STOMP

Mechanical Properties Card (EOR-BO)

This card allows the user to assign values to the particle density, porosity, specific storativity, compressibility, and tortuosity function for each defined rock/soil type. Every rock/soil type defined on the Rock/Soil Zonation Card must be referenced. 

Particle Density represents the rock grain density.  This value will default to 2650 kg/m3 by using a null entry for both the particle density and its associated unit. 

Total Porosity refers to total connected and unconnected pore volumes. 

Diffusive Porosity refers to only the connected pore volume. 

Specific Storativity is computed from the Diffusive Porosity and compressibility. As with Particle Density, default values of Specific Storativity will be computed for null entries of both the Specific Storativity and its associated Units.  Default specific storativity is computed from the Diffusive Porosity and a default value of 1.x10–7 1/Pa for the compressibility.  Alternatively, the Pore Compressibility can be read directly along with a Pore Compressibility Reference Pressure

Tortuosity functions are required for simulations that involve solute transport or diffusion of components through phases (e.g., water vapor diffusing through the gas phase or dissolved oil diffusing through the aqueous phase).  Tortuosities can be computed either as constants, which require input values, or as functions of the phase saturation and diffusive porosity through the Millington and Quirk function.  Refer to the STOMP Theory Guide (White and Oostrom 2000) for a description of the Millington and Quirk tortuosity function.  The key words 'dp,' 'dual porosity,' or 'fractured' in the rock/soil name indicate a dual porosity medium, which triggers the reading of both matrix and fracture properties (e.g., Fracture and Matrix Diffusive PorosityFracture and Matrix Specific Storativity).

  • Mechanical property models, model options and model parameters are described on the Card Options page.
  • Formatting instructions for specifying the mechanical property models and parameters are provided on the Card Syntax page.

  • Examples of Mechanical Properties Cards for STOMP-EOR are provided on the Card Examples page.

 

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