---
name: "upscale_cap"
section: "1"
platform: "linux"
package: "libopm-upscaling-bin"
version: "2024.10+ds-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/upscale_cap"
---

# upscale\_cap(1)

Upscale capillary pressure and water saturation.

## NAME

upscale\_cap - Upscale capillary pressure and water saturation.

## SYNOPSIS

upscale\_cap \[option value\] \[grid file\] \[rock file 1\] \[rock file 2\] \[rock file 3\] ...

## DESCRIPTION

Upscale the capillary pressure function and water saturation, both for the whole geometry, and on a per rocktype basis.

Example usage:

upscale\_cap grid.grdecl swof1.inc swof2.inc

For isotropic input, the rock file has four columns, and looks like this:

\-- Stone 1 -- Sw           Krw             Kro     J-func\
   1\.42000E-01  0.00000E+00  1.00000E+00  2.25999E+00\
   2\.79250E-01  1.93652E-03  5.03619E-01  5.76122E-02\
   4\.14850E-01  1.09648E-02  2.36036E-01  -1.23421E-02\
   6\.14150E-01  4.10007E-02  3.95006E-02  -8.96693E-02\
   7\.26100E-01  1.41398E-01  9.30808E-03  -1.19849E-01\
   9\.48000E-01  8.40000E-01  0.00000E+00  -1.42553E+00

## OPTIONS

**-points** Number of saturation points to upscale for, uniformly distributed. Defaults to 30.\
 **-jFunctionCurve** If upscaleBothPhases is false and input is isotropic,the column number in the stone-files that represent the Leverett J-function. Defaults to 4.\
 **-surfaceTension** Surface tension in dynes/cm to use in J-function/Pc conversion. Contact angle is not supported, and os  heta=1 is effectively used. Defaults to 11.\
 **-output** Filename for where to write upscaled values.\
 **-maxPermContrast** Maximal permeability contrast in model. Defaults to 1e7.\
 **-minPerm** Minimum value allowed for phase permeability. Defaults to 1e-12.

## REPORTING BUGS

Report on github repository \<https://github.com/OPM/opm-upscaling/issues\>

## SEE ALSO

upscale\_relperm