ComboCurve: Volumetric Forecasting

ComboCurve: Volumetric Forecasting

Volumetric Forecasting


Overview

Volumetric forecasting allows you to import externally generated forecast volumes directly into ComboCurve.. This article explains how to import a volumetric forecast, what the UI looks like once it is applied, what is fully supported at release, and what is planned for future updates.

Support Notes

Currently Supported:
  1. Locations -
    1. Forecast Grid Page
    2. Modular Forecasting
    3. *Econ
      1. Not supported with curtailment on the current release
  2. Features - 
    1. Importing volumetric forecasts via CSV in the Forecast module (daily and monthly resolution)
    2. Exporting volumetric volumes via CSV alongside rate and ratio forecasts
    3. Mixing volumetric and non-volumetric streams in the same forecast
    4. Applying a volumetric forecast in Economics and running cash flows
    5. Filtering wells by forecast type (Volumetric) in the Forecast module
    6. Viewing imported volumes in the read-only Volumetric Table
Not Supported but will be coming soon!
  1. Diagnostics
  2. Type Curve
  3. Rest API, DataBricks, Sync, Snowflake, 
  4. Ratio forecast with volumetric base in Economics (works visually in Forecast but not in Econ)
    1. A ratio forecast (for example, gas-to-oil ratio) where the base stream is a volumetric forecast will display correctly in the Forecast module. However, Economics does not yet handle this combination — running economics on such a setup will not produce expected results. This will be addressed in an upcoming release.

Importing Volumetric Forecast

Volumetric forecasts are imported through the standard forecast import workflow, with a new source option added specifically for this feature.

Step 1: Open the Import Forecast Dialog
Navigate to the forecast for a well or group of wells and open Forecast Options → Import Forecast. You will see the Source dropdown, which now includes a new option: ComboCurve Volumetric.
                                     




Step 2: Download the Right Template
Select ComboCurve Volumetric as the source, then download the template that matches the resolution of your forecast data:
  1. Download Daily Template — use when your forecast volumes are in daily resolution.
  2. Download Monthly Template — use when your forecast volumes are in monthly resolution.
The template includes columns for the well name, well number, all supported matching IDs, the date, and one column per stream. The date column determines resolution: if your data is monthly but the date column shows daily intervals, you have the wrong template.

Notes
Note: For Streams and Custom Streams - 
The template is generated based on your Stream Management configuration. If you have only oil, gas, and water configured, the template will show only those three streams. 

Step 3: Fill Out the Template
Fill in the required columns:
  1. Your chosen matching ID (chosen ID, INPT ID, or another supported identifier)
  2. The date column
  3. Volume values for each stream
You only need to populate the ID column you intend to match on. For example, if matching on Chosen ID, you do not also need to fill in INPT ID — but make sure you select the correct match option in the import dialog, or ComboCurve will look at an empty column and fail to match.

Notes
Note: About Excel and Scientific Notation -
When working with large well IDs or numeric values in Excel, verify that cells are not being converted to scientific notation. This is a common import issue. Format the relevant columns as Text in Excel before pasting your data to prevent it.

Step 4: Configure Import Options and Upload
Back in the import dialog, set the two options before uploading:
  1. Match ID — select which identifier ComboCurve should use to match rows in your file to wells in the project. This must match the column you populated in the template.
  2. Forecast Resolution — this is not the resolution of the file you are importing. It is the resolution of your production data that ComboCurve will use to calculate metrics like EUR. For example, you may have a daily forecast file but want EUR calculated against monthly production.
Once configured, upload the file and click Import. Expect the import to take longer than a standard parameter import. Volumetric imports load daily or monthly volume data for potentially many wells simultaneously — similar in scale to importing a large production dataset — so additional processing time is expected.

Performance Considerations

Volumetric imports and related operations take longer than standard parameter imports. This is expected and is a result of the volume of data involved:
  1. Each well may carry years of daily or monthly forecast volumes, compared to just a handful of parameters in a traditional import.
  2. Deleting a volumetric forecast or changing its type also takes longer than equivalent operations on parametric forecasts.
  3. Chart rendering plots every individual data point — not sampled intervals — which is accurate but more resource-intensive than a standard forecast chart.
Plan accordingly when working with large well sets, and allow additional time for import and processing operations to complete.

What Changes in the UI After Import

Modular Forecast
Once a volumetric forecast is applied, the following changes appear in

  1. Modular forecasting:
    1. Forecast type is shown as Volumetric
    2. The parameter table is replaced by the Volumetric Table, a read-only tabular view of your imported volumes. This table is a visual reference only — volumes cannot be edited, added, or deleted from this view currently.


    Alert
    Note: The editing chart does not currently display volumetric volumes. This is a known gap that will be addressed in a future release.

  2. Filtering
    1. Volumetric is available as a fourth filter option in the forecast filter (previously No Forecast, Rate, and Ratio; now Volumetric is added).



Parameter Download

When you export forecast parameters for a well that has a volumetric forecast, the download will include a line item indicating that the stream has a volumetric forecast type. No curve parameters will be included for that stream, since it is not a parametric forecast, but the label ensures the file accurately describes the forecast type for every stream.




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