Record Display for the EPA National Library Catalog


Main Title Effect of Temperature and Pore Size on the Hydraulic Properties and Flow of a Hydrocarbon Oil in the Subsurface.
Author Davis, E. L. ;
CORP Author Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c10 Jan 94
Year Published 1994
Report Number EPA/600/J-94/304;
Stock Number PB94-189701
Additional Subjects Oils ; Hydraulic properties ; Pore pressure ; Temperature ; Reprints ; Oil-water interfaces ; Capillary action ; Fluid mechanics ; Ratios ; Wetting ; Saturation ; Subsurface flow ; Two phase flow ; Moisture content ; Hydrocarbon oil ; Capillary pressure-saturation curves
Library Call Number Additional Info Location Last
NTIS  PB94-189701 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 33p
Capillary pressure relationships in a porous medium determine the distribution of immiscible fluids under static conditions and can largely influence the movement of the fluids when the system is not at equilibrium. The capillary pressure-saturation curves measured here for hydrocarbon oil-water do not have a constant capillary pressure ratio with saturation when compared to the water-air system, and changes in ratio were found when comparing the water-air curves measured at different temperatures. Thus, the scaling theory based on interfacial tensions and contact angles does not adequately account for differences in capillary pressures due to different fluid pairs or temperatures. When the capillary pressure-saturation relationship is extended to the calculation of relative permeabilities and the prediction of fluid flow in the subsurface, the differences in measured and scaled capillary pressure curves lead to differences in the predicted flow rates and saturations of the immiscible fluids in the subsurface. Thus, care must be used when applying capillary pressure-saturation data from one fluid system to that of another, or when applying it to different conditions.