1887

Abstract

Summary

The underlying physics of three-phase displacements in porous media plays a crucial rule in CO storage processes. A useful step towards a fully understanding of this phenomenon is studying pore occupancy sequences of phase displacements. This is now possible since modern digital rock analysis offers a non-destructive method to view pore occupancies. In this study, a 3D pore network model is used to study pore occupancy sequences of gas injection in two wettability structures (water-wet and oil-wet) at immiscible and near-miscible conditions by applying the extended Bartell-Osterhof theory of van Dijke and Sorbie. Multiple displacements and thermodynamic criteria of oil layer formation and collapse are considered to simulate the full physics of three-phase displacements in capillary dominated systems.

The results show that pore occupancy of gas injection is very similar to the basic theory and depends on the wetting order of the injected phase. For water-wet systems, gas is always the least wetting phase and invades through largest pores under all miscibility conditions, while the situation is different for oil-wet systems as wetting order of the gas changes from the non-wetting to intermediate wetting as miscibility approaches. These findings align closely with pore occupancy sequences observed in micro-CT image experiments.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202521125
2025-10-27
2026-01-19

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References

  1. Al-Dhahli, A., Geiger, S. and van Dijke, M. I. [2013]. Three-phase pore-network modeling for reservoirs with arbitrary wettability. SPE Journal18(02): 285–295.
     [Google Scholar]
  2. Alhosani, A., Bijeljic, B. and Blunt, M. J. [2021]. Pore-scale imaging and analysis of wettability order, trapping and displacement in three-phase flow in porous media with various wettabilities. Transport in Porous Media140(1): 59–84.
     [Google Scholar]
  3. Bartell, F. E. and Osterhof, H. J. [1927]. Determination of the Wettability of a Solid by a Liquid. Industrial & Engineering Chemistry19(11): 1277–1280.
     [Google Scholar]
  4. Mahmoudvand, S., Jiang, Z., Zhou, C., Sorbie, K. S. and Skauge, A. [2025, a]. The immiscible to miscible transition and its consequences for 3-phase displacements in porous media of arbitrary wettability: Comparison of 3D pore network results with basic theory. Colloids and Surfaces A: Physicochemical and Engineering Aspects705: 135673.
     [Google Scholar]
  5. Mahmoudvand, S., Sorbie, K. and Skauge, A. [2025, b]. Effect of the Immiscible to Miscible Transition on 3-Phase Displacements in Systems of Arbitrary Wettability. IOR+ 2025–23rd European Symposium on IOR, European Association of Geoscientists & Engineers.
     [Google Scholar]
  6. Mahmoudvand, S., Sorbie, K. S. and Skauge, A. [2024]. The immiscible to miscible transition and its consequences for 3-phase displacements in porous media of arbitrary wettability: Basic theory. Colloids and Surfaces A: Physicochemical and Engineering Aspects699: 134737.
     [Google Scholar]
  7. van Dijke, M. I. J., Lago, M., Sorbie, K. S. and Araujo, M. [2004]. Free energy balance for three fluid phases in a capillary of arbitrarily shaped cross-section: capillary entry pressures and layers of the intermediate-wetting phase. Journal of Colloid and Interface Science277(1): 184–201.
     [Google Scholar]
  8. van Dijke, M. I. J. and Sorbie, K. S. [2002]. The relation between interfacial tensions and wettability in three-phase systems: consequences for pore occupancy and relative permeability. Journal of petroleum science & engineering.
     [Google Scholar]
/content/papers/10.3997/2214-4609.202521125
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Effect of the Immiscible-to-Miscible Transition on Gas Injection Pore Occupancy in Network Model with Various Wettabilities
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202521125
/content/papers/10.3997/2214-4609.202521125
/content/papers/10.3997/2214-4609.202521125
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