Article

 

Pore-scale displacement mechanisms as a source of hysteresis for two-phase flow in porous media Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/d217qv372

Supporting Information is available online at:  http://onlinelibrary.wiley.com/doi/10.1002/2015WR018254/abstract

Access to this item has been restricted by repository administrators at the request of the publisher until September 30, 2016.

This is the publisher’s final pdf. The article is copyrighted by American Geophysical Union and published by John Wiley & Sons, Inc. It can be found at:  http://sites.agu.org/

Descriptions

Attribute NameValues
Creator
Abstract
  • The macroscopic description of the hysteretic behavior of two-phase flow in porous media remains a challenge. It is not obvious how to represent the underlying pore-scale processes at the Darcy-scale in a consistent way. Darcy-scale thermodynamic models do not completely eliminate hysteresis and our findings indicate that the shape of displacement fronts is an additional source of hysteresis that has not been considered before. This is a shortcoming because effective process behavior such as trapping efficiency of CO₂ or oil production during water flooding are directly linked to pore-scale displacement mechanisms with very different front shape such as capillary fingering, flat frontal displacement, or cluster growth. Here we introduce fluid topology, expressed by the Euler characteristic of the nonwetting phase (χ[subscript]n), as a shape measure of displacement fronts. Using two high-quality data sets obtained by fast X-ray tomography, we show that χ[subscript]n is hysteretic between drainage and imbibition and characteristic for the underlying displacement pattern. In a more physical sense, the Euler characteristic can be interpreted as a parameter describing local fluid connectedness. It may provide the closing link between a topological characterization and macroscopic formulations of two-phase immiscible displacement in porous rock. Since fast X-ray tomography is currently becoming a mature technique, we expect a significant growth in high-quality data sets of real time fluid displacement processes in the future. The novel measures of fluid topology presented here have the potential to become standard metrics needed to fully explore them.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Schlüter, S., Berg, S., Rücker, M., Armstrong, R. T., Vogel, H. J., Hilfer, R., & Wildenschild, D. (2016). Pore‐scale displacement mechanisms as a source of hysteresis for two‐phase flow in porous media. Water Resources Research, 52(3), 2194-2205. doi:10.1002/2015WR018254
Journal Title
Journal Volume
  • 52
Journal Issue/Number
  • 3
Keyword
Rights Statement
Funding Statement (additional comments about funding)
  • This research used resources of the Advanced Photon Source which is a DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract DE-AC02-06CH11357. We acknowledge the support of GeoSoilEnviroCARS (Sector 13), which is supported by the National Science Foundation Earth Sciences (EAR-1128799), and the Department of Energy, Geosciences (DE-FG02-94ER14466). This research was supported by the US National Science Foundation, award # EAR-1344877. We thank Mark Rivers at the Advanced Photon Source for assistance at the GSECARS beam line, Holger Ott and Apostolos Georgiadis (Shell) for assistance during the fractional flow experiment, as well as Anna Herring and Tianyi Li (OSU) for proving data. The first author is grateful to the Alexander-von-Humboldt Foundation for granting a Feodor-von-Lynen scholarship. Rudolf Hilfer thanks the Deutsche Forschungsgemeinschaft for financial support.
Publisher
Peer Reviewed
Language
Replaces

Relationships

Parents:

This work has no parents.

Items