倾斜大管径多相流研究及在电潜泵井中的应用

【作者】 陈来勇；

【导师】 林琪；

【作者基本信息】 西南石油学院 ， 油气田开发工程， 2003， 硕士

【摘要】 油、气、水多相流理论是研究自喷井和人工举升井生产规律的基本理论。生产系统的总压降不仅关系到油井能否自喷，而且决定着用自喷和人工举升方法可能获得的最大产量，应用多相流相关式以预测管路中的压力损失对于石油工业来说是极其重要的。但目前大部分的多相流压力损失预测相关式都是通过不同条件的实验得来的，它们不可能适用于任何条件，在实际运用中，应根据实际情况选择合适的计算模型。 本文对倾斜大管径多相流的研究主要是针对预测海上电泵井中电泵以下套管压力梯度而进行的，主要完成了以下研究工作： (1)基于质量、动量和能量守恒定律及井筒径向传热理论建立了流体压力、温度分布预测数学模型。 (2)剖析了压降预测Beggs&Brill模型，对其持液率和压降计算进行了敏感性分析，以进一步明确其使用范围。分析参数有：倾斜角度、管径大小、气液比和摩阻系数等。 (3)建立了改进的压降预测模型，分别对该模型和Beggs&Brill模型的计算结果进行统计分析，证明改进的方法能适用于倾斜大管径多相流的应用，同时也进一步验证了Beggs&Brill在小管径中的应用效果很好。 (4)结合改进模型和Beggs＆Brill模型，建立了以电潜泵为节点的电潜泵抽油系统基本数学模型。 本文用Visual Basic语言自行研制了电潜泵井生产系统设计软件，利用油井各系统的协调关系，为电潜泵采油的现场参数设计及生产分析提供了手段和依据。更多还原

【Abstract】 Oil, gas and water multiphase flow theory is elementary theory that research production laws of flowing well and artificial lift well. Production system’ overall pressure-drop not only related oil well be able to no flowing, but determined maximum production rate that has been likely to acquired with flowing and artificial lift means, It was vital importance for petroleum industry to apply multiphase flow relational formula to predict pressure-loss in pipelines. But at present most multiphase flow pressure-loss prediction relational formulas have been obtained from different conditional experiment, it was impossible to be the same with any conditions; it should be selected in practice handle according to practical situation.This paper present’ research for multiphase flow in inclined big diameter primarily aims at casing pressure gradient prediction below electric submersible pump, principal done following research work.(1). Based on mass, momentum, energy conservation and the theory of wellbore radius heat transmission, established fluid pressure and temperature distribution prediction mathematical models.(2). Sensitivity analyzes Beggs&Brill model, primarily liquid holdup and pressure-drop in order to confirm in thereof scope of application. Analyses parameter have inclined angle, pipe diameter size, gas liquid ratio and friction factor and so on.(3). Improved pressure-drop prediction model, Respectively statistical analyzed results of this model and Beggs&Brill model, proven improved method could apply to study the multiphase flow in inclined big diameter, simultaneously, more verified the effect of Beggs&Brill method is well when it applied to tubule diameter.(4). Combined improve model and Beggs&Brill model, established electric submersible pump system mathematical model.This paper present oil well each system coordination relation with Visual Basic developmental electric submersible pump production system design software byoneself, supplied instrument and evidence for practicality production更多还原