Updates and bug fixes in PVTsim from 20.0 to 20.1

September 25th, 2011

Depth gradient option enhanced to ensure consistent P and Psat at Gas Oil Contact also for high vertical temperature gradients.
For some properties incorrect derivatives returned from Flash Open Structure.
Enhanced numerical robustness of asphaltene PT-curve option.
Improved phase identification in asphaltene PT flash.
Eclipse Black Oil output format changed to handle viscosities as high as 1,000,000 cP.
Bug corrected in logic for calculating solubility of salt in H2O-MEG solutions.
Bug corrected in logic for regression on Peneloux volume correction factors for already characterized fluids.
C6 density erroneously corrected when match of C7+ liquid densities specified in a characterized regression.
Inconsistent viscosity results reported by different PVTsim options for near critical fluids.
Phase derivatives of density and entropy added to Flash Open Structure for PT non-aqueous, PT aqueous, PH and PS specifications.
Flash Open Structure extended to also give derivatives from a PT aqueous flash when aqueous properties calculated from Water Package.
Asphaltene Module returned incorrect Cv for single phase fluids.
Rs vs. depth option in Eclipse Black Oil interface did not work with K-factors/Split-factors.
Incorrect densities from Water Package for pressures in the (approximate) interval fro 750 atm to 1000 atm and temperatures below approximately 263.15 K.
Some tie-line compositions displayed as zeros when 3 phases found at MMP.