News & Events
- September 20 - 22, 2010 SPE ATCE, Florence, Italy
- October 18-20, 2010 APOGCE 2010, Brisbane, Australia
- November 1-4, 2010 ADIPEC 2010, Abu Dhabi, UAE
- June 14, 2010 PVTsim 19.1 released
Release of PVTsim 18.1
April 23th, 2009
Updates and Bug fixes from PVTsim 18.0 to 18.1
Options/Models
Asphaltene
- Error corrected in option for tuning asphaltene amount to asphaltene onset pressure.
Depth gradient regression
- Changed logic to enhance match of observed compositional variation with depth.
Differential liberation
- Stage to atmospheric pressure may optionally be simulated as a continuous bleed off of gas.
Flash
- PH, PS and VT flash specifications extended to handle pure components.
Multi Contact experiment
- Column added to output identifying saturation point as either a bubble point or a dew point.
OLGA table interface
- Intelligrid with a Grid factor of 5 made default. This means a tighter TP-grid at conditions with two hydrocarbon phases than at conditions with only one hydrocarbon phase.
- Continuity problems cured in OLGA table for mixtures with two dew point temperatures.
- Robustness of table generation improved for mixtures with salts for low T and low P.
Prosper EoS
- Composition shown with more digits in Prosper EoS interface file.
QC module
- K-factor, Hoffmann and Mass Balance Closure plots extended with legends with component names.
- N2 taken out of K-factor evaluation in QC module as sample cylinder may be "contaminated" by N2. After this change correlation coefficient of K-factor plot must be > 0.98 to pass QC.
Regression
- Critical temperature by mistake not counted as data point.
- Data points and compositions of zero weight by mistake added to number of data points.
Saturation point option
- Extended to allow calculation of more than one saturation point at the time.
- Enhanced numerical robustness of saturation point algorithm.
Saphir interface
- A new selection permits the user to distinguish between i) average gas and liquid properties or ii) only gas properties.
Slimtube
- Max. number of time steps increased from 2000 to 20000.
Unit Operations
- Compressor and valve options extended to handle pure components.
General
Interfacial tension
- Correlation for interfacial tension between hydrocarbon and water modified from API correlation to that of Firoozabadi and Ramey (1988). Only DepoWax still uses API correlation.
