Partially Miscible Three-Phase Model Based on the Black Oil Assumptions. More...
Classes | |
class | Ewoms::BlackOilBoundaryRateVector< TypeTag > |
Implements a boundary vector for the fully implicit black-oil model. More... | |
class | Ewoms::BlackOilExtensiveQuantities< TypeTag > |
This template class contains the data which is required to calculate the fluxes of the fluid phases over a face of a finite volume for the black-oil model. More... | |
class | Ewoms::BlackOilFluidState< TypeTag > |
Implements a "taylor-made" fluid state class for the black-oil model. More... | |
struct | Ewoms::BlackOilIndices< numSolventsV, numPolymersV, PVOffset > |
The primary variable and equation indices for the black-oil model. More... | |
class | Ewoms::BlackOilIntensiveQuantities< TypeTag > |
Contains the quantities which are are constant within a finite volume in the black-oil model. More... | |
class | Ewoms::BlackOilLocalResidual< TypeTag > |
Calculates the local residual of the black oil model. More... | |
class | Ewoms::BlackOilModel< TypeTag > |
A fully-implicit black-oil flow model. More... | |
class | Ewoms::BlackOilNewtonMethod< TypeTag > |
A newton solver which is specific to the black oil model. More... | |
class | Ewoms::BlackOilPrimaryVariables< TypeTag > |
Represents the primary variables used by the black-oil model. More... | |
class | Ewoms::BlackOilProblem< TypeTag > |
Base class for all problems which use the black-oil model. More... | |
class | Ewoms::BlackOilRateVector< TypeTag > |
Implements a vector representing mass, molar or volumetric rates for the black oil model. More... | |
struct | Ewoms::BlackOilTwoPhaseIndices< numSolventsV, numPolymersV, PVOffset, disabledCanonicalCompIdx > |
The primary variable and equation indices for the black-oil model. More... | |
Partially Miscible Three-Phase Model Based on the Black Oil Assumptions.
The black-oil model is a three-phase, three-component model widely used for oil reservoir simulation. The phases are denoted by lower index ("water", "gas" and "oil") and the components by upper index
("Water", "Gas" and "Oil"). The model assumes partial miscibility:
The densities of the phases are determined by so-called formation volume factors:
Since the gas and water phases are assumed to be immiscible, this is sufficint to calculate their density. For the formation volume factor of the the oil phase determines the density of saturated oil, i.e. the density of the oil phase if some gas phase is present.
The composition of the oil phase is given by the gas dissolution factor , which defined as the volume of gas at atmospheric pressure that is dissolved in a given amount of oil at reservoir pressure:
This allows to calculate all quantities required for the mass-conservation equations for each component, i.e.
where is the filter velocity of the phase
.
By default is determined by using the standard multi-phase Darcy approach, i.e.
although the actual approach which is used can be specified via the FluxModule
property. For example, the velocity model can by changed to the Forchheimer approach by
The primary variables used by this model are: