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). 


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: 


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