Modeling and Experimental Validation of Rheological Transition During Foam Flow in Porous Media

M. Simjoo, P. L.J. Zitha

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

Flow of nitrogen foam stabilized by alpha olefin sulfonate (C 14-16 AOS) was studied in a natural sandstone porous media using X-ray Computed Tomography. Foam was generated by a simultaneous injection of gas and surfactant solution into a porous medium initially saturated with the surfactant solution. It was found that the foam undergoes a transition from a weak to a strong state at a characteristic gas saturation of S gc = 0.75 ± 0.02. This transition coincided with a substantial reduction in foam mobility by a two-order of magnitude and also with a large reduction in overall water saturation to as low as 0.10 ± 0.02. Foam mobility transition was interpreted by the surge of yield stress as gas saturation exceeded the S gc . We proposed a simple power-law functional relationship between yield stress and gas saturation. The proposed rheological model captured successfully the mobility transition of foams stabilized by different surfactant concentrations and for different core lengths.

Original languageEnglish
Number of pages18
JournalTransport in Porous Media
DOIs
Publication statusPublished - 2019

Keywords

  • Foam flow
  • Mobility transition
  • Porous media
  • Yield stress

Fingerprint Dive into the research topics of 'Modeling and Experimental Validation of Rheological Transition During Foam Flow in Porous Media'. Together they form a unique fingerprint.

Cite this