Experimental study of two-phase flow in three sandstones. II Capillary pressure curve measurement and relative permeability pore space capillary models

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2002
auteur(s) Dana Esam; Skoczylas Frédéric
journal International Journal of Multiphase flow
volume (numéro) 28 (12)
  
pages 1965 – 1981
résumé By means of the porous plate method and mercury porosimetry intrusion tests, capillary pressure curves of three different sandstones were measured. The testing results have been exploited jointly with three relative permeability models of the pore space capillary type (Burdine’s model type), these models are widely used and in rather distinct fields. To do so, capillary pressure has been correlated to saturation degree using six of the most popular relations encountered in the literature. Model predictions were systematically compared to the experimentally measured relative permeabilities presented in the first part of this work. Comparison indicated that the studied models underestimate the water relative permeability and over-estimate that of the non-wetting phase. Moreover, this modeling proves to be unable to locate the significant points that are the limits of fields of saturation where the variation of the relative permeabilities becomes consequent. We also showed that, if pore structure is modeled as a "bundle of capillary tubes", model predications are independent of the capillary pressure curve measuring method.
mots clés Experiments; capillary pressure curves; mercury porosimetry; models; relative permeability
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