考虑界面张力和液滴变形影响的携液临界流量模型

发布时间：2018-03-18 09:38

本文选题：界面张力　切入点：液滴变形　出处：《石油钻采工艺》2017年02期 　论文类型：期刊论文

【摘要】：现有的携液临界流量模型通常认为界面张力及曳力系数为常数,忽略温度及压力对界面张力、液滴尺寸及液滴变形对曳力系数的影响,造成预测携液临界流量的结果与实际结果有较大差异。为了更准确预测气井携液临界流量,首先通过分段拟合界面张力实验数据,建立界面张力公式,然后引入变形液滴曳力系数公式及液滴变形程度和液滴尺寸之间的关系式,得到考虑界面张力和液滴变形影响的携液临界流量模型。研究结果表明,温度越高,压力越大,界面张力越小,携液临界流量越小;液滴尺寸越大,液滴变形越严重,液滴高宽比越小,曳力系数越大,携液临界流量越小。实验表明,模型预测数据与气井微观液滴积液实验数据基本吻合一致,其准确度远远高于Turner模型和李闽模型。新模型能够更加准确预测不同液滴尺寸下的携液临界流量,符合气田开发规律,为油气田开发提供技术指导。
[Abstract]:The critical liquid carrying flow rate model of existing usually considered interfacial tension and drag coefficient is constant, the temperature and pressure to ignore the interfacial tension, droplet size and droplet deformation effect on the drag coefficient, resulting in prediction of the critical liquid carrying flow rate and the actual results are quite different. In order to more accurately predict the gas well critical liquid carrying flow rate, first of all by fitting the experimental data to establish the interfacial tension, tension formula of interface, and then introduce the deformation of droplet drag coefficient formula and the relation between the degree of deformation of droplet and droplet size, get the critical liquid carrying flow rate model considering the interfacial tension and droplet deformation effects. The results show that the higher the temperature is, the greater the pressure. The lower the interfacial tension, the critical liquid carrying flow rate smaller; droplet size, droplet droplet deformation is serious, the ratio of height to width is small, the drag coefficient increases, the critical liquid carrying flow rate is smaller. It is shown that the model of pre The measured data and the gas micro droplet effusion experimental data consistent, its accuracy is much higher than that of the Turner model and Li Fujian model. The new model can more accurately predict the different droplet size of the critical liquid carrying flow rate, in line with the law of gas field development, to provide technical guidance for the development of oil and gas fields.

【作者单位】：中海石油(中国)有限公司上海分公司研究院;中国石化上海海洋油气分公司勘探开发研究院;
【基金】：国家科技重大专项“东海厚层非均质性大型气田有效开发关键技术”(编号:2016ZX05027-004)
【分类号】：TE319

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