Stability influence factors and mechanism of produced emulsion from CO2 flooding
| Autor: | Korobov Grigory Yurievich, Anqing Xie, Lekomtsev Alexander Viktorovich, Zhe Li, Hongbin Yang, Menglan Li, Xin Kang, Tongyu Zhu, Wanli Kang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Solid particle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics medicine.disease Crude oil 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Salinity Co2 flooding Chemical engineering Oil phase Emulsion Materials Chemistry medicine Enhanced oil recovery Dehydration Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 333:115974 |
| ISSN: | 0167-7322 |
| Popis: | CO2 flooding has been widely applied for enhanced oil recovery (EOR) in recent years, while the difficulty in demulsification of the produced fluid has become an urgent problem due to the specific physical and chemical properties of CO2 flooding process. In this study, the crude oil from Block Hei-59 by CO2 flooding was used to prepare simulated produced emulsions and the influence of CO2 pressure, temperature, salinity, pH and solid particles on the stability of emulsions are investigated. The results indicated that the stability of simulated emulsions gradually increased with CO2 pressure but decreased with the increase of temperature, while the change of NaCl concentration and pH had little effects on the stability of emulsions. Moreover, the solid particles had great influences on the stability of the emulsion, and the emulsion prepared by the particles initially dispersed in the oil phase was more stable than in water. This study can provide a theoretical basis for the future dehydration and demulsification treatment of produced fluids from the formation developed by CO2 flooding. |
| Databáze: | OpenAIRE |
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