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Signatures of fluid–fluid displacement in porous media: wettability, patterns and pressures

Primkulov, Bauyrzhan K. and Pahlavan, Amir A. and Fu, Xiaojing and Zhao, Benzhong and MacMinn, Christopher W. and Juanes, Ruben (2019) Signatures of fluid–fluid displacement in porous media: wettability, patterns and pressures. Journal of Fluid Mechanics, 875 . Art. No. R4. ISSN 0022-1120. doi:10.1017/jfm.2019.554.

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We develop a novel ‘moving-capacitor’ dynamic network model to simulate immiscible fluid–fluid displacement in porous media. Traditional network models approximate the pore geometry as a network of fixed resistors, directly analogous to an electrical circuit. Our model additionally captures the motion of individual fluid–fluid interfaces through the pore geometry by completing this analogy, representing interfaces as a set of moving capacitors. By incorporating pore-scale invasion events, the model reproduces, for the first time, both the displacement pattern and the injection-pressure signal under a wide range of capillary numbers and substrate wettabilities. We show that at high capillary numbers the invading patterns advance symmetrically through viscous fingers. In contrast, at low capillary numbers the flow is governed by the wettability-dependent fluid–fluid interactions with the pore structure. The signature of the transition between the two regimes manifests itself in the fluctuations of the injection-pressure signal.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Primkulov, Bauyrzhan K.0000-0002-8162-2471
Pahlavan, Amir A.0000-0003-3505-9718
Fu, Xiaojing0000-0001-7120-704X
Zhao, Benzhong0000-0003-1136-9957
MacMinn, Christopher W.0000-0002-8280-0743
Juanes, Ruben0000-0002-7370-2332
Additional Information:© 2019 Cambridge University Press. Received 20 May 2019; revised 25 June 2019; accepted 4 July 2019; first published online 26 July 2019.
Subject Keywords:porous media, fingering instability, capillary flows
Record Number:CaltechAUTHORS:20200903-145145680
Persistent URL:
Official Citation:Primkulov, B., Pahlavan, A., Fu, X., Zhao, B., MacMinn, C., & Juanes, R. (2019). Signatures of fluid–fluid displacement in porous media: Wettability, patterns and pressures. Journal of Fluid Mechanics, 875, R4. doi:10.1017/jfm.2019.554
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105250
Deposited By: Tony Diaz
Deposited On:08 Sep 2020 17:04
Last Modified:16 Nov 2021 18:41

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