Hydraulic Properties Card Options (GT)

Permeability

This is the default specification. Permeability is computed as the product of the rock intrinsic permeability and the permeability reduction factor. A primary assumption of the simulator is that principal components of the intrinsic permeability tensor are aligned with the principal coordinate directions. For cylindrical coordinate systems the radial, azimuthal, and vertical permeabilities correspond with the x-, y-, and z-direction values, respectively. The permeability tensor in STOMP-GT has zero off-diagonal elements, requiring the specification of intrinsic permeability in the three principal axis directions, but intrinsic permeabilities for inactive principal directions are not required. For example, in a one-dimensional radial problem, only the intrinsic permeability in the radial direction needs to be specified. Default units of m² are applied to null entries for the units associated with permeability values.

Symbols
	intrinsic permeability, m²
	saturated hydraulic conductivity, m/s
	dynamic viscosity of fluid, kg/m s
	density of fluid, kg/m³
	acceleration due to gravity, m/s²

Hydraulic Conductivity

If units of hydraulic conductivity are specified (using the keyword hc), the intrinsic permeability is computed assuming that the hydraulic conductivity was specified for the density and viscosity of water at 25˚C and 1 atm.

Sub-Options

Either or both of the following options can be used with either the Permeability or Hydraulic Conductivity Option.

IJK, JKI or KIJ Indexing

If IJK Indexing, JKI Indexing, or KIJ Indexing is specified as the Rock/Soil Name in the Rock/Soil Zonation Card, then this must also be specified as the Rock/Soil Name in the Hydraulic Properties Card.

IJK Indexing

If the IJK Indexing option is specified in the Rock/Soil Zonation Card, then any or all of the hydraulic properties parameters can be specified either as a single value that will be applied to each node in the domain, or in an external file with the values for every grid-cell ordered according to the IJK indexing scheme. Units shown in the input line will be applied to all parameters in the external file.

JKI Indexing

If the JKI Indexing option is specified in the Rock/Soil Zonation Card, then any or all of the hydraulic properties parameters can be specified either as a single value that will be applied to each node in the domain, or in an external file with the values for every grid-cell ordered according to the JKI indexing scheme. Units shown in the input line will be applied to all parameters in the external file.

KIJ Indexing

If the KIJ Indexing option is specified in the Rock/Soil Zonation Card, then any or all of the hydraulic properties parameters can be specified either as a single value that will be applied to each node in the domain, or in an external file with the values for every grid-cell ordered according to the KIJ indexing scheme. Units shown in the input line will be applied to all parameters in the external file.

Dual Porosity/Permeability Model for Fractured Systems

If the key words 'dp,' 'dual porosity,' or 'fractured' appear in the rock/soil name specified inthe Rock/Soil Zonation Card, indicating a dual porosity medium, the reading of both matrix and fracture properties (e.g., Fracture and Matrix Intrinsic Permeability) is triggered.