摘要
为了促进涡流排水采气工艺在我国的推广应用,开展了涡流工具特性的模拟研究。建立了涡流工具排液过程的数理模型,对涡流工具引发的旋流场进行了模拟研究,获得了不同雷诺数及持液率下的气液螺旋涡流的流场结构及特点,气速对液膜螺旋流的影响规律,螺旋流动强度的变化规律。研究结果表明,涡流工具使气液两相流体调整为类环状流动,井筒中心以连续气柱的形式向上运动,壁面附近的液膜螺旋上升运动,这种流动结构降低了管柱摩阻,提高了气体携液能力。
In order to facilitate the eddy current drainage gas recovery technology being widely used in China, simulation research on eddy current instrument characteristics was carried out. The mathematical model of eddy current tools draining process was estab- lished to study the eddy field triggered by the cyclone of the tools. The simulation figured out the flow field structure and characteristics of gas-liquid spiral vortex flow under different Reynolds numbers and liquid holdup conditions; besides, the influence of gas velocity on liquid membrane spiral flow and variation of spiral flow intensity also obtained from the simulation results. The study had revealed that the gas-liquid two-phase fluid was transformed into kind of annular flow by vortex tools, and the center of the wellbore moved up in a continuous form of gas column accompanied liquid membrane near the wall spiral upward movement. These flow structures reduce string friction and improve gas liquid carrying capacity,
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2013年第6期65-68,共4页
Oil Drilling & Production Technology
基金
中国石油勘探开发研究院科研项目"井下涡流助排技术机理研究及工具研发"(编号:2012Y-049)
关键词
排水采气
涡流工具
紊流
螺旋流
仿真模拟
gas well production with water withdrawal
eddy current
turbulent flow
spiral flow
analogue simulation
