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针对目前涡流工具排水采气工艺设计理论缺乏、现场应用主要凭经验等问题,基于相似理论,建立了气井生产模拟实验装置,实验研究了涡流工具的作用机理,评价了其应用效果,分析了气井井筒中加装涡流工具后对井筒内流体的流型、气体携液量、井筒内压降以及临界携液流量的影响。实验表明,气井井筒加装涡流工具后能够有效提高气井的携液能力,相同气量下平均提高携液量23%,平均降低井筒内流体压降18%,降低临界携液流量20%;通过涡流工具携液机理分析,并与实验结果进行对比验证,提出能够有效应用于涡流工具生产过程的临界携液流量计算公式,为涡流工具有效解决气井积液提供技术支持。
In view of the current theory of design of drainage and gas production technology for eddy current tools and field application mainly based on experience and so on, based on the similarity theory, a gas well production simulation experimental device was set up, the mechanism of the eddy current tool was experimentally studied, its application effect was evaluated, The influence of eddy current tools on the flow pattern, gas carrying capacity, pressure drop in the wellbore and critical liquid carrying capacity after the wellbore is installed in the wellbore. Experiments show that the addition of a vortex tool to the gas well can effectively increase the liquid carrying capacity of the gas well. The same gas volume increases the liquid carrying capacity by 23% on average, reduces the fluid pressure drop in the wellbore by 18% on average and decreases the critical liquid carrying capacity by 20% The mechanism of liquid carrying in the tool is analyzed and compared with the experimental results. The formula of the critical liquid carrying capacity which can be effectively applied in the production process of the vortex tool is proposed to provide technical support for the vortex tool to effectively solve the gas well effusion.