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Gelation Behavior Study of a Resorcinol–Hexamethyleneteramine Crosslinked Polymer Gel for Water Shut-Off Treatment in Low Temperature and High Salinity Reservoirs

Author

Listed:
  • Yongpeng Sun

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Yanchao Fang

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Ang Chen

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Qing You

    (School of Energy Resources, China University of Geosciences, Beijing 100083, China)

  • Caili Dai

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Rui Cheng

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Yifei Liu

    (School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

Abstract

Mature oilfields usually encounter the problem of high watercut. It is practical to use chemical methods for water-shutoff in production wells, however conventional water-shutoff agents have problems of long gelation time, low gel strength, and poor stability under low temperature and high salinity conditions. In this work a novel polymer gel for low temperature and high salinity reservoirs was developed. This water-shutoff agent had controllable gelation time, adjustable gel strength and good stability performance. The crosslinking process of this polymer gel was studied by rheological experiments. The process could be divided into an induction period, a fast crosslinking period, and a stable period. Its gelation behaviors were investigated in detail. According to the Gel Strength Code (GSC) and vacuum breakthrough method, the gel strength was displayed in contour maps. The composition of the polymer gel was optimized to 0.25~0.3% YG100 + 0.6~0.9% resorcinol + 0.2~0.4% hexamethylenetetramine (HMTA) + 0.08~0.27% conditioner (oxalic acid). With the concentration increase of the polymer gel and temperature, the decrease of pH, the induction period became shorter and the crosslinking was more efficient, resulting in better stability performance. Various factors of the gelation behavior which have an impact on the crosslinking reaction process were examined. The relationships between each impact factor and the initial crosslinking time were described with mathematical equations.

Suggested Citation

  • Yongpeng Sun & Yanchao Fang & Ang Chen & Qing You & Caili Dai & Rui Cheng & Yifei Liu, 2017. "Gelation Behavior Study of a Resorcinol–Hexamethyleneteramine Crosslinked Polymer Gel for Water Shut-Off Treatment in Low Temperature and High Salinity Reservoirs," Energies, MDPI, vol. 10(7), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:913-:d:103433
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    References listed on IDEAS

    as
    1. Dingwei Zhu & Limin Wei & Biqing Wang & Yujun Feng, 2014. "Aqueous Hybrids of Silica Nanoparticles and Hydrophobically Associating Hydrolyzed Polyacrylamide Used for EOR in High-Temperature and High-Salinity Reservoirs," Energies, MDPI, vol. 7(6), pages 1-14, June.
    2. Huiying Zhong & Weidong Zhang & Jing Fu & Jun Lu & Hongjun Yin, 2017. "The Performance of Polymer Flooding in Heterogeneous Type II Reservoirs—An Experimental and Field Investigation," Energies, MDPI, vol. 10(4), pages 1-19, April.
    3. Aly A. Hamouda & Hossien A. Akhlaghi Amiri, 2014. "Factors Affecting Alkaline Sodium Silicate Gelation for In-Depth Reservoir Profile Modification," Energies, MDPI, vol. 7(2), pages 1-23, January.
    4. Hossein A. Akhlaghi Amiri & Aly A. Hamouda & Alireza Roostaei, 2014. "Sodium Silicate Behavior in Porous Media Applied for In-Depth Profile Modifications," Energies, MDPI, vol. 7(4), pages 1-23, March.
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