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首页> 外文期刊>Journal of Petroleum Science & Engineering >A visual investigation of enhanced heavy oil recovery by foam flooding after hot water injection
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A visual investigation of enhanced heavy oil recovery by foam flooding after hot water injection

机译：注入热水后通过泡沫驱提高稠油采收率的可视化研究

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摘要

Hot water flooding is an important method for the development of heavy oil. But due to water channeling and low enthalpy, oil recovery by hot water flooding is very limited. In this paper, a two-dimensional visual experiment is conducted to intuitively study foam flowing characteristics and blocking mechanisms in porous media, as well as the microscopic mechanisms of enhancing heavy oil recovery by foam after hot water flooding. The experiment visually reproduces foam generation in porous media and the processes of hot water flooding and foam flooding. The results show that foam flows along the channels with lower flow resistance in oil layer and can effectively improve the sweep efficiency. Compared with pure hot water flooding, the ultimate sweep efficiency increases from 40.5% to 70.7% after foam injection. Moreover, foam can effectively displace the residual oil caused by hot water flooding. The ultimate oil recovery of thermal foam flooding is 67.54%, 31.30% higher than that of hot water flooding. This paper can provide reference for the study for foam and thermal foam flooding in heavy oil recovery. (C) 2016 Elsevier B.V. All rights reserved.
机译：热水驱是开发重油的重要方法。但是由于导水和低焓，通过热水驱采油的方法非常有限。本文进行了二维视觉实验，直观地研究了多孔介质中的泡沫流动特性和阻塞机理，以及在热水驱后通过泡沫提高稠油采收率的微观机理。该实验从视觉上再现了多孔介质中泡沫的产生以及热水驱和泡沫驱的过程。结果表明，泡沫沿着通道流动，油层中的流动阻力较小，可以有效地提高波及效率。与纯热水驱相比，泡沫注入后的最终清扫效率从40.5％提高到70.7％。而且，泡沫可以有效地置换由于热水驱替所引起的残留油。泡沫热驱的最终采收率为67.54％，比热水驱提高了31.30％。本文可为重油采收中泡沫与热泡沫驱的研究提供参考。 （C）2016 Elsevier B.V.保留所有权利。

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