# Reservoir Models (IPR Models)

The different reservoir models to choose from are as follows:

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Oil/Gas### #

OilBasicThe most basic reservoir model and can be used if the productivity indices are not available.

Reservoir properties: Insert the Horizontal permeability (kH), kV/kH ratio and Skin.

- If kV/kH ratio is not given, set it to 1.

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OilFracturedAn extension of the OilBasic model and can be used for the case of a fractured reservoir

Reservoir Properties: Insert the Horizontal permeability (kH), kV/kH ratio and Skin

If kV/kH ratio is not given, set it to 1

Porosity, oil saturation and gas saturation is defined by percentage. The saturation percentages must sum to 100%, as these are used as weighted factors for the compressibilities computed from PVT

When choosing the OilFractured reservoir model, a Beta factor type selection and advanced parameters become available. The Beta factor can be set to either Norway or International, depending on the well location. The advanced parameters are:

Solution Type: DefaultWell, InfiniteConductivityFracture, UniformFluxFracture

Boundary Type: AllSidesNoFlow, LeftSideConstantPressure, TopSideConstantPressure, LeftAndRightSideConstantPressure, TopAndBottomSideConstantPressure, TopAndBottomSideConstantPressure

Flow Conditions: Automatic, PseudoSteadyState, Transient

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OilExplicitThe simplest inflow model where the productivity index for the predefined penetration scenarios are set directly as probability distributions.

Inflow productivity index, when penetrating 100%, 50% or 5m of the reservoir, has to be defined.

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Gas Condensate### #

GasDeliverabilityContains the same inputs at the OilFractured model and can be used for fractured gas reservoirs.

Reservoir properties: Insert the Test (effective) permeability (kH), kV/kH ratio and skin.

If kV/kH ratio is not given, set it to 1.

The porosity is defined by percentage.

When choosing the GasDeliverability reservoir model, a Beta factor type selection and advanced parameters becomes available.

The Beta factor can be set to either Norway or International, depending on the well location.

The advanced parameters are Solution type, Boundary type and Flow conditions.

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GasExplicitThe simplest inflow model, where the productivity index for the predefined penetration scenarios, are set directly as probability distributions.

Inflow productivity index, when penetrating 100%, 50% or 5m of the reservoir, has to be defined.

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UserDefined - Available for Both Oil/Gas and Gas/Condensate Reservoirs- Allows the user to input an IPR curve generated in an external software.

NOTE!

The first row must include the pressure at flow rate = 0 m3/d while the last row must include flow rate at pressure = 0 bar.