| Peer-Reviewed

Research of New Demulsifier in Bohai Oilfield

Received: 7 July 2021     Accepted: 22 July 2021     Published: 2 August 2021
Views:       Downloads:
Abstract

The content of asphalt in an EOR oilfield of Bohai is high, reaching more than 30%, and the content of phenol and naphthenic acid is also high, resulting in high acid value of crude oil. The water content is about 85% - 95%, and it is in the later stage of mining. Because hydrophobically associating PAM is used as oil displacement agent in the platform, it is difficult to degrade and seriously affects the demulsifier. The oil-water interfacial film formed by polymer, gum and asphalt is very firm, which increases the difficulty of dehydration. There is no ideal product in the selection and application of reverse demulsifier for heavy crude oil with high content of asphalt, high water content and high acid value. In this experiment, triethanolamine was selected as the starting agent from the aspect of branching and introducing nitrogen element, and water-soluble triblock polyether was synthesized according to the ratio of PO: EO: PO=2:7:6, and then crosslinked with 3% (relative polyether mass) epichlorohydrin. In the process, the crosslinking temperature was 80°C, the reaction time was 5h, and potassium hydroxide solution was used as catalyst. At last, the demulsifier product with good effect of clear water was made, and good effect was obtained in field application.

Published in International Journal of Oil, Gas and Coal Engineering (Volume 9, Issue 3)
DOI 10.11648/j.ogce.20210903.12
Page(s) 42-45
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Triethanolamine, Demulsifier, Epichlorohydrin, Polyether, Heavy Oil

References
[1] MA Lingling. Development of crude oil demulsifier at home and abroad [J]. Chemical Technology Market, 2010, 33 (2): 6-9.
[2] HU Yuguo. The application situation and development trends of demulsifier for crude oil [J]. Jing xi Yu Zhuan Yong Hua Xue Pin, 2000, 5: 13-14.
[3] LIU Liping. Research, application and development of demulsifier for crude oil [J]. Research and Development, 2017, 33 (11): 168-169.
[4] WU Lichun, LIU Songtao, LIU Xuejuan. Current situation of the development of crude oil demulsifier [J]. Detergent & Cosmetics, 2008, 311 (11): 8-10.
[5] CHENG Yunxia, HE San, MENG Di et al. Study on dehydration technology of heavy oil containing polymer in SZ36-1 oilfield [J]. Petrochemical industry application, 2013, 32 (10): 77-80.
[6] ZHENG Jilong, SONG Zhixue, CHEN Ping et al. Selection and performance evaluation on foam systems for nitrogen foam flooding in oilfield SZ36-1 [J]. Advances in Fine Petrochemicals, 2013, 14 (4): 34-36.
[7] TAN Guorong, WANG Jinben. Preparation and performance of demulsifier TKQ-2 for crude oil emulsion by polymer flooding [J]. Chemical Engineering of Oil & Gas, 2008, 37 (1): 56-58.
[8] XU Hui, WEI Qing, ZHANG Lifeng et al. Synthesis and properties of hyperbranched polymer reverse demulsifier [J]. Specialty Petrochemicals, 2019, 36 (3): 46-49.
[9] WANG Zhong, WU Weilong, WANG Mingxian et al. Synthesis and properties of acrylic modified polyether crude oil demusifier [J]. Journal of Shihezi Universithy, 2018, 36 (2): 183-188.
[10] WANG Zhong, LI Danyang. Synthesis and properties of silicone modified polyether OF-125 crude oil demulsifier [J]. Journal of Shihezi Universithy, 2019, 37 (3): 273-279.
[11] WEI Qing, TENG Houkai. Synthesis and performance evaluation of anionic reversed demulsification purifying agent [J]. Industrial Water Treatment, 2019, 39 (8): 52-55.
[12] ZENG Haojian. Study on the synthesis and demulsification of phenol-amine resin block polyether based on bisphenol A [J]. China Surfactant Detergent & Cosmetics, 2020, 50 (12): 833-841.
[13] Q/HS 2020-2004 «Quality inspection method of crude oil demulsifier» [S]. CNOOC Bohai oil production engineering technical service company, 2004. 10.
[14] SY/T 5797-93 «Performance evaluation method of oil in water emulsion demulsifier» [S]. China National Petroleum Corporation, 1993.9.
[15] SY/T 5796-93 «Evaluation method of flocculant» [S]. China National Petroleum Corporation, 1994. 3.
Cite This Article
  • APA Style

    Ren Yi, Dai Hongcheng, Du Dawei, Cheng Yan, Zhang Liya. (2021). Research of New Demulsifier in Bohai Oilfield. International Journal of Oil, Gas and Coal Engineering, 9(3), 42-45. https://doi.org/10.11648/j.ogce.20210903.12

    Copy | Download

    ACS Style

    Ren Yi; Dai Hongcheng; Du Dawei; Cheng Yan; Zhang Liya. Research of New Demulsifier in Bohai Oilfield. Int. J. Oil Gas Coal Eng. 2021, 9(3), 42-45. doi: 10.11648/j.ogce.20210903.12

    Copy | Download

    AMA Style

    Ren Yi, Dai Hongcheng, Du Dawei, Cheng Yan, Zhang Liya. Research of New Demulsifier in Bohai Oilfield. Int J Oil Gas Coal Eng. 2021;9(3):42-45. doi: 10.11648/j.ogce.20210903.12

    Copy | Download

  • @article{10.11648/j.ogce.20210903.12,
      author = {Ren Yi and Dai Hongcheng and Du Dawei and Cheng Yan and Zhang Liya},
      title = {Research of New Demulsifier in Bohai Oilfield},
      journal = {International Journal of Oil, Gas and Coal Engineering},
      volume = {9},
      number = {3},
      pages = {42-45},
      doi = {10.11648/j.ogce.20210903.12},
      url = {https://doi.org/10.11648/j.ogce.20210903.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20210903.12},
      abstract = {The content of asphalt in an EOR oilfield of Bohai is high, reaching more than 30%, and the content of phenol and naphthenic acid is also high, resulting in high acid value of crude oil. The water content is about 85% - 95%, and it is in the later stage of mining. Because hydrophobically associating PAM is used as oil displacement agent in the platform, it is difficult to degrade and seriously affects the demulsifier. The oil-water interfacial film formed by polymer, gum and asphalt is very firm, which increases the difficulty of dehydration. There is no ideal product in the selection and application of reverse demulsifier for heavy crude oil with high content of asphalt, high water content and high acid value. In this experiment, triethanolamine was selected as the starting agent from the aspect of branching and introducing nitrogen element, and water-soluble triblock polyether was synthesized according to the ratio of PO: EO: PO=2:7:6, and then crosslinked with 3% (relative polyether mass) epichlorohydrin. In the process, the crosslinking temperature was 80°C, the reaction time was 5h, and potassium hydroxide solution was used as catalyst. At last, the demulsifier product with good effect of clear water was made, and good effect was obtained in field application.},
     year = {2021}
    }
    

    Copy | Download

  • TY  - JOUR
    T1  - Research of New Demulsifier in Bohai Oilfield
    AU  - Ren Yi
    AU  - Dai Hongcheng
    AU  - Du Dawei
    AU  - Cheng Yan
    AU  - Zhang Liya
    Y1  - 2021/08/02
    PY  - 2021
    N1  - https://doi.org/10.11648/j.ogce.20210903.12
    DO  - 10.11648/j.ogce.20210903.12
    T2  - International Journal of Oil, Gas and Coal Engineering
    JF  - International Journal of Oil, Gas and Coal Engineering
    JO  - International Journal of Oil, Gas and Coal Engineering
    SP  - 42
    EP  - 45
    PB  - Science Publishing Group
    SN  - 2376-7677
    UR  - https://doi.org/10.11648/j.ogce.20210903.12
    AB  - The content of asphalt in an EOR oilfield of Bohai is high, reaching more than 30%, and the content of phenol and naphthenic acid is also high, resulting in high acid value of crude oil. The water content is about 85% - 95%, and it is in the later stage of mining. Because hydrophobically associating PAM is used as oil displacement agent in the platform, it is difficult to degrade and seriously affects the demulsifier. The oil-water interfacial film formed by polymer, gum and asphalt is very firm, which increases the difficulty of dehydration. There is no ideal product in the selection and application of reverse demulsifier for heavy crude oil with high content of asphalt, high water content and high acid value. In this experiment, triethanolamine was selected as the starting agent from the aspect of branching and introducing nitrogen element, and water-soluble triblock polyether was synthesized according to the ratio of PO: EO: PO=2:7:6, and then crosslinked with 3% (relative polyether mass) epichlorohydrin. In the process, the crosslinking temperature was 80°C, the reaction time was 5h, and potassium hydroxide solution was used as catalyst. At last, the demulsifier product with good effect of clear water was made, and good effect was obtained in field application.
    VL  - 9
    IS  - 3
    ER  - 

    Copy | Download

Author Information
  • CNOOC Energy Technology-Drilling & Production Co., Tianjin, China

  • CNOOC Energy Technology-Drilling & Production Co., Tianjin, China

  • CNOOC Energy Technology-Drilling & Production Co., Tianjin, China

  • CNOOC Energy Technology-Drilling & Production Co., Tianjin, China

  • CNOOC Energy Technology-Drilling & Production Co., Tianjin, China

  • Sections