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Influence of Different Redevelopment Measures on Water–Oil Immiscible Displacement and Mechanism Analysis

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  • Le Wang

    (College of Civil Engineering, Xi’an Shiyou University, Xi’an 710065, China)

  • Haowen Wu

    (Downhole Service Corporation, PetroChina Jidong Oilfield Company, Tangshan 063200, China)

  • Zhourong Cao

    (Chengdu Xingrong Environmental Co., Ltd., Chengdu 610040, China)

  • Shijie Fang

    (Operating Area of Luliang Oilfield, Xinjiang Oilfield Company, Karamay 834000, China)

  • Shiyu Duan

    (College of Civil Engineering, Xi’an Shiyou University, Xi’an 710065, China)

  • Yishuo Wang

    (College of Civil Engineering, Xi’an Shiyou University, Xi’an 710065, China)

Abstract

Understanding the two-phase displacement behaviors of oil and water in porous media under different reservoir development modes for enhanced oil recovery is essential. In this paper, the influence of development measures, such as increasing the injection rate, changing the inlet/outlet position, increasing the water viscosity, and reducing the surface tension coefficient, on oil–water dynamic behaviors was studied using a numerical simulation based on the study of the formation of a high-water-cut channel by water flooding at different injection rates. The results show that blockage and restart occur during displacement in the pore–throat channel and during staggered displacement in different pore channels. With an increase in the injection rate, the recovery increases first and then decreases. All the different development measures can increase the swept area and recovery factor. The recovery factor increases significantly by reducing the surface tension coefficient at medium/high injection rates (≥0.01 m/s) and by increasing the viscosity of the water at low injection rates (<0.01 m/s). The numerical simulation study preliminarily revealed the influence of different development measures on displacement behaviors in the pore model. It thus provides theoretical support for understanding the law of oil and water movement in reservoirs.

Suggested Citation

  • Le Wang & Haowen Wu & Zhourong Cao & Shijie Fang & Shiyu Duan & Yishuo Wang, 2023. "Influence of Different Redevelopment Measures on Water–Oil Immiscible Displacement and Mechanism Analysis," Energies, MDPI, vol. 16(13), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:5047-:d:1182725
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    References listed on IDEAS

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    1. Saraf, Shubham & Bera, Achinta, 2021. "A review on pore-scale modeling and CT scan technique to characterize the trapped carbon dioxide in impermeable reservoir rocks during sequestration," Renewable and Sustainable Energy Reviews, Elsevier, vol. 144(C).
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