STOMP

Initial Conditions Card Options (EOR)

STOMP-EOR is designed to solve problems involving the transport of energy, water, CO2, CH4, salt, and a user-defined number of petroleum components with passive solutes or reactive species through variably saturated geologic media under non-isothermal conditions. Alternatively under the black-oil option, the simulator solves problems involving the transport of water, oil, gas, and salt passive solutes or reactive species through variably saturated geologic media under isothermal conditions. The Initial Conditions Card for this operational mode is used to specify the state of the system at the start of the simulation.  For STOMP-EOR the number of degrees of freedom depends on the initial phase condition: 1) aqueous saturated (IC1), 2) aqueous partially saturated (IC2), or 3) aqueous unsaturated (IC3).  A phase condition must be specified for every grid cell, and each phase condition has a prescribed number of input parameters, which must be defined.  Solutes are passive tracers that partition between the three mobile (i.e., aqueous, nonaqueous-liquid and gas) phases and the immobile solid phase (i.e., geologic media).  When solute transport is specified the initial concentrations of solutes are defined via the solute variable options.  Species are reactive tracers that are associated with a single mobile phase (i.e., aqueous, nonaqueous-liquid, or gas) or the immobile solid phase (i.e., geologic media).  Species migrate between phases via defined equilibrium or kinetic reactions.  When reactive transport is specified and the ECKEChem module is implemented, the initial concentrations of species are defined via the species variable options.  There are three types of parameters, whose initial conditions can be specified: 1) state variables, 2) solute variables, and 3) species variables.  A number of options are available for specifying parameters.

Initial Conditions - IC1 Phase Condition

IC1

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Aqueous saturated phase condition

Click here to see the IC1 Phase Condition Parameters...

Temperature

Temperature at the volumetric centroid of the grid cell.  For STOMP-EOR the temperature should be between the triple point 0.01˚C and the critical point 374.14˚C of water.

Pressure

Pressure at the volumetric centroid of the grid cell.  The value should be specified in terms of absolute pressure.

Aqueous Salt Relative Saturation

The relative amount of salt that can be dissolved in the aqueous phase as a function of temperature and pressure at the volumetric centroid of the grid cell.  The value should be between 0.0 and the solubility limit for salt as a function of temperature and pressure.

Aqueous Salt Mass

The mass fraction of salt that is dissolved in the aqueous phase at the volumetric centroid of the grid cell.  The value should be between 0.0 and the solubility limit for salt as a function of temperature and pressure.

Aqueous CO2 Relative Saturation

The relative amount of CO2 that can be dissolved in the aqueous phase as a function of temperature, pressure, and salinity at the volumetric centroid of the grid cell.  The value should be between 0.0 and 1.0.

Aqueous CO2 Mass Fraction

The mass fraction of CO2 that is dissolved in the aqueous phase at the volumetric centroid of the grid cell.  The value should be between 0.0 and the solubility limit for CO2 as a function of temperature, pressure, and salinity.

Overwrite

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When the keyword "overwrite" is included with any of the above options during at restart simulation, the specified values will overwrite those from the restart file.

Initial Conditions - IC2 Phase Condition

IC2

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Aqueous partially saturated phase condition

Click here to see the IC2 Phase Condition Parameters...

Temperature

Temperature at the volumetric centroid of the grid cell.  For STOMP-EOR the temperature should be between the triple point 0.01˚C and the critical point 374.14˚C of water.

Pressure

Pressure at the volumetric centroid of the grid cell.  The value should be specified in terms of absolute pressure.

Aqueous Saturation

The aqueous saturation at the volumetric centroid of the grid cell.  The value should be between the residual aqueous saturation and 1.0, unless the s-P function has been extended to saturations below the residual aqueous saturation.  In this case the value should be between 0.0 and 1.0.

Aqueous Salt Relative Saturation

The relative amount of salt that can be dissolved in the aqueous phase as a function of temperature and pressure at the volumetric centroid of the grid cell.  The value should be between 0.0 and the solubility limit for salt as a function of temperature and pressure.

Aqueous Salt Mass

The mass fraction of salt that is dissolved in the aqueous phase at the volumetric centroid of the grid cell.  The value should be between 0.0 and the solubility limit for salt as a function of temperature and pressure.

Total Mole Fraction of Petroleum Components

The mole fraction of each individual petroleum components, including CO2 and CH4 with respect to the total mass of petroleum components in the grid cell, defined at the volumetric centroid of the grid cell.

Mole Fraction Summation

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The summation of the total mole fractions of all petroleum components, including CO2 and CH4 must be 1.0 

Overwrite

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When the keyword "overwrite" is included with any of the above options during at restart simulation, the specified values will overwrite those from the restart file.

Initial Conditions - IC3 Phase Condition

IC3

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Aqueous unsaturated phase condition

Click here to see the IC3 Phase Condition Parameters...

Temperature

Temperature at the volumetric centroid of the grid cell.  For STOMP-EOR the temperature should be between the triple point 0.01˚C and the critical point 374.14˚C of water.

Pressure

Pressure at the volumetric centroid of the grid cell.  The value should be specified in terms of absolute pressure.

Water Vapor Relative Saturation

The relative humidity of the water vapor for the given temperature and pressure.

Total Mole Fraction of Petroleum Components

The mole fraction of each individual petroleum components, including CO2 and CH4 with respect to the total mass of petroleum components in the grid cell, defined at the volumetric centroid of the grid cell.

Mole Fraction Summation

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The summation of the total mole fractions of all petroleum components, including CO2 and CH4 must be 1.0 

Overwrite

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When the keyword "overwrite" is included with any of the above options during at restart simulation, the specified values will overwrite those from the restart file.

Initial Conditions - Solute Variable Options

Click here to see the Solute Variable Options...

Solute Volumetric Concentration

Solute concentration per grid-cell volume at the volumetric centroid of the grid cell.  The value should be greater than or equal to 0.0 and the units for solutes need be consistent across all input cards.

Overwrite

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When the keyword "overwrite" is included with any of the above options during at restart simulation, the specified values will overwrite those from the restart file.

Initial Conditions - Species Variable Options (EOR-R)

ECKEChem

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Species are reactive and require the ECKEChem Module to be implemented in the simulator.

Click here to see the Species Variable Options...

Aqueous Species - Aqueous Concentration

Aqueous species aqueous concentration, in terms of moles of species per mass of aqueous phase at the volumetric centroid of the grid cell.  The value should be greater than or equal to 0.0.

Aqueous Species - Aqueous Molal Concentration

Aqueous species aqueous concentration, in terms of moles of species per kg of water at the volumetric centroid of the grid cell.  The value should be greater than or equal to 0.0.

Nonaqueous Species - Nonaqueous-Liquid Concentration

Nonaqueous-liquid species nonaqueous-liquid concentration, in terms of moles of species per mass of nonaqueous-liquid phase at the volumetric centroid of the grid cell.  The value should be greater than or equal to 0.0.

Gas Species - Gas Concentration

Gas species gas concentration, in terms of moles of species per mass of gas phase at the volumetric centroid of the grid cell.  The value should be greater than or equal to 0.0.

Species Volumetric Concentration

Aqueous, nonaqueous-liquid, gas, or solid species volumetric concentration, in terms of in terms of moles of species per grid-cell volume at the volumetric centroid of the grid cell.  The value should be greater than or equal to 0.0.

Overwrite

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When the keyword "overwrite" is included with any of the above options during at restart simulation, the specified values will overwrite those from the restart file.

Initial Conditions - Parameter Specification Options

Click here to see the Parameter Specification Options...

Direct Input

Parameters are read directly from the input file with an associated domain and directional gradients.

Rock/Soil Zonation

Parameters are associated with a rock/soil type. All grid cells with the specified rock/soil type are assigned the specified parameter value.

External Binary File

Parameters are read from an external file in binary format. This option requires one parameter be specified for every node, following the I-J-K indexing order.

External Text (ASCII) File

Parameters are read from an external file in text format. This option requires one parameter be specified for every node, following the I-J-K indexing order.

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