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Related Experiment Video

Updated: Oct 4, 2025

Microfluidic Devices for Characterizing Pore-scale Event Processes in Porous Media for Oil Recovery Applications
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A simulation study on hydrogel performance for enhanced oil recovery using phase-field method.

Seyed Hosein Hayatolgheibi1, Forough Ameli2, Mohammad Reza Moghbeli1

  • 1School of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology, 16846-13114, Tehran, Iran.

Scientific Reports
|February 12, 2022
PubMed
Summary

Hydrogels enhance oil recovery by blocking high-permeability zones, allowing water to sweep trapped oil. This study simulated hydrogel behavior in porous media, validating experimental results with high accuracy.

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Area of Science:

  • Petroleum Engineering
  • Materials Science
  • Chemical Engineering

Background:

  • Hydrogels are utilized in enhanced oil recovery (EOR) to control fluid flow in reservoirs.
  • Injecting hydrogels blocks high-permeability areas, enabling subsequent water flooding to recover trapped oil.

Purpose of the Study:

  • To simulate hydrogel injection for oil recovery using a phase-field approach.
  • To determine model tuning parameters (contact surface thickness, phase transform parameter, excess free energy).
  • To analyze hydrogel diffusion, deformation, and plugging mechanisms and their impact on oil recovery.

Main Methods:

  • Phase-field simulation using a Cahn-Hilliard conservative approach for hydrogel diffusion.
  • Analysis of pressure drop variations in a micromodel to understand hydrogel behavior.
  • Statistical calculation of the oil recovery factor.

Main Results:

  • The simulation achieved good agreement with experimental oil recovery factors (absolute errors of 2.29% for water flooding and 4.06% for hydrogel flooding).
  • Hydrogel diffusion, breakage, deformation, and plugging mechanisms were analyzed.
  • Tuned model parameters were reported: є = 111.7 µm, M₀ = 5 × 10⁻¹³ m³/s, ∧ = 1.2 J/m³.

Conclusions:

  • The phase-field model accurately predicts oil recovery factors in hydrogel-assisted EOR.
  • The study provides insights into hydrogel behavior and effective parameters for optimizing oil recovery processes.