Method for determining capillary pressure and relative permeability by imaging
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United States of America Patent
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Jan 16, 1990
Issued Date -
N/A
app pub date -
Jul 22, 1988
filing date -
Jul 2, 1986
priority date (Note) -
Expired
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Abstract
The present invention provides methods and apparatus for determining relative permeability and capillary pressure employing saturation profile images of fluids in a porous sample obtained by imaging apparatus. The methods employ saturation profiles of a fluid to obtain time and spatial derivatives of the saturation profiles. The methods then employ the time derivatives with measured total superficial velocities to determine individual superficial velocities of the fluids which may then be employed with the spatial derivatives to determine mobility coefficients. The methods of the present invention may also measure the pressures of one fluid and then determine relative permeabilities and capillary pressures for all the fluids in the porous sample.
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