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Velocity Gradient plots show the speed of the gas within the flowpath compared to minimum lift velocities under similar pressure and temperature conditions.  These plots are activated through the Graphs->Velocity Gradient Plots menu.  This menu item is disabled until a run is made.

 

In the case below, a complex wellbore is loading up below 1500 feet where gas injection is taking place.

 

 

This plot compliments the Tubing pressure gradient plot as is shown in the case below.