气井涡流排液采气工具有效作用长度

发布时间：2018-10-05 09:17

【摘要】：针对目前对涡流工具适用条件和工具有效作用长度认识不清,现场应用与分析主要依据经验,进而影响使用效果等问题,运用Auto CAD和Fluent流体模拟软件,建立涡流工具气液两相流场模型,研究流体旋转强度的衰减规律,预测涡流工具有效作用长度,并分析井筒气液状况和工具结构参数对有效作用长度的影响。研究结果表明:流体旋转强度的衰减规律符合对数递减,以对数递减公式预测的涡流工具有效作用长度介于10~100 m;流体入口速度和井筒气液比是影响工具有效作用长度的主要因素,入口速度和气液比增大,有效作用长度增大;槽宽为60 mm时,工具有效作用长度较大,排液效果较好;减小槽深和工具与油管之间的间隙,流体速度增大,有效作用长度增大。研究结果可为现场涡流工具结构参数优选和排液效果的提高提供理论依据。
[Abstract]:In view of the current unclear understanding of the applicable conditions of eddy current tools and the effective working length of the tools, the field application and analysis are mainly based on experience, thus affecting the application effect. The Auto CAD and Fluent fluid simulation software are used. A gas-liquid two-phase flow field model of eddy current tool is established to study the attenuation law of fluid rotation strength, to predict the effective acting length of eddy current tool, and to analyze the influence of wellbore gas-liquid condition and tool structure parameters on the effective action length. The results show that the attenuation law of fluid rotational strength is in accordance with the logarithmic decline. The effective action length of eddy current tool predicted by logarithmic decline formula is between 10 ~ 100m, the inlet velocity and gas-liquid ratio of wellbore are the main factors affecting the effective working length of the tool, the inlet velocity and gas-liquid ratio increase, and the effective action length increases. When the groove width is 60 mm, the effective working length of the tool is larger and the efflux effect is better, and the fluid velocity increases and the effective action length increases when the groove depth and the gap between the tool and the tubing are reduced. The results can provide a theoretical basis for the optimization of the structure parameters of the eddy current tools and the improvement of the efflux effect.
【作者单位】：中国石油大学(华东)石油工程学院;中海油能源发展股份有限公司工程技术分公司;
【基金】：中海油能源发展股份有限公司科研项目“涡流工具携液影响因素分析”(GC2014ZC2916)
【分类号】：TE377

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