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首页> 外文期刊>Journal of natural gas science and engineering >Impact of asphaltene and normal paraffins on methane-synthetic oil interfacial tension: An experimental study
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Impact of asphaltene and normal paraffins on methane-synthetic oil interfacial tension: An experimental study

机译：沥青质和正构烷烃对甲烷合成油界面张力的影响：实验研究

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摘要

In enhanced oil recovery, a successful process of injecting gases such as methane ties profoundly to the presence of detrimental heavy components of crude oil such as asphaltene. This experimental study aimed at investigating parameters that would influence the interfacial tension (IFT) of methane and synthetic oil solutions of toluene and n-paraffins such as n-heptane and n-decane with or without asphaltene. The percentage of asphaltene content was adjusted to 5 wt%. The experimental results showed that the presence of asphaltene, at elevated pressures, caused IFT to decrease non-linearly. At a certain point as pressure increased further then based on surface coverage theory, IFT turned the course indicating the precipitation of asphaltene. This coincided with the increased solubility of methane in the solution while IFT was decreasing. The lower IFT at high pressures also tended to follow a second order decay equation.
机译：在提高石油采收率方面，成功注入天然气（例如甲烷）的过程与原油中有害的重组分（例如沥青质）的存在密切相关。这项实验研究旨在研究会影响甲烷和甲苯和正链烷烃（例如正庚烷和正癸烷，含或不含沥青质）的合成油溶液的界面张力（IFT）的参数。沥青质含量的百分比调整为5重量％。实验结果表明，在高压下沥青质的存在导致IFT非线性下降。然后在一定压力下，然后根据表面覆盖理论进一步提高压力，IFT改变了表明沥青质沉淀的过程。这与IFT降低时甲烷在溶液中的溶解度增加有关。高压下较低的IFT也倾向于遵循二阶衰减方程。

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