Updates and Bug fixes from PVTsim 17.2 to 17.3
- Error corrected in saturation point logic that might cause failure of regression when including swelling data.
- Limit on number of cells in slimtube option increased to 2000. Time step and cell output frequency introduced.
- Tabulated saturation pressure in Prosper/Mbal interface changed to always be the higher one (relevant for temperature tabulation points with two saturation point pressures).
- Plus regression erroneously changed the Peneloux parameter of CO2 marginally. This caused problems e.g. in MMP simulations with a CO2 "No Plus" fluid as injection gas.
- Error corrected in DepoWax causing the simulation results to be the same after all time steps.
- The Save Phase option erroneously assigned asphaltene components an asphaltene fraction of 0.0. Corrected to be 1.0.
- Error corrected in weaving option for asphaltene components.
- Too low a thickness of laminar film layer in DepoWax caused too much wax deposition
Updates and Bug Fixes in PVTsim from 17.1 to 17.2
- Numerical robustness of MMP algorithm improved for CO2 as injection gas. More informative error message in case of failure.
- Bug corrected in Eclipse Black Oil table generation for keyword PVTG. Bug seen for undersaturated properties tabulated at input pressure stages and "const comp extrapol". No gas properties generated for P > dewpoint pressure.
- Component names missing in OLGA Wax table for components with no blanks among first 10 characters of component name.
- Bug corrected in Same Pseudos option causing incorrect component mole%'s for Plus-fluids with only defined C7, C8 and/or C9 components.
- Unrealistic GC-compositions might cause crash in QC mud-contamination check.
- Check implemented for license file location in Registry on Vista.
- Bug corrected in DepoWax for surface tension of gas-liquid, when water present.
- Correction in calculation of heat transfer in DepoWax for Petukov-ESDU correlation.
- Incorrect cloud point temperatures in OLGA Wax table if Number of P-points > Number of T-points.
Updates and Bug Fixes in PVTsim from 17.0 to 17.1
- Component densities transferred via Hysys interface changed from input densities to be densities calculated with Peneloux corrected EoS.
- Hydrate code corrected to also account for Hydrate H in average energy properties.
- Saturation point option changed to work for more than 1 saturation point at the time.
- Intelligrid option in OLGA interface changed to work correctly also for fluids containing aqueous components.
- Numerical robustness of OLGA saturation point algorithm improved for narrow boiling mixtures.
- Section length term 'turned off' in correlations used to calculate Hinner as the term is only relevant for very short pipes.
- Changed Schema validation in Open Structure modules to keep consistency UniSim design.
- Error corrected in lumping. It appeared when regressing on already characterized fluids and regression option accessed from component input menu.
- Enhanced smoothing of CSP viscosity in region between classical CSP and heavy oil viscosity model.
- Water properties from water package available as an option in Flash Open Structure.
- Error corrected in Property Generator for density derivatives of salt water.
- Warning about unavailable database changed to distinguish between "database open by other user" and "database format not recognized".
- FLEXlm software license system updated to version 11.5 to have Open Structure applications run from Excel under Vista.
- Error corrected in correlations for solubility of salts with crystal water.
- Inaccurate minimum inhibitor requirements in Hydrate module if more than one P&T set specified and water phase contains salt.
- Improved accuracy water densities from water package for pressures > 1000 bar/14700 psia.
Updates & Bug Fixes
- September 17th, 2007PVTsim 16.2 released
- January 21st, 2008PVTsim 17.0 released
- March 5th, 2008PVTsim 17.1 released
- June 16th, 2008PVTsim 17.2 released
- July 13th, 2008PVTsim 17.3 released
