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Reservoir Condition Pore-scale Imaging of Multiple Fluid Phases Using X-ray Microtomography
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Microscale heterogeneous pore occupancy with variable background resistance.

Oliver McRae1, T S Ramakrishnan2, James C Bird1

  • 1Dept. of Mechanical Engineering, Boston University, Boston, MA 02215, United States.

Journal of Colloid and Interface Science
|November 8, 2021
PubMed
Summary
This summary is machine-generated.

Pore doublet models accurately predict fluid flow in large pores but fail in smaller, natural media pores. Complex flow near fluid interfaces impacts fluid occupancy, especially in low aspect-ratio pores.

Keywords:
Interfacial dynamicsPore doubletPorous mediaResidual fluid

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Area of Science:

  • Physics
  • Fluid Dynamics
  • Geophysics

Background:

  • Fluid flow in porous media involves immiscible fluid displacement.
  • Pore doublet models use hydraulic circuit theory, considering capillarity and viscosity.
  • These models neglect complex flow at fluid interfaces, limiting accuracy for low aspect-ratio pores.

Purpose of the Study:

  • To investigate the accuracy of pore doublet models for varying pore aspect ratios.
  • To quantify the impact of complex interfacial flow on fluid occupancy.
  • To determine the suitability of pore doublet models for simulating residual oil trapping in reservoirs.

Main Methods:

  • Numerical simulations of fluid flow through pore doublet models.
  • Analysis of fluid flow dynamics at the interface of immiscible fluids.
  • Quantification of energy dissipation rates related to interfacial flow.

Main Results:

  • Pore doublet models accurately predict flow for large aspect ratios.
  • Model accuracy breaks down as pore aspect ratio approaches unity.
  • Complex flow effects, linked to energy dissipation, influence final fluid occupancy.

Conclusions:

  • Traditional pore doublet models are insufficient for low aspect-ratio pores found in natural media.
  • Minimal 1D pore doublet models may suffice for global dynamics like residual oil trapping.
  • Understanding interfacial flow is crucial for accurate porous media simulations.