PVTi Phase plots

[Sequestrator]

Hi to everyone,
I have one simple problem - lets load to PVTi binary mixture. Then, let's only click on Zi to plot phase envelope. Why the envelope sometimes looks weird?

Or, let's take dry gas composition from Whitson's Phase Behavior Monograph (Table 2.1). How to make first phase plot, without simulation and regression, only to plot the first two-phase estimate? 50 % liquid quality line plots only for about 10 bars, what happens with quality lines in PVTi?

I'm not concerned that plot will give wrong data, but, why the reseults are messed up?

[zaheer.jamali]

click on view button top of the page

View >>>Sample>>>>phase plot>>>>no on line max 10 ok