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Predicting heavy oil/water relative permeability using modified Corey-based correlations

机译：使用修正的基于Corey的相关性预测重油/水的相对渗透率

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摘要

In this study, the effect of various parameters such as operating temperature, crude oil viscosity, injection flow rate, and operating pressure on heavy oil/water relative permeability were investigated followed by proposing new correlations for calculating heavy oil/water relative permeability. The experimental results obtained in this study showed that both water and oil relative permeabilities are significantly temperature dependent and they increase when temperature increases. It was also found that relative permeability to oil and water increase with decrease in oil viscosity. Additionally, tests results indicated that increase in injection flow rate results in higher oil relative permeability and lower water relative permeability. Unsteady state core flooding experiments carried out at various operating pressures showed that the relative permeability to oil in heavy oil/water system is independent of operating pressure. The heavy oil/water relative permeability data obtained in this study was used to develop new heavy oil/water relative permeability correlations by modifying the original Corey's correlations. The comparative evaluation of the new correlations with the original Corey's correlations indicated significant improvement in both heavy oil and water relative permeability estimation. Statistical analysis of the results showed that the new correlations facilitate reliable calculation of heavy oil/water relative permeability values by decreasing the root mean square magnitude from 0.167 and 0.178 to 0.004 and 0.061 for water and oil relative permeability, respectively. In addition, the accuracy of newly developed correlations was tested against five sets of experimental data obtained from literature. Results of this comparison also showed that heavy oil/water relative permeability predicted by new correlations is in better agreement with experimental data compared to those predicted by Corey's model. (C) 2015 Elsevier Ltd. All rights reserved.
机译：在这项研究中，研究了诸如工作温度，原油粘度，注入流速和工作压力等各种参数对重油/水相对渗透率的影响，然后提出了用于计算重油/水相对渗透率的新的相关性。在这项研究中获得的实验结果表明，水和油的相对渗透率都与温度显着相关，并且当温度升高时它们会增加。还发现，油和水的相对渗透率随油粘度的降低而增加。另外，测试结果表明，注入流量的增加导致较高的油相对渗透率和较低的水相对渗透率。在各种工作压力下进行的非稳态岩心驱油实验表明，重油/水系统中油的相对渗透率与工作压力无关。本研究中获得的重油/水相对渗透率数据用于通过修改原始Corey的相关关系来开发新的重油/水相对渗透率相关性。对新关联与原始Corey关联的比较评估表明，重油和水的相对渗透率估算均显着改善。结果的统计分析表明，通过将水和油的相对渗透率的均方根值分别从0.167和0.178减小到0.004和0.061，新的相关性有助于重油/水的相对渗透率值的可靠计算。此外，针对从文献中获得的五组实验数据测试了新开发的相关性的准确性。该比较的结果还表明，与新数据相关的预测与Corey模型所预测的相比，重油/水相对渗透率与实验数据更加吻合。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2016年第1期|196-204|共9页
  • 作者

    Torabi Farshid; Mosavat Nader; Zarivnyy Ostap;

  • 作者单位

    Univ Regina, Fac Engn & Appl Sci, Petr Syst Engn, Regina, SK S4S 0A2, Canada;

    Univ Regina, Fac Engn & Appl Sci, Petr Syst Engn, Regina, SK S4S 0A2, Canada|Univ Toronto, Mech & Ind Engn, Toronto, ON, Canada;

    Univ Regina, Fac Engn & Appl Sci, Petr Syst Engn, Regina, SK S4S 0A2, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Heavy oil; Relative permeability; Unsteady state flooding; JBN method; Correlation;

    机译：重油相对渗透率非稳态驱JBN法相关;

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