The purpose of this article is to explain the DCA Wrangler Decline button and Editing Declines.

Decline Button

Pressing the Decline button will generate declines for the wells that are currently marked using the Autocast algorithm. 

White Paper coming soon!

Editing Declines

After the decline has run for a well and the user is in the Single Well View, the user can edit the decline curves for each stream with hotkeys (as described in the Help Menu) or by using the control points right on the plot itself. As the user adjusts the curve, the parameters update in real-time and are overlaid on the chart. 

The user can also edit previously Saved declines brought in to the project with the Sync button. To edit a saved decline for a well, the user can either anchor by it or update it for each well. In the manual well mode, the user can click on a model name to edit its curve (See first GIF below). When the model name is clicked, it copies the curve to active.  The user can then update active and save the active curve.

Option Description
Adjust the Start Date and Qi (Initial Rate).

IMPORTANT NOTE: Qi does not have to be on the production curve. you can set the Start Date and Qi to anywhere on the plot.
Adjust the B Factor.
Adjust De (Effective Decline)

Identifies the start of Exponential function.

Users can also manually edit the linear piecewise parameters for GOR and Yield. 

Option Description
Adjust each breakpoints for each segment.