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    PVTSIM Nova

  • PVTsim from 19.0 to 20.0

Updates and Bug Fixes

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.
  • 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.
  • UV Flash calculations might fail for T < 125 K due to an inappropriate lower T-limit.

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.
  • Metric Pressures in VIP Black Oil changed to be kPa instead of bar.

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.
  • Refined phase identification check in OLGA interface.

OLGA WAX

  • OLGA Wax interface extended with Wax Viscosity Correction Factors.

WEPS

  • Error corrected in Field Unit output.
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NEW FEATURES AND MODULES IN PVTSIM NOVA 5.1

IMPORT OF PVT DATA

  • UPGRADE TO PRODML 2.1
    • The option for importing an XML file in PRODML format now supports PRODML version 2.1.
  • IMPORT OF PVT DATA FROM EXCEL SHEET
    • The option for importing an XML file in PRODML format has been upgraded to support automated import of PVT reports in a Calsep specified Excel format (Calsep Excel file).
    • It is also possible to convert a PVT report in “Calsep Excel file” format to a PRODML 2.1 XML file.

MODEL UPDATE

  • THERMAL CONDUCTIVITY OF AQUEOS PHASE
    • Hydrate inhibitors taken into account when calculating the thermal conductivity of an aqueous phase.

NEW INTERFACE MODULE

  • INTERSECT COMP
    • Interface to Intersect Compositional.

HYDRATE

  • HYDRATE PT CURVE
    • The hydrate PT curve option has been updated to handle a sudden shift in hydrate temperature from dew to bubble point side for a narrow boiling gas mixture.

FLASH

  • T-BETA AND P-BETA
    • Enhanced robustness of T-beta and P-beta flash options for mixtures with aqueous components.

UNIT OPERATION

  • 3-PHASE SEPARATOR
    • Logic changed to let water follow oil until last separation stage.

INTERFACES

  • ECLIPSE BLACK OIL
    • Refined monotonicity check.
  • INTERSECT BLACK OIL
    • Unit specification added to interface file.
  • GEM
    • GEM interface updated to support T-dependent volume shift parameters.
  • OLGA
    • Artificial gas phase enthalpies forced to increase with increasing temperature.
  • UNISIM
    • UNISIM interface updated to support T-dependent volume shift parameters.

OTHER

  • LICENSE CHECK
    • The Flexlm license check in PVTsim was upgraded to Flexlm version 11.17.