盐水 + 二氧化碳 + 油 + 石英系统的界面特性
Yafan Yang1, Arun Kumar Narayanan Nair2, Denvid Lau3
1State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
The Journal of chemical physics
|March 18, 2024
概括
分子动力学模拟揭示了二氧化碳 (CO2) 如何影响石油回收. 二氧化碳影响表面的水行为,这对于优化二氧化碳增强石油回收 (EOR) 注入策略至关重要.
科学领域:
- 计算化学和材料科学计算化学和材料科学
- 石油工程和增强的石油回收.
背景情况:
- 二氧化碳 (CO2) 注入是增强石油回收 (EOR) 的关键技术.
- 了解界面性质对于优化CO2-EOR过程至关重要,特别是在盐水,碳化合物和水库岩石表面的存在下.
研究的目的:
- 通过分子动力学模拟,研究二氧化碳对碳化合物-水-系统的界面特性的影响.
- 为CO2-EOR提供有关水和CO2在水友性和性表面的行为提供见解.
主要方法:
- 用分子动力学 (MD) 模拟来建模各种系统,包括H2O + CO2 + 芳香碳化合物 + 氧化和盐水 + CO2 + + 氧化.
- 接触角度 (CAs) 和粘附张力被计算出来,以量化界面特性.
- 在不同的条件下进行了对表面正常水分布的分析.
主要成果:
- 水友氧化的水接触角度通常随着压力而增加,随着温度而减少,CO2的影响有限.
- 随着二氧化碳的增加,水性石的接触角度增加了,而二氧化碳显著影响了高压下水的分布.
- 盐系统中NaCl度的增加导致了CA的增加,并且在CO2和/或的存在下降了粘合张力.
结论:
- 二氧化碳显著改变了水性氧化表面的水的行为,影响了与EOR相关的界面特性.
- 这些发现为优化CO2-EOR运营中的水交替气体 (WAG) 注入策略提供了关键的见解.
- 模拟数据为了解和提高二氧化碳驱动的石油回收效率提供了基础.
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