کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1757545 1523014 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of asphaltene and normal paraffins on methane-synthetic oil interfacial tension: An experimental study
ترجمه فارسی عنوان
تأثیر آسفالتین و پارافین های طبیعی بر تنش بین فازهای نفتی مصنوعی متان: یک مطالعه تجربی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی


• Interfacial tension of solutions of toluene/n-paraffin/asphaltene and methane reduced non-linearly with pressure.
• Increase of n-heptane in toluene/n-paraffin/asphaltene solutions caused more accumulation of asphaltene at the interface.
• Asphaltene content in the synthetic solutions would profoundly affect the IFT of solution and methane.
• Correlations was proposed to calculate the IFT of synthetic solutions containing asphaltene at different pressures.
• Correlation was developed to estimate the onset pressure of asphaltene precipitation.

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.The slope of the IFT versus pressure also decreased with increased concentration of n-paraffins in the solution. Accordingly, at high pressures the IFT of solutions containing more n-paraffins was larger. Finally, a correlation was developed to estimate the equilibrium IFT of the methane and n-paraffins based on the explicit functionality of the pressure and n-paraffin concentration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Natural Gas Science and Engineering - Volume 26, September 2015, Pages 538–548
نویسندگان
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