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arXiv 1708.09510cond-mat.soft
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流动条件下烃链与离子和非离子表面活性剂缔合解吸作为提高石油采收率的机理

Desorption of hydrocarbon chains by association with ionic and nonionic surfactants under flow as a mechanism for enhanced oil recovery

Ketzasmin A. Terrón-Mejía, Roberto López-Rendon, Armando Gama Goicochea

摘要:

从嵌入岩石表面的油井中提取石油的需求导致了新的和改进的强化采油技术的发展。其中之一是将表面活性剂与水蒸气一起注入,这促进了石油的解吸,然后可以使用泵提取,因为表面活性剂将石油封装在泡沫中。然而,导致石油的最佳解吸的机制和进行解吸的最佳类型的表面活性剂还不为人所知,这保证了需要在这一主题上进行基础研究。在这项工作中,我们报告的非平衡耗散粒子动力学模拟模型表面活性剂和油分子吸附在表面上,与研究的表面活性剂的效率解吸碳氢化合物链,发现吸附在平坦的表面上的目的。研究的模型表面活性剂对应于非离子和阳离子表面活性剂,和烃解吸研究作为表面活性剂浓度的函数下增加Poilluille流。我们得到各种烃解吸等温线的表面活性剂提出的每一个模型,在流动。非离子表面活性剂被认为是最有效的解吸油和机制,导致这种现象的介绍和讨论。

英文摘要:

The need to extract oil from wells where it is embedded on the surfaces of rocks has led to the development of new and improved enhanced oil recovery techniques. One of those is the injection of surfactants with water vapor, which promotes desorption of oil that can then be extracted using pumps, as the surfactants encapsulate the oil in foams. However, the mechanisms that lead to the optimal desorption of oil and the best type of surfactants to carry out desorption are not well known yet, which warrants the need to carry out basic research on this topic. In this work, we report non equilibrium dissipative particle dynamics simulations of model surfactants and oil molecules adsorbed on surfaces, with the purpose of studying the efficiency of the surfactants to desorb hydrocarbon chains, that are found adsorbed over flat surfaces. The model surfactants studied correspond to nonionic and cationic surfactants, and the hydrocarbon desorption is studied as a function of surfactant concentration under increasing Poiseuille flow. We obtain various hydrocarbon desorption isotherms for every model of surfactant proposed, under flow. Nonionic surfactants are found to be the most effective to desorb oil and the mechanisms that lead to this phenomenon are presented and discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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