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Related Experiment Video

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A Microfluidic Platform to Study Bioclogging in Porous Media

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How Equivalent Are Equivalent Porous Media?

Ahmad Zareidarmiyan^1,2,3, Francesco Parisio⁴, Roman Y Makhnenko⁵

¹Department of Mining and Metallurgical Engineering Amirkabir University of Technology-Tehran Polytechnic (AUT) Tehran Iran.

Geophysical Research Letters

|July 5, 2021

Summary

Simplifying fractured rock models with equivalent porous media can lead to inaccurate pore pressure distribution and fracture stability predictions. Explicitly modeling fractures is often necessary for reliable geoenergy simulations and induced seismicity forecasting.

Keywords:

fractures geoenergies induced seismicity permeability thermal effect

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Area of Science:

Geosciences
Computational modeling
Energy resources

Background:

Geoenergy and geoengineering commonly involve fluid flow in fractured rock formations.
Accurate modeling of these processes requires understanding the interplay between pore pressure and rock deformation (poromechanics).

Purpose of the Study:

To assess the validity of using equivalent porous media as a simplification for modeling fluid flow in fractured rocks.
To compare the accuracy of equivalent porous media models against explicit fracture models in geoenergy applications.

Main Methods:

Numerical simulations comparing two modeling approaches: explicit fracture representation versus equivalent porous media.
Calibration of both models to match injection and production well data.

Main Results:

Significant differences in pore pressure distribution were observed between the two modeling approaches.
Equivalent porous media models failed to accurately capture changes in fracture stability.

Conclusions:

Explicitly modeling fractures is crucial for accurate coupled thermohydromechanical simulations in certain geoenergy contexts.
Accurate fracture modeling can enhance the reliability of tools used for induced seismicity forecasting.