Initial Conditions Card (EOR)

STOMP-EOR has two core implementations: 1) compositional and 2) black-oil. Under the compositional option, STOMP-EOR solves coupled conservation equations for energy, water mass, CO₂ mass, CH₄ mass, salt mass, and a user-specified number of petroleum components in variably saturated geologic media with the potential for three mobile phases: 1) aqueous, 2) nonaqueous-liquid, and 3) gas. Alternatively under the black-oil option, the simulator solves problems involving the transport of oil, gas, and salt passive solutes or reactive species through variably saturated geologic media under isothermal conditions. The simulator additional solves equations for the transport of passive solutes, allowing for partitioning of the solutes between the host rock/soil and mobile phases.  When the ECKEChem module is implemented with the simulator, the simulator has capabilities for solving reactive transport problems involving equilibrium, kinetic, and conservation type geochemical equations. The Initial Conditions Card is used to establish state conditions at the start of the simulation for all grid cells.  For STOMP-EOR (compositional) the number of inputs which must be specified dependents on the initial state condition, shown in the State Identifier column of Table 1.  For STOMP-EOR (black-oil) the number of inputs which must be specified dependents on the initial state condition, shown in the State Identifier column of Table 2. If the simulation involves passive solutes, the Initial Conditions Card is used to specify solute concentrations at the start of the simulation.  Likewise if the simulation involves reactive species and code implementation includes the ECKEChem module, then the Initial Conditions Card is used to specify initial species concentrations.  The default solute and species concentrations are zero.  There is no particular order required for parameters on the Initial Conditions Card.  State condition errors that arise from specifications on the Initial Conditions Card are generally noted and indicated via the state condition check routine.  For restart simulations, the Initial Conditions Card is not required, but can be used overwrite values stored in the restart file.

Compositional Option

• General concepts for applying initial conditions are provided on the Card Description page.

• Descriptions of the various classes of initial condition options (i.e., state identifier, state variables, solute variables, species variables, and parameter specifications) are provided on the Card Options (EOR) page.

• Formatting instructions for specifying initial conditions are provided on the Card Syntax (EOR) page.

• Examples of Initial Condition Cards for STOMP-CO2 with and without solutes and geochemistry are provided on the Card Examples (EOR) page.

Table 1. Phase conditions for specifying the initial thermodynamic state for the compositional option.

Black-Oil Option

• General concepts for applying initial conditions are provided on the Card Description page.

• Descriptions of the various classes of initial condition options (i.e., state identifier, state variables, solute variables, species variables, and parameter specifications) are provided on the Card Options (EOR) page.

• Formatting instructions for specifying initial conditions are provided on the Card Syntax (EOR) page.

• Examples of Initial Condition Cards for STOMP-CO2 with and without solutes and geochemistry are provided on the Card Examples (EOR) page.

Table 2. Phase conditions for specifying the initial thermodynamic state for the black-oil option.