Method for determining capillary pressure and relative permeabil

Details Method for determining capillary pressure and relative permeabil Method for determining capillary pressure and relative permeabil

1988-07-22

1990-01-16

Raevis, Robert R.

Measuring and testing

Borehole or drilling

Downhole test

E21B 4902

Patent

active

048935042

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.

REFERENCES:
patent: 4543821 (1985-10-01), Davis, Jr.
patent: 4562540 (1985-12-01), Deraney
patent: 4751646 (1988-06-01), Alger

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