页岩油组分对油水界面性质的影响

doi:10.3969/j.issn.2097-2806.2023.10.004

摘要/Abstract

摘要：

探讨了页岩油组分对油水界面性质的影响，油水界面性质对非常规储层中碳氢化合物的回收和运移起着至关重要的作用。研究考察了页岩油的组分含量变化对油水界面性质的影响，包括饱和分、芳香分、胶质、沥青质和蜡的变化。系统评价了不同组分质量分数下油水界面张力和界面模量，建立了页岩油组成与界面性质之间的相关性。结果表明，沥青质和胶质的存在显著影响油水界面性质，导致界面张力降低，质量分数为1%的沥青质和胶质组分分别可将平衡界面张力降低至22.48 mN/m和19.42 mN/m；沥青质对界面膜的稳定起到主要作用，不同胶质/沥青质（R/A）含量下对界面张力和界面模量大小改善程度不相同；蜡组分没有降低界面张力的能力，但与胶质-沥青质存在协同作用，可提高界面膜的稳定性，降低高胶质/沥青质（R/A）比例下的竞争吸附，当R/A为10时，胶质/沥青质-蜡的平衡界面张力为17.06 mN/m、黏性模量为6.42 mN/m、弹性模量为36.98 mN/m、扩张模量为37.61 mN/m。这些发现为页岩油组成与油水界面性质之间的复杂关系提供了有价值的见解，有助于开发更有效的提高采收率（EOR）技术和更好地理解非常规储层中的多相流动行为。

关键词: 页岩油, 界面张力, 界面模量, 油水界面性质, 提高采收率

Abstract:

The influence of shale oil components on the properties of oil-water interface was discussed. The properties of oil-water interface play an important role in the recovery and migration of hydrocarbons in unconventional reservoirs. The effects of shale oil composition on the properties of oil-water interface were investigated, including the changes of saturates, aromatics, resins, asphaltenes and waxes. The oil-water interfacial tension and interfacial modulus under different mass fractions of components were systematically evaluated, and the correlation between shale oil composition and interfacial properties was established. The results showed that the presence of asphaltene and resin significantly affected the oil-water interfacial properties, resulting in a decrease in interfacial tension. The asphaltene and resin components with mass fraction of 1%, respectively, could reduce the equilibrium interfacial tension to 22.48 mN/m and 19.42 mN/m, respectively. Asphaltene played a major role in the stabilization of the interfacial film, and the improvement of interfacial tension and interfacial modulus was different at different resin/asphaltene （R/A） content. The wax component had no ability to reduce the interfacial tension, but it had synergistic effect with the resin-asphaltene to improve the stability of interfacial film and reduced the competitive adsorption at high resin/asphaltene （R/A） ratio. When R/A was 10, the equilibrium interfacial tension of the resin/asphaltene-wax was 17.06 mN/m, the viscous modulus was 6.42 mN/m, the elastic modulus was 36.98 mN/m, and the expansion modulus was 37.61 mN/m. These findings could provide valuable insights into the complex relationship between shale oil composition and oil-water interface properties, which could help to develop more effective technologies of enhanced oil recovery （EOR） and better understand multiphase flow behavior in unconventional reservoirs.

Key words: shale oil, interface tension, interface modulus, oil-water interface property, enhanced oil recovery

中图分类号:

TE358

史园园, 何凯, 吴文中. 页岩油组分对油水界面性质的影响[J]. 日用化学工业（中英文）, 2023, 53(10): 1140-1146.

Shi Yuanyuan, He Kai, Wu Wenzhong. Effects of shale oil composition on the properties of oil-water interface[J]. China Surfactant Detergent & Cosmetics, 2023, 53(10): 1140-1146.

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组分	含量/%
饱和分	68.49
芳香分	18.21
胶质	13.09
沥青质	0.21
蜡含量	10.86