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Study on micro remaining oil distribution of polymer flooding in Class-II B oil layer of Daqing Oilfield

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Listed:
  • Fang, Yujia
  • Yang, Erlong
  • Guo, Songlin
  • Cui, Changyu
  • Zhou, Congcong

Abstract

During the implementation of chemical flooding, problems of slow decline of water cut and poor development effect appear in Class-II B oil layer of Daqing Oilfield. In this paper, photoetched glass models and micro CT-scanner technology are used for polymer flooding experiment with different molecular weight. Experiment are carried out by parallel displacement method to simulate the effect of interlayer heterogeneity on the residual oil distribution. The results of photoetched glass model displacement experiment show that under the condition of parallel displacement, the enhanced oil recovery of low permeability model is the largest when the molecular weight of polymer solution is 1900 × 104 Da, and the overall displacement efficiency is the best. However, the compatibility between polymer solution with molecular weight of 2500 × 104 Da and low permeability model is poor. The variations in cluster residual oil saturation is lower in low permeability model, whereas other types of residual oils are higher. Micro CT-scanner results show that there is almost no membrane and blind end residual oils after polymer flooding, which validates the low utilization ratio of membrane and blind end residual oils saturation in photoetched glass model.

Suggested Citation

  • Fang, Yujia & Yang, Erlong & Guo, Songlin & Cui, Changyu & Zhou, Congcong, 2022. "Study on micro remaining oil distribution of polymer flooding in Class-II B oil layer of Daqing Oilfield," Energy, Elsevier, vol. 254(PC).
    • Handle: RePEc:eee:energy:v:254:y:2022:i:pc:s0360544222013822
    DOI: 10.1016/j.energy.2022.124479
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    References listed on IDEAS

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    1. Yaohao Guo & Lei Zhang & Guangpu Zhu & Jun Yao & Hai Sun & Wenhui Song & Yongfei Yang & Jianlin Zhao, 2019. "A Pore-Scale Investigation of Residual Oil Distributions and Enhanced Oil Recovery Methods," Energies, MDPI, vol. 12(19), pages 1-16, September.
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    Cited by:

    1. Liu, Yu-Long & Li, Yang & Si, Yin-Fang & Fu, Jian & Dong, Hao & Sun, Shan-Shan & Zhang, Fan & She, Yue-Hui & Zhang, Zhi-Quan, 2023. "Synthesis of nanosilver particles mediated by microbial surfactants and its enhancement of crude oil recovery," Energy, Elsevier, vol. 272(C).
    2. Zhang, Jun, 2023. "Performance of high temperature steam injection in horizontal wells of heavy oil reservoirs," Energy, Elsevier, vol. 282(C).
    3. Li, Jiangtao & Zhou, Xiaofeng & Gayubov, Abdumalik & Shamil, Sultanov, 2023. "Study on production performance characteristics of horizontal wells in low permeability and tight oil reservoirs," Energy, Elsevier, vol. 284(C).
    4. NanJun Lai & Dongdong Wang & Junqi Wang & Lei Tang, 2022. "Synthesis, Optimization, and Characterization of Fluorescent Particle Preformed Gel," Energies, MDPI, vol. 15(22), pages 1-22, November.

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