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Experimental analysis and theoretical modeling of high liquid viscosity two-phase upward vertical pipe flow.

机译：高液体粘度两相向上垂直管流的实验分析和理论模型。

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摘要

The effect of high oil viscosity on upward two-phase gas-oil flow behavior in vertical pipes was experimentally and theoretically studied. A total of 149 air-high viscosity oil and 21 air-water experiments were conducted in a 50.8 mm ID vertical pipe. Six different oil viscosities, namely, 586, 401, 287, 213, 162, and 127 mPa·s, were used. The superficial liquid and gas velocities were varied from 0.05 m/s to 0.7 m/s and from 0.5 m/s to 5 m/s, respectively.;Flow pattern, pressure gradient, average liquid holdup, translational velocity, slug liquid holdup, slug frequency, and slug length were measured and analyzed in this study. Moreover, an experimental facility analysis and a theoretical investigation on observed positive pressure gradient region were conducted. The investigation showed that the positive frictional pressure gradient phenomena can exists for low gas and liquid velocities in upward two-phase vertical flow without violating the second law of thermodynamics.;The experimental results were also used to evaluate different flow pattern maps, mechanistic models, and correlations for two-phase flow and slug characterization. Significant discrepancies between experimental and predicted results were observed for pressure gradient, slug frequency, and average slug length.;A new slug liquid holdup closure model was developed for high viscosity liquid upward two-phase vertical flow. The model is a function of the Froude number and inverse viscosity number. The proposed model was validated against independent experimental data, and showed very small errors for high viscosity. The proposed model showed better performance than the existing models for high viscosity upward vertical flow.;Based on a dimensionless analysis approach, a new slug frequency closure model was presented for high viscosity liquid upward two-phase vertical flow. The model is a function of Froude number and viscosity number. Using the experimental data, the proposed model showed significant improvement in prediction for high viscosity.
机译：实验和理论研究了高油粘度对垂直管中向上的两相气-油流动行为的影响。在50.8 mm内径的垂直管中进行了总共149种空气-高粘度油和21个空气-水实验。使用了六种不同的油粘度，分别为586、401、287、213、162和127 mPa·s。表观液体和气体速度分别从0.05 m / s到0.7 m / s和0.5 m / s到5 m / s改变;流型，压力梯度，平均液体滞留率，平移速度，段塞液体滞留率，在本研究中测量并分析了段塞频率和段塞长度。此外，对观察到的正压梯度区域进行了实验设备分析和理论研究。研究表明，在不违反热力学第二定律的情况下，向上两相垂直流中低气体和液体速度可能存在正摩擦压力梯度现象;实验结果还用于评估不同的流型图，机理模型，以及两相流和段塞表征的相关性。观察到压力梯度，段塞频率和平均段塞长度之间的实验结果与预测结果之间存在显着差异。；针对高粘度液体向上两相垂直流，建立了一个新段塞液体滞留封闭模型。该模型是弗洛德数和反粘度数的函数。所提出的模型针对独立的实验数据进行了验证，并且显示出高粘度的很小误差。提出的模型在高黏度向上垂直流动方面表现出比现有模型更好的性能。基于无量纲分析方法，提出了一种新的段塞频率闭合模型，用于高黏度液体向上垂直流动。该模型是弗洛德数和粘度数的函数。使用实验数据，提出的模型显示出对高粘度预测的显着改善。

著录项

  • 作者

    Alruhaimani, Feras A. S.;

  • 作者单位

    The University of Tulsa.;

  • 授予单位 The University of Tulsa.;
  • 学科 Petroleum engineering.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 339 p.
  • 总页数 339
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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