要
柱塞气举排水采气工艺具有良好的技术经济性,深刻掌握其流体动力学机理与系统规律,是改善其工业应用效果的关键。本文以柱状柱塞及其上部含气液柱为研究对象,通过受力分析建立柱塞气举瞬态泄漏量物理模型;利用有限差分方法实现模型求解;结合室内实验实现模型验证与应用。新模型考虑了柱塞举升过程中的液体泄漏,也考虑了举升液柱含气率的瞬态变化,更贴近实际工况。揭示了柱塞气举过程中举升压差、柱塞上行速度、液体泄漏流量和举升液柱含气率的瞬态变化过程;发现积液液柱含气率随着举升过程逐渐增大;柱塞上行瞬时速度与加速度共同影响液体泄漏,液体泄漏流量随着举升过程先增大后减小。
Plunger lift is an economical artificial lift method to solve the liquid loading problem in gas wells.Because of the inevitable annular gap between plunger and tube wall,the liquid above plunger may leak downward and the gas may slip upward during lifting process.How to quantitatively describe the gas-liquid counter-current flow sealing property is still challenging to optimize the plunger lift method.In this paper,a transient physical model is proposed to discribe the gas-liquid flow sealing during plunger lifting process.The physical model is solved by the finite difference method.Combining the similarity experiments,the proposed transient model is verified qualitatively.Both liquid leakage and gas slippage phenomena are considered in the new model which are common in practice.The transient variations of plunger velocity,liquid leakage and stress conditions during plunger lifting process are investigated theoretically and experimentally.
作者
赵昆鹏
慕立俊
田伟
白博峰
ZHAO Kun-Peng;MU Li-Jun;TIAN Wei;BAI Bo-Feng(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi'an 710049,China;Oil&Gas Technology Institute of Changqing Oilfield Company,Xi'an 710018,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第5期1133-1138,共6页
Journal of Engineering Thermophysics
基金
国家杰出青年科学家基金资助项目(No.51425603)。
关键词
柱塞举升
排水采气
气液逆流
流动密封
plunger lift
drainage gas recovery
countercurrent gas-liquid flow
flow sealing
