PVT Explorer

By clicking the ‘PVT’ button, the app will display the list of available PVT for the user. It will enable him to create, load, edit and delete PVTs; and will allow him to assign a specific PVT to a well or to a well group.

PVT Explorer - PVT creating, loading and saving

Create a new PVT By clicking the ‘+’ button in the PVT Explorer window, the app will display a floating window. This view will be divided in ‘steps’ for the user to define the model, navigating through ‘Next’ and ‘Back’ buttons.

Create PVT - Definition

Step 1: Definition

• PVT Name: text input for giving a name to the PVT model

• Phases: dropdown defining the number of phases of the PVT model. Options:

     o Single phase (default option)

     o Multiphase (this option is disabled at this moment)

• Reference fluid: indicates the main fluid of the PVT model. Options:

     o Oil

     o Gas

     o Water (this option is disabled at this moment)

Step 2: Fluid system (Oil)

Create PVT – Fluid system (Oil)

Reference parameters:

• Pressure: reference pressure. Default value: 351.535 kg/cm²

• Temperature: reference temperature. Default value: 100 °C

• GOR: reference Gas Oil Ratio. Default value: 100 m3/m3

Variable ranges:

• Pressure: Minimum default value: 1.03323 kg/cm², Maximum default value: 704.103 kg/cm², Increment calculated as (pressure_max - pressure_min) / (num_of_points - 1)

• Temperature: Minimum: default value: 0.03323 °C, Maximum: Default value: 150.232 °C, Increment calculated as (temperature_max - temperature _min) / (num_of_points - 1)

• Number of points: Default value: 201

Step 3: Properties - General (Oil)

Create PVT – Properties - General (Oil)

• Oil gravity: Default value: 0.8 sp. gr. (specific gravity). Units available:

     o sp. gr.

     o °API

• Oil compressibility (Co): Default value: Vasquez-Beggs

• Oil volume factor (Bo): Default value: Standing

• Oil viscosity (μo): Default value: Beggs-Robinson

Step 4: Properties - General (Gas)

Create PVT – Properties - General (Gas)

• Specific gas gravity: Default value: 0.7

• H2S, CO2, and N2: Default value: 0.00 in Fraction. Units available:

     o Fraction

     o %

• Pseudo critical properties: Default value: Carr et al.

• Pc: pseudo critical pressure. This field is not editable, it is calculated by the PVT API.

• Tc: pseudo critical temperature. This field is not editable, it is calculated by the PVT API.

• Compressibility factor (Z): Default value: Hall-Yarborough

• Formation volume factor (Bg): Default value: Internal

• Viscosity (μg): Default value: Lee et al.

Step 5: View results

The following tabs allow you to view the results for the properties calculated for oil and gas according to the entered parameters.

Create PVT – Oil compressibility (Co)

Create PVT – Oil volume factor (Bo)

Create PVT – Oil density (ρo)

Create PVT – Oil Viscosity (μo)

Create PVT – Gas Z factor

Create PVT – Gas Formation volume factor (Bg)

Create PVT – Gas Compressibility (Cg)

Create PVT – Gas Density (ρg)

Create PVT – Gas Viscosity (μg)

When this last property is calculated, the Save button will be enabled, and in this instance the calculated PVT can be saved.