User Options: Fit Settings

Inclining or Shallow Decline Transition (Oil, Gas, Condensate)

These options limit the length of inclining or very shallow forecasts. Inclining forecasts and shallow forecasts (defined by the value entered in Minimum Decline) are limited to the number of months entered in Incline period duration and Flat period duration. After the duration, a new exponential decline segment is started at the rate entered in Default nominal slope. See User Options: Product Specific.

Date Range for Fitting

These options control how Value Navigator auto-forecasts wells.

• All data: Value Navigator automatically determines how much production history is needed to calculate a decline for each well.
• Recent: Value Navigator only goes back the entered number of months from the Set the Current Month and calculates a decline using that history.
• Start of current fit to end of history: The fit is based on data from the beginning of the current fit to the end of production history.
• Fit decline trends within the date range: When selected, Value Navigator looks for individual trends within the specified range. Trends are prioritized based on how recent they are and how much data they conform to.

Backfit

• Only show the backfit on graphs when there is no auto fit source: If enabled, the backfit is not displayed on wells that have an auto fit source. On wells with manual declines, the backfit will be displayed.

Daily Data

• Allow fitting from daily data: Enable or disable fitting for daily data
• Use daily data until: Sets the transition point at which monthly data is used in fitting instead of daily data.

For the rest of the options, see the Inclining or Shallow Decline Transition section, above.