Page 480 - KAPPA - Ecrin v4.30 tutorials

Ecrin v4.20 - Doc v4.20.01 - © KAPPA 1988-2011 Amethyste Guided Session #1 • AmeGS01 - 14/19
E01 • Well Performance Analysis
As there is a valid VLP and a valid IPR models, a Well Performance Analysis (WPA) plot is
created. This WPA plot is a cross plot of the inflow and the outflow at the IPR calculation depth.
The intersection point is marked on the plot and moving the cursor on top of it, displays
pressure and rate. The status window also indicates this information as well as the reference
flow correlation and inflow model.
Fig. E01.1 • WPA plot
F01 • Sensitivity
Following the characterization of the well behavior under different flow conditions, the next
step is to optimize the well deliverability. This can be performed with a sensitivity analysis.
Click on the Sensitivity icon . The dialog that follows (Fig. F01.1) will allow specifying the
parameters to run the sensitivity on. In this example, we will do a sensitivity study on the
geometrical skin and the well head pressure. We will also generate the well traverses.
For each VLP sensitivity value (e.g. wellbore parameter, flowline parameter or production
condition), Amethyste calculates the well response to the different production conditions
defined in the VLP section, keeping unchanged any parameter but the selected sensitivity
variable. Amethyste will do the same for each IPR sensitivity value (e.g. reservoir or
completion parameter), calculating the inflow for different rates up to the Absolute Open Flow
Production (AOFP).
In the IPR list of sensitivity variables, select the Geometrical skin and enter the values [-1,
-3, 1, 3] as shown in picture F01.1. Proceed the same way with the WHP sensitivity variable
[250, 500, 750] of the VLP list of sensitivity variables. Require the sensitivity calculation on
the traverses by checking the corresponding box.