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He M, Pu WF, Yang X, Su H, Shi T, Shen C, Li X, Wu T, Pang Q. Synergistic Effect of Asphaltene, Resin, and Wax Improving the Emulsification and Interfacial Properties of a High-Phase-Inversion Thin Oil. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:9892-9910. [PMID: 38685830 DOI: 10.1021/acs.langmuir.3c03319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Nowadays, high-phase-inversion in situ emulsification technology has shown great potential in enhancing oil recovery from high-water-cut thin-oil reservoirs. However, emulsification characteristics, interfacial properties, and the mechanism of high phase inversion have not been systematically described. In this study, an emulsification experiment was conducted to investigate the effects of shear time, shear rate, and temperature on the phase inversion of thin oil. Furthermore, the influence of resin and wax on the dispersion of asphaltene was studied through microscopic morphology analysis. Interfacial tension measurement and interfacial viscoelasticity analysis were carried out to determine the interaction characteristics of asphaltene, resin, and wax at the interface. The results showed that, at 50 °C, the phase-inversion point of thin oil reached as high as 75%, and even at 60 °C, it remained at 70%. The shear time and shear rate did not affect the phase-inversion point of thin oil, while an increase in temperature led to a decrease in the phase-inversion point. Moreover, compared to the 20% phase-inversion point of base oil, the phase-inversion point increased with different proportions of asphaltene, resin, and wax. Particularly, at the ratio of asphaltene/resin/wax = 1:5:9, the phase-inversion point reached as high as 80%, indicating the optimal state. In this proportion, asphaltene aggregates exhibited the smallest and most uniform size, best dispersion, lower interfacial tension, and higher interfacial modulus. These findings provide reference and guidance for further enhancing oil recovery in medium-to-high-water-cut thin-oil reservoirs.
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Affiliation(s)
- Meiming He
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
| | - Wan-Fen Pu
- Tianfu Yongxing Laboratory, Chengdu 610213, China
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
- Department of Petroleum Engineering, Kazan Federal University, Kazan 420008, Russia
| | - Xuerui Yang
- Second Oil Production Plant, PetroChina Changqing Oilfield Company, Xi'an 710021, China
| | - Hongze Su
- Yingmai Oil and Gas Production Management Zone, Tarim Oilfield, Korla 841000, China
| | - Tao Shi
- Yingmai Oil and Gas Production Management Zone, Tarim Oilfield, Korla 841000, China
| | - Chao Shen
- Tianfu Yongxing Laboratory, Chengdu 610213, China
| | - Xing Li
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
| | - Tong Wu
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
| | - Qin Pang
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China
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El-Bahnasawi AH, El-Segaey AA, Albohy SAH, El-Azabawy OE, Arafa EI, El-Koly NG, Al-Shafey HI. Evaluation of newly copolymers and their montmorillonite nanocomposite as cold flow improver for petroleum lubricating oil. Sci Rep 2023; 13:14991. [PMID: 37696841 PMCID: PMC10495333 DOI: 10.1038/s41598-023-41802-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 08/31/2023] [Indexed: 09/13/2023] Open
Abstract
The great demand on the energy makes the attention toward modifying lubricating oil. This work tends to prepare the following copolymers; octadecylmethacrylate-co-dodecene (CP1) and octadecylmethacrylate-co-hexadecene (CP2) by free radical solution polymerization using laboratory prepared octadecylmethacrylate monomer with either 1-dodecene or 1-hexadecene. The same monomers also used to prepare their polymers nanocomposite (NP1, NP2) with 1% of nanomontmorolonite by emulsion polymerization. The structures of the prepared polymers and their nanocomposite were elucidated by FTIR, 1HNMR, TGA, DSC, TEM and DLS. These polymers were used as pour point depressant, flow improver and viscosity modifier and showed high efficiency. After comparison of the data of the polymers and their nanocomposite, the nanocomposite give the best results where the pour point decreased from 0 °C to - 18, - 27, - 24 and - 33 °C for CP1, CP2, NP1 and NP2 respectively at the optimum concentration 10,000 ppm. On the other hand the viscosity index increased from 86.57 to 93.25, 92.41, 94.17 and 93.103 for CP1, CP2, NP1 and NP2 respectively, the apparent viscosity increased from 55.863 to 69.31, 119.41, 111.28, and 166.89 cP also the yield stress increased from 652.19 to 1076.3, 1074 and 1480 D/cm2 for CP1, CP2, NP1 and NP2 respectively.
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Affiliation(s)
- Alshaimaa H El-Bahnasawi
- Petroleum Applications Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt
| | - Abeer A El-Segaey
- Petroleum Applications Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt.
| | - Salwa A H Albohy
- Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
| | - Olfat E El-Azabawy
- Petroleum Applications Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt
| | - Enas I Arafa
- Petroleum Applications Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt
| | - Nagda G El-Koly
- Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt
| | - Hussin I Al-Shafey
- Petroleum Applications Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt
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Ren X, Wang X, Jing B, Xiong Y, Duan M, Fang S. Preparation of acrylate-modified cationic flocculant by polymer reaction and its performance in treating oilfield-produced water. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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