Get access
Geophysical Research Letters

Characterization and scaling of mesoscale heterogeneities in sandstones

Authors

  • Ronny Pini,

    Corresponding author
    1. Department of Energy Resources Engineering, Stanford University, Stanford, California, USA
    • Corresponding author: R. Pini, Department of Energy Resources Engineering, Stanford University, 367 Panama Street, 065 Green Earth Sciences, Stanford, CA 94305, USA. (pini@stanford.edu)

    Search for more papers by this author
  • Sally M. Benson

    1. Department of Energy Resources Engineering, Stanford University, Stanford, California, USA
    Search for more papers by this author

Abstract

[1] A core-flooding technique to measure core- and subcore-scale capillary pressure curves is applied to the characterization of a naturally heterogeneous sandstone core. N2 and water are used as the nonwetting and wetting fluid phases, and X-ray imaging is applied to precisely visualize multiphase flow at the subcentimeter scale. The spatial variability in the Pc(S) relationship is represented in terms of scaling factors, which are further translated into a corresponding distribution of permeabilities, thus creating a unique and consistent framework where multiphase and rock properties are integrated. The analysis introduced here provides a practical and efficient method for characterizing subcore-scale heterogeneities, whose effects can be substantial on both single and multiphase flows.

Get access to the full text of this article

Ancillary