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Evaluation of the Vertical Producing Degree of Commingled Production via Waterflooding for Multilayer Offshore Heavy Oil Reservoirs

Author

Listed:
  • Fei Shen

    (College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
    Research Institute of Petroleum Exploration and Development, Zhongyuan Oil Field, Sinopec, Zhengzhou 450046, China)

  • Linsong Cheng

    (College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China)

  • Qiang Sun

    (Tianjin Branch of CNOOC Ltd., Tianjin 300452, China)

  • Shijun Huang

    (College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China)

Abstract

Recently, commingling production has been widely used for the development of offshore heavy oil reservoirs with multilayers. However, the differences between layers in terms of reservoir physical properties, oil properties and pressure have always resulted in interlayer interference, which makes it more difficult to evaluate the producing degree of commingled production. Based on the Buckley–Leverett theory, this paper presents two theoretical models, a one-dimensional linear flow model and a planar radial flow model, for water-flooded multilayer reservoirs. Through the models, this paper establishes a dynamic method to evaluate seepage resistance, sweep efficiency and recovery percent and then conducts an analysis with field data. The result indicates the following: (1) the dynamic difference in seepage resistance is an important form of interlayer interference during the commingled production of an offshore multilayer reservoir; (2) the difference between commingled production and separated production is small within a certain range of permeability ratio or viscosity ratio, but separated production should be adopted when the ratio exceeds a certain value.

Suggested Citation

  • Fei Shen & Linsong Cheng & Qiang Sun & Shijun Huang, 2018. "Evaluation of the Vertical Producing Degree of Commingled Production via Waterflooding for Multilayer Offshore Heavy Oil Reservoirs," Energies, MDPI, vol. 11(9), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:9:p:2428-:d:169652
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    Cited by:

    1. Jianchao Cai & Shuyu Sun & Ali Habibi & Zhien Zhang, 2019. "Emerging Advances in Petrophysics: Porous Media Characterization and Modeling of Multiphase Flow," Energies, MDPI, vol. 12(2), pages 1-5, January.
    2. Wei Guo & Zhendong Wang & Youhong Sun & Xiaoshu Lü & Yuan Wang & Sunhua Deng & Qiang Li, 2020. "Effects of Packer Locations on Downhole Electric Heater Performance: Experimental Test and Economic Analysis," Energies, MDPI, vol. 13(2), pages 1-17, January.

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