Abstract: Utility of the three-constant form of the hyperbola has fited to capillary pressure curves by least-squares solution,obtained a general expression for capillary pressure curves.It was found to fit the capillary pressure curves throughout the range of data,allowed differentiation,integration,smooths laboratory data,can be extrapolated to 100% single-phase saturation to obtain the correct threshold pressure,can be differentiated to obtain accurate calculation of the inlet saturation for centrifuge-derived data.The capillary pressure curves can be used in expecting.Fluid saturation and height above the free water level and thickness of transitional zone,evaluating rock sealing property, dividing reservoir and nonreservoir,pay and nonpay,determinating pore-size distribution,analysing the single-phare fluid flow characteristics of rocks,evaluation damage of oil well working fluid to formation, determinating wettability and the energy for fluid displacements,and calculating absolute permeability and relative permeability.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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