Effects of pore geometry on flowing foam dynamics in 3D-printed porous media

Kofi Osei-Bonsu, Paul Grassia, Nima Shokri

Research output: Contribution to journalArticle

8 Citations (Scopus)
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Abstract

Foam flow in porous media is important in several environmental and industrial applications including soil remediation and enhanced oil recovery. The behaviour of foam is greatly influenced by transport properties of porous media, properties of foam and the fluid residing in porous media. We conducted a series of experiments to investigate the effects of pore geometry on foam flow in porous media and its implications for hydrocarbon displacement. We fabricated four porous media with well-defined pore throat size distributions, permeability and angularity by means of 3D printing technology. The models were initially saturated with oil. Gas and surfactant solution were subsequently injected into the model simultaneously for in-situ generation of foam to displace the oil. Displacement dynamics were recorded using an automatedic imaging setup. Analysis of the pore-scale images revealed that the injected pore volumes required for the initiation of foam generation decreased as the pore size of porous media increased, presumably due to the lower entry capillary pressure. For the same pore throat size range, changes in the permeability due to increased number of pore throats did not appear to have a significant influence on the overall recovery of oil. Our results illustrate the impact of grain angularity on foam generation owing to its influence on the pore-to-throat aspect ratio and capillary pressure gradient.
Original languageEnglish
Pages (from-to)903-917
Number of pages15
JournalTransport in Porous Media
Volume124
Issue number3
Early online date15 Jun 2018
DOIs
Publication statusPublished - 30 Sep 2018

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Keywords

  • foam generation
  • foam propigation
  • porous media
  • pore geometry and angularity
  • minimum pressure gradient
  • 3D printing technology

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