ComboCurve: Import Forecast Parameter

ComboCurve: Import Forecast Parameter

Import Forecast Parameters 

In this article we outline the steps necessary to import a csv of forecast parameters into a ComboCurve forecast.
ComboCurve uses a specific format for forecast csv import. To better understand this format, we recommend creating a dummy forecast and export the forecast parameters. This can be done, by going to forecast options >> export forecast parameters (CSV). 


Note: Currently, the software cannot import volumetric forecasts. We do have a converter that allows you to convert volumetric forecasts into forecast parameters that can then be imported if needed.

Before moving to create the import file, you’ll need to import the well themselves (header + production data) to the current project. Then you’ll need to create a forecast containing the wells.

Once the download is completed, you can refer to the csv as a template to add your own forecast parameters. However, not all the columns are needed for import. The required columns are listed below for each forecast type:

  1. Arps/Arps Incline
    1. INPT ID
    2. Phase
    3. Segment
    4. Type
    5. Segment Type
    6. Start Date
    7. End Date
    8. q Start (BBL/D)
    9. Di Eff-Sec (%) or Di Nominal
    10. b
  2. Exponential Decline/Exponential Incline
    1. INPT ID
    2. Phase
    3. Segment
    4. Type
    5. Segment Type
    6. Start Date
    7. End Date
    8. q Start (BBL/D)
    9. Di Eff-Sec (%) or Di Nominal
  3. Flat
    1. INPT ID
    2. Phase
    3. Segment
    4. Type
    5. Segment Type
    6. Start Date
    7. End Date
    8. q Start (BBL/D)
  4. Linear
    1. INPT ID
    2. Phase
    3. Segment
    4. Type
    5. Segment Type
    6. Start Date
    7. End Date
    8. q Start (BBL/D)
    9. Di Eff-Sec (%)
  5. Arps Modified
    1. INPT ID
    2. Phase
    3. Segment
    4. Type
    5. Segment Type
    6. Start Date
    7. End Date
    8. q Start (BBL/D)
    9. Di Eff-Sec (%) or Di Nominal
    10. b
    11. Realized D Sw-Eff-Sec (%)
  6. Shut-in
    1. INPT ID
    2. Phase
    3. Segment
    4. Type
    5. Segment Type
    6. Start Date
    7. End Date
Once the forecast parameter csv is completed, you can navigate to forecast options >> import forecast >> select the appropriate prod data resolution >> select the file >> import



Additional Notes

  1. When importing ratio forecasts, the Base Phase column must also be filled out.
  2. When importing forecast parameters or a linear segment, the D_eff must be linearized as follows:

  1. D_eff (for all segment types) is calculated using the Secant method. To convert a Tangent decline to a secant decline you can use the following formula: