Molecular Insights into Asphaltene Aggregation in Gas Flooding
Molecular Insights into Asphaltene Aggregation in Gas Flooding
复制标题
气驱中沥青质聚集的分子洞察
DOI：
10.1021/acs.energyfuels.1c03004
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发表时间：
2021-12
期刊：
影响因子：
5.3
通讯作者：
Zhang Jun
中科院分区：
文献类型：
--
作者：
Li Zhen;Gong Ke;Wang Junfeng;Hao Yujian;Yan Youguo;Zhang Jun
气体驱油技术在稠油开采中得到了很好的发展和广泛的应用。注入超临界气体提取轻质油组分会破坏稳定的沥青质胶体结构，导致沥青质聚集沉淀，严重威胁储层渗透率和井筒安全。采用分子动力学模拟方法，研究了气驱过程中沥青质的聚集行为。采用CO2、CH4和C3H8三种注入气体，在350、410和470 K三种温度下，研究了注入气体种类和温度对沥青质聚集的影响。模拟结果表明，CO2驱油过程中沥青质聚集程度较高，且随着温度的降低而增加。此外，还对沥青质的空间结构和分子间相互作用进行了讨论，揭示了沥青质聚集的机理。该研究揭示了不同温度下气驱过程中沥青质聚集的分子水平规律，为今后控制气驱过程中沥青质沉淀的研究奠定了基础。
The gas flooding has been well developed and been widely used for heavy oil recovery. The extraction of light oil components by injecting gas with supercritical properties could destroy the stable asphaltene colloidal structure and induce asphaltene aggregation and precipitation, which greatly threatens reservoir permeability and wellbore safety. In this work, employing molecular dynamic simulations, the asphaltene aggregation behavior in gas flooding was investigated. Three kinds of injecting gases, CO2, CH4, and C3H8, and three temperatures at 350, 410, and 470 K were adopted to study the effects of injecting gas types and temperature on asphaltene aggregation. Simulation results indicate that the asphaltene aggregation degree is high in CO2flooding, and it increases with decreasing temperature. Furthermore, the spatial structure and intermolecular interaction were discussed to unveil the underlying mechanism of asphaltene aggregation. This work reveals molecular-level insights of asphaltene aggregation in gas flooding under different temperature, which is expected to facilitate future studies on controlling asphaltene precipitation in gas flooding.
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影响因子：
2.5
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1007/s13202-020-00955-9
发表时间：
2020-07
影响因子：
2.2
作者：
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通讯作者：
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