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Effect of Wettability on Carbon Dioxide Extraction of Crude Oil Components
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Yin-qing LIU1, Yue-qi WANG1, *, Wen-guo MA1, Rui-xin YANG2, Wen-hang YUAN1, Xuan LIU1
Science Technology and Engineering | 2025, 25(15) : 6297 - 6303
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Science Technology and Engineering | 2025, 25(15): 6297-6303
• Papers·Petroleum and Natural Gas Industry •
Effect of Wettability on Carbon Dioxide Extraction of Crude Oil Components
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Yin-qing LIU1, Yue-qi WANG1, *, Wen-guo MA1, Rui-xin YANG2, Wen-hang YUAN1, Xuan LIU1
Affiliations
  • 1 School of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China
  • 2 Dongsheng Petroleum Development Group Company Ltd., Shengli Oilfield, Sinopec, Dongying 257000, China
Published: 2025-05-28 doi: 10.12404/j.issn.1671-1815.2406035
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The silica with the highest content in sandstone was taken as the main research object. The SiO2 surfaces underwent hydroxyl (—OH) and methyl (—CH3) treatments to represent the hydrophilic and hydrophobic walls, respectively. LAMMPS software was utilized to implement molecular dynamics simulations and replicate the process of supercritical CO2 extraction of crude oil components. The results indicate that the temperature is 333.15 K and the pressure is 20 MPa. The hydroxylated silica surface extracted 5.07% more saturated hydrocarbon molecules using supercritical CO2 compared to the methylated silica surface. The interaction energy between the oil components and the two wall surfaces is mutually attractive. The interaction energy of saturated hydrocarbon molecules decreases by 77.52% for hydroxylated silica surface and 46.04% for methylated silica surface, respectively. Additionally, the interaction energy of methylated silica on saturated hydrocarbon is greater than that of the hydroxylated silica surface.It is important to note that carbon dioxide easily extracts saturated hydrocarbons with short molecular chains. The diffusion coefficients of crude oil components under two surface conditions are saturated hydrocarbons > resins > aromatic hydrocarbons > asphaltenes.

supercritical CO2  /  extraction  /  crude oil components  /  molecular dynamics
Yin-qing LIU, Yue-qi WANG, Wen-guo MA, Rui-xin YANG, Wen-hang YUAN, Xuan LIU. Effect of Wettability on Carbon Dioxide Extraction of Crude Oil Components[J]. Science Technology and Engineering, 2025 , 25 (15) : 6297 -6303 . DOI: 10.12404/j.issn.1671-1815.2406035
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Year 2025 volume 25 Issue 15
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doi: 10.12404/j.issn.1671-1815.2406035
  • Receive Date：2024-08-12
  • Online Date：2025-07-09
  • Published：2025-05-28
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  • Received：2024-08-12
  • Revised：2025-01-24
Affiliations
    1 School of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China
    2 Dongsheng Petroleum Development Group Company Ltd., Shengli Oilfield, Sinopec, Dongying 257000, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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