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Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

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Drainage in a rising foam.

Pavel Yazhgur¹, Emmanuelle Rio, Florence Rouyer

¹Laboratoire de Physique des Solides, CNRS UMR8502 and Univ. Paris-Sud, Université Paris-Saclay, 91405 Orsay Cedex, France. pavel.yazhgur@u-psud.fr.

|November 12, 2015

Summary

This summary is machine-generated.

This study models liquid fraction profiles in rising foams, crucial for stability and rheology. The model accurately predicts profiles using mobile interfaces, even for systems typically showing rigid behavior.

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Area of Science:

Colloid and Surface Science
Fluid Dynamics
Materials Science

Background:

Rising foams are vital in industrial processes like flotation.
Liquid fraction profiles in foams dictate stability and rheology.
Accurate prediction of these profiles is essential for process optimization.

Purpose of the Study:

To develop a predictive model for the liquid fraction profile in rising foams.
To investigate the influence of interface mobility on foam behavior.
To understand the factors governing foam stability and rheology.

Main Methods:

Utilized drift flux analysis.
Incorporated semi-empirical expressions for foam permeability and osmotic pressure.
Developed a model to predict liquid fraction as a function of height.

Main Results:

The model successfully predicts experimental liquid fraction profiles.
Mobile interfaces accurately described all experimental profiles, including those with dodecanol.
Foam behavior in rising systems differs from forced drainage due to flux-driven conditions.

Conclusions:

Interface mobility in foams is context-dependent, influenced by hydrodynamic conditions.
Rising foam dynamics are governed by bottom flux, leading to non-equilibrium interfaces.
The model provides a valuable tool for understanding and controlling foam properties in industrial applications.