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Steam Cavity Expansion Model for Steam Flooding in Deep Heavy Oil Reservoirs

Author

Listed:
  • Lina Zhang

    (Research Institute of Exploration & Production, Sinopec East China Oil & Gas Company, Nanjing 210000, China)

  • Dianfa Du

    (Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, Qingdao 266580, China
    College of Petroleum Engineering, China University of Petroleum, Qingdao 266000, China)

  • Yaozu Zhang

    (Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, Qingdao 266580, China
    College of Petroleum Engineering, China University of Petroleum, Qingdao 266000, China)

  • Xin Liu

    (Institute of Engineering Technology, Sinopec East China Oil & Gas Company, Nanjing 210000, China)

  • Jingang Fu

    (College of Petroleum Engineering, China University of Petroleum, Qingdao 266000, China
    Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada)

  • Yuan Li

    (Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, Qingdao 266580, China
    College of Petroleum Engineering, China University of Petroleum, Qingdao 266000, China)

  • Jianhua Ren

    (Research Institute of Exploration & Production, Sinopec East China Oil & Gas Company, Nanjing 210000, China)

Abstract

Steam flooding is crucial for the development of heavy oil reservoirs, and the development of the steam cavity significantly determines the efficiency of steam flooding. Previous studies have elucidated the concept of steam overburden and pseudomobility ratio; however, the thermal energy loss in deep heavy oil reservoirs during steam injection needs further investigation. Therefore, in this study, the vapour–liquid interface theory and mathematical integration were used to establish a steam cavity expansion model. The wellbore heat loss rate coefficient, steam overlay, and pseudomobility ratio were used to accurately describe the development of the steam cavity in deep heavy oil reservoirs. The proposed model was experimentally validated, and it was observed that the model could accurately reflect the actual mine conditions. In addition, the pressure gradient distribution of the steam belt and the heat dissipation areas of the top and bottom layers of the steam cavity were evaluated. The results showed that the influence of the wellbore heat loss rate coefficient on the pressure gradient of the oil layer was primarily in the range of 5–20 m away from the steam injection well. Furthermore, it was observed that the pseudomobility ratio is inversely proportional to the development of the steam cavity. As the wellbore heat loss rate coefficient increased, the wellbore heat loss increased. The larger the area ratio, the more pronounced the steam overlay phenomenon, and the large area ratio does not meet the development requirements of the steam chamber. The research closely combines theory with production, and the results of this study can help actual mines by providing theoretical support for the development of deep heavy oil reservoirs.

Suggested Citation

  • Lina Zhang & Dianfa Du & Yaozu Zhang & Xin Liu & Jingang Fu & Yuan Li & Jianhua Ren, 2022. "Steam Cavity Expansion Model for Steam Flooding in Deep Heavy Oil Reservoirs," Energies, MDPI, vol. 15(13), pages 1-15, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:13:p:4816-:d:853239
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    References listed on IDEAS

    as
    1. Khansari, Zeinab & Kapadia, Punitkumar & Mahinpey, Nader & Gates, Ian D., 2014. "A new reaction model for low temperature oxidation of heavy oil: Experiments and numerical modeling," Energy, Elsevier, vol. 64(C), pages 419-428.
    2. Pang, Zhanxi & Wang, Luting & Yin, Fanghao & Lyu, Xiaocong, 2021. "Steam chamber expanding processes and bottom water invading characteristics during steam flooding in heavy oil reservoirs," Energy, Elsevier, vol. 234(C).
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