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Mechanism behind Erosive Bursts In Porous Media.

R Jäger1, M Mendoza1, H J Herrmann1

  • 1ETH Zürich, Computational Physics for Engineering Materials, Institute for Building Materials, Wolfgang-Pauli-Strasse 27, HIT, CH-8093 Zürich, Switzerland.

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|January 18, 2018
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Sudden erosive bursts in porous media flow, marked by permeability and pressure jumps, are caused by clogged pores reopening. This occurs when the pressure difference exceeds a critical threshold, offering insights into oil well sand production and filtration breakthroughs.

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Area of Science:

  • Fluid dynamics
  • Geophysics
  • Materials science

Background:

  • Flow through porous media can cause erosion and deposition.
  • These processes can lead to abrupt increases in permeability and pressure loss, known as erosive bursts.
  • Understanding these bursts is crucial for applications like oil extraction and filtration.

Purpose of the Study:

  • To identify the underlying mechanism of erosive bursts during flow through porous media.
  • To numerically simulate and experimentally validate the phenomenon of pore reopening.
  • To investigate the relationship between particle concentration and permeability jumps.

Main Methods:

  • Numerical simulations of fluid flow through porous media.
  • Comparison of simulation predictions with experimental data.
  • Analysis of pressure loss and permeability jump dynamics.

Main Results:

  • Erosive bursts are caused by the reopening of clogged pores when pressure difference exceeds a threshold.
  • Simulations accurately reproduced experimental observations of pressure loss and permeability jumps.
  • Erosive bursts occur within a specific range of pressure gradient thresholds.

Conclusions:

  • The study elucidates the pore-reopening mechanism behind erosive bursts in porous media.
  • Findings enhance understanding of sand production in oil wells and breakthrough phenomena in filtration.
  • The identified critical pressure thresholds offer predictive capabilities for managing such events.