Updates and bug fixes in PVTsim from 19.0 to 20.0 February 23, 2011 New Options/Models * Wax Open Structure dll. * Interface to STARS simulator from CMG. * Import of compositional files from Eclipse Comp Updates and Bug Fixes General * Minor adjustment (+ 0.07%) of Gas Constant in cal/mol K. * Improved numerical robustness of procedure for converting water cut to water mol%. * Improved viscosity results for pure glycols and for water-glycol and water-methanol mixtures * Temperature limit below which for viscosity of aqueous components and mixtures assumed to be constant lowered from 243.15 K to 223.15 K. * Help updated with info relevant for users of Office 2010. Fluid Management * Enhancement of options for recombining two fluids to specified saturation point. * Bug corrected in “Clean for Mud” module. GC compositions input in weight% were handled incorrectly. PVT & Regression * Characterized Regression option extended to optionally update Peneloux volume shift parameters to comply with component liquid densities (always done with Plus Regression). * Fix to properly catch missing saturation point in CME, CVD, DL and Viscosity experiment simulations options. * Slimtube option extended with info about lowest input pressure developing miscibility. * Plus fluid regression logic enhanced to ensure optimum density results when Peneloux volume corrections selected as regression parameters. Cpen parameter added to output. Flash & Unit Operations * Logic changed to have subsequent flash specifications executed after one with aqueous phase supersaturated with salt. * Option added for specifying upper limit for water dew point line in phase envelope option. Flow Assurance * Wax temperature calculation could hang in rare cases. * Error corrected in code for regressing to viscosity data for wax inhibited systems. * Improved numerical robustness of asphaltene PC-SAFT option. * Bug corrected in Hydrate module for calculation of the water-gas surface tension. Open Structure * Memory leak in SetCalculationError of Hydrate Open Structure dll closed. Interface Options Eclipse Black Oil * Water compressibility output in PVCO and PVDO/PVDG tables erroneously calculated at standard conditions. Corrected to be calculated at the saturation pressure at reservoir temperature. * Extended with combinations of PVTO/PVTDG and PVDO/PVTG. * Enhanced procedure for correcting for non-monotony. * Updated for handle Split-factor of 1 for all components except for one component (which component will form a pure phase). Vip Black Oil * Extended with BOGTAB keyword. Prosper/Mbal * Updated for handle Split-factor of 1 for all components except for one component (which component will for a pure phase). OLGA (table based) * A new keyword STDLIQDENSITY added to OLGA two phase table for fluids containing water. OLGA can read this from versions 6.2 and 5.3.4. Only Key format table. * Improved numerical robustness of OLGA interface option for fluids with low concentration of water. OLGA Wax * OLGA Wax interface extended with Wax Viscosity Correction Factors. Weps * Error corrected in Fluid Unit Output