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Pore-Scale Simulation of Gas and Water Two-Phase Flow in Rough-Walled Fractures Using the Volume of Fluid Method

Author

Listed:
  • Qingzhong Zhu

    (PetroChina Huabei Oilfield Company, Renqiu 062552, China)

  • Yanhui Yang

    (PetroChina Huabei Oilfield Company, Renqiu 062552, China)

  • Xueying Zhang

    (PetroChina Huabei Oilfield Company, Renqiu 062552, China)

  • Sanshuai Wang

    (PetroChina Huabei Oilfield Company, Renqiu 062552, China)

  • Jinzhao Yang

    (Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Jiyuan Zhang

    (Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Qingdao 266580, China
    School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China)

Abstract

The gas and water flow behavior in rough-walled hydrophilic fractures at the pore scale is crucial for understanding the gas production characteristics of naturally fractured formations. This paper presents a systematic analysis of the gas and water flow characteristics in both the single-fracture and Y-shaped junction fracture models using the volume of fluid (VOF) method. Numerical simulations showed that the gas/water rate ratio is the most significant factor influencing gas bubble/slug geometry, phase distribution, and saturation. The effect of fracture roughness and tortuosity is less significant than the gas/water ratio, whereas the total fluid rate has a negligible effect. For Y-shaped junction models, the phase distribution and referential pathways are predominantly controlled only by the channel aperture ratio, whereas the effect of the intersecting angle and fluid flow rate can be neglected.

Suggested Citation

  • Qingzhong Zhu & Yanhui Yang & Xueying Zhang & Sanshuai Wang & Jinzhao Yang & Jiyuan Zhang, 2022. "Pore-Scale Simulation of Gas and Water Two-Phase Flow in Rough-Walled Fractures Using the Volume of Fluid Method," Energies, MDPI, vol. 15(24), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:24:p:9382-:d:1000312
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    References listed on IDEAS

    as
    1. Jin, Yi & Zheng, Junling & Liu, Xianhe & Pan, Jienan & Liu, Shunxi, 2019. "Control mechanisms of self-affine, rough cleat networks on flow dynamics in coal reservoir," Energy, Elsevier, vol. 189(C).
    2. Suyang Zhu & Alireza Salmachi, 2021. "Flowing Material Balance and Rate-Transient Analysis of Horizontal Wells in Under-Saturated Coal Seam Gas Reservoirs: A Case Study from the Qinshui Basin, China," Energies, MDPI, vol. 14(16), pages 1-24, August.
    3. Jiyuan Zhang & Qihong Feng & Xianmin Zhang & Qiujia Hu & Jiaosheng Yang & Ning Wang, 2020. "A Novel Data-Driven Method to Estimate Methane Adsorption Isotherm on Coals Using the Gradient Boosting Decision Tree: A Case Study in the Qinshui Basin, China," Energies, MDPI, vol. 13(20), pages 1-21, October.
    4. Jiyuan Zhang & Bin Zhang & Shiqian Xu & Qihong Feng & Xianmin Zhang & Derek Elsworth, 2021. "Interpretation of Gas/Water Relative Permeability of Coal Using the Hybrid Bayesian-Assisted History Matching: New Insights," Energies, MDPI, vol. 14(3), pages 1-19, January.
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