• PVTsim from 21.2 to Nova 1

Updates and Bug Fixes


  • Input menus do not lock the program. Multiple input menus can be open simultaneously.
  • Interactive input check - blue(required input icons) and red (illegal input icons) react to input right away.
  • Number of user defined unit systems no longer limited to 4.

Fluid Management

New Plus Fluid

  • Composition
    • Pure component list shown in Fluid View Screen.
    • Easy to use Add/Remove component functions.
    • Extend to Cn function.
    • C7+ isomers function (include with carbon number fractions).
    • Uncertainty on Plus MW.
    • Lump C7+ MW and Densities.
  • Lumping
    • Stored with plus fluid.
    • Automated naming of C7+ defined fractions.
    • Automated naming of lumped defined components.
    • Lumping schemes (predefined and user defined).
  • PVT Data
    • Input of more properties for CME (no choice of gas/oil selection).
    • Input of compositions for Separator Test, Diff lib, CVD, Equilibrium Contact, Multi contact.
    • Input of critical point on swelling curve.
    • MMP, Equilibrium Contact and Multi contact all have separate PVT data entries.
  • Injection gases
    • Up to 5 different injection gases can be stored with a fluid. Once an injection gas is stored with a fluid, it can be associated with gas injection PVT data (Swelling, Equilibrium contact, Multi contact, MMP).

Common EoS

  • Preserve input for lumping setting.
  • Result is a Common EoS group stored in the database. The Common EoS group can be named.

Add to Common EoS

  • A plus fluid can be added to an existing Common EoS model.


  • Bottomhole samples
    • FVF from Sat P at Tres to standard conditions is a new property included in QC.
    • Refined check for OBM.
  • Separator samples
    • Separator oil FVF is a new property included in QC.

OBM Cleaning

  • Contaminated STO oil can be input and recombined with gas from a flash of the bottom hole sample to standard conditions.
  • Cleaning will generate a clean reservoir fluid with mud attached. PVT data measured on the contaminated fluid sample may be input for this fluid. The mud will be mixed in when simulating the PVT data.
  • Buttons to save the cleaned reservoir fluid, the contaminated reservoir fluid and the clean plus fluid are found on the fluid view for the clean reservoir fluid with mud attached.

Pure Component Database

  • Overview of main parameters for all components in the same screen.
  • Shift between PR or SRK parameters supported.

PVT & Regression


  • Critical point plotted on saturation point curve
  • Critical composition output

Plus Fluid Regression

  • Regression to equilibrium contact.
  • Regression to multi contact.
  • Regression to critical point on swelling curve.
  • Regression to gas injection experiments with multiple injection gases.
  • Regression to "Visc Data" points together with classical PVT data.
  • Plus MW Uncertainty automatically made Plus MW max adjustment.
  • Plus fluid regression setting is stored with the plus fluid in the database.
  • Regression
    • Fluid resulting from regression saved as "Temp"fluid in database.
    • Temp fluid is a sub-level fluid from original plus fluid (tree structure).
    • Regression history can be seen from Reg History tab.
    • Temp fluids can be saved in the database as permanent fluids.

Char Fluid Regression

  • All(non-kij)regression parameters are selected in same screen.
  • Regression settings are saved with char fluid in the database.

Common EoS w/ Plus regression

  • Preserve input for lumping settings and regression settings.
  • Dedicated PVT Data buttons for each fluid.
  • Plus MW uncertainty for each fluid is shown as read-only on main menu and is max Plus MW adjustment in the regression.
  • PVT data included for each fluid can be seen in overview form on main menu.
  • Result is a Common EoS group that can be named.

Common EoS w/ Char regression

  • Preserve input for regression settings.
  • Result is a Common EoS group that can be named.

Flow Assurance


  • Depowax cases are listed in the case explorer.
    • Export function exports a case w/fluids to a new or existing database.
    • Import function imports a case w/fluids to selected database.
  • Pipeline Topography plot
  • Start and End time for sources
  • Component Diffusion coefficients written in output


  • H2O allowed in inhibitor compositions.


  • In addition to inputting the n-paraffin content of all carbon number fractions in a fluid, it is now possible to also input the n-paraffin content of the plus fraction for a fluid.
  • Option for inputting the temperature at which Wax in STO is evaluated, for calculation and tuning purposes.


  • Dedicated option for adjusting LBC to CSP.
  • Dedicated option for wax viscosity tuning, and for Common EoS w/ wax viscosity tuning.


  • Merging plots by drag-and-drop preserves the original plots.
  • "Select All" and "Copy to Word" buttons on output sheets allow fast copying of all output to Word in an nice format.
  • "As Worksheet" button activates spreadsheet functionality on all output sheets.