PVTsim Nova 3.0 to 4.0

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NEW FEATURES AND MODULES

NOVA APPS

  • AUTO QC
    • Automated quality check and correction of fluid compositions.
  • AUTO EOS
    • Automated EoS model development.
  • SEPARATION
    • Flowsheeting option.

MODEL AND MODEL PARAMETERS

  • PR-CPA
    • Extension of Cubic Plus Association (CPA) model to be applicable with the Peng-Robinson EoS.
  • WAX DEPOSITION
    • Wax deposition simulator DepoWax extended to support the Matzain wax deposition model as an alternative to the RRR model.
  • CaBr2
    • Revised interaction parameters for H2O-CaBr2 and CaBr2-MEG to improve hydrate predictions at high pressure.
  • PC-SAFT CHARACTERIZATION
    • Improved PC-SAFT characterization (SPE-187170-MS).
  • HEAVY OILS
    • Improved Heavy Oil Characterization.

PC-SAFT

  • REGRESSION
    • Tuning to PVT data using PC-SAFT EoS.
  • BLACK OIL INTERFACES
    • PC-SAFT model available in the interface options to Eclipse Black Oil, VIP Black Oil, Nexus Black Oil. and IMEX.

FLASH

  • MULTI FLASH
    • The number of phases handled by Multi Flash option increased from 4 to 5.

PVT SIMULATION AND REGRESSION

  • CVD FOR OILS
    • A CVD experiment for oil mixtures can be simulated and experimental data used in regression.

PHASE MAPPING

  • PHASE MAPPING PLOT TOOL
    • Option to plot type and number of phases (max. 5) in a user defined P & T range.

ASPHALTENES

  • ASPHALTENE DATA
    • Data for asphaltene onset pressures and for Asp in STO can be stored in PVTsim Nova database.
    • Asphaltene simulation results can be compared with experimental data using a new Compare with Asphaltene Data option.

HYDRATE

  • PH FLASH
    • Hydrate PH flash option introduced, which enables simulation of the heat to be added to melt hydrates.

SCALE

  • PT GRID OPTION
    • Scale formation can be simulated for an entire PT- grid.
    • 2D and 3D plot options showing how scale precipitation develops with P and T.

WATER ANALYSIS

  • WATER ANALYSIS CONVERSION
    • Water Analysis Conversion option updated to automatically store converted fluid composition in PVTsim Nova database.

INTERFACES

  • PROSPER EOS
    • New option for import of Prosper EoS files.
  • MULTI PHASE METERS
    • Multi Phase Meter interface option updated to support Roxar units.

UPDATES AND BUG FIXES

FLUID HANDLING

  • MIX
    • Mix option updated to give correct CSP viscosities for mixtures of viscosity tuned fluids.
  • RECOMBINE
    • Lumping kept when two common EoS fluids are recombined.
  • DELUMP
    • Inconsistency between CPA and SRK parameters corrected.
  • CHARACTERIZED REGRESSION
    • Characterized regression updated to support tuning on Vc not only for viscosity experiments, but also for viscosity data points.
  • CLEAN FOR MUD
    • Clean for mud “STO Oil + Gas” option updated to also work for extended GC fluids.
  • QC
    • Acceptance criterion for STO oil density changed ±0.02 g/cm3.

MODELS AND MODEL PARAMETERS

  • MEG-TEG
    • MEG-TEG interaction parameters updated to avoid phase split in systems with both components present.

PVT & RESERVOIR

  • DEPTH GRADIENT
    • Bo and Bg included in output and plot.
  • VISCOSITY DATA FOR GAS CONDENSATES
    • Viscosity experiments for gas condensates can be simulated and used in regression.
  • VISCOSITY EXPERIMENT
    • Viscosity experiment can be simulated as a CVD experiment as an alternative to a differential liberation experiment.
  •  SLIMTUBE
    • Updated to delete temporary output files.
    • Phase Viscosities option corrected to give the correct relative mobility of gas and oil.
    • Phase Viscosities option made the default choice.
    • Default number of cells and time steps modified to give a better match of the recovery at pressures below MMP.
  • DEPTH GRADIENT
    • Bug corrected to give the right CSP viscosities in depth gradient option.  
  • DIFFERENTIAL LIBERATION EXPERIMENT
    • Bleed made default for the pressure stage to atmospheric pressure.

OBM CLEANING

  • C7+ ISOMERS
    • C7+ isomers allowed in contaminated fluid compositions when estimating weight% contaminate of STO oil.

FLASH & PROCESS

  • H2S
    • Updated to work when H2S amount input as weight% or mg/l of Total Mixture.
    • Column header for H2S partition coefficient corrected from Aq/Liq to Liq/Aq.

ASPHALTENES

  • ASPHALTENE PHASE ENVELOPE
    • Minimum temperature for Full Asphaltene Phase Envelope can be defined by user.
  • ASPHALTENE TUNING
    • Updated to give same tuning results before and after Asp/non-Asp split.
  • TAR MATS
    • Asphaltene weight% is included in output from Asphaltene Tar Mats option.

FLOW ASSURANCE

  • WAX DEPOSITION SIMULATOR DEPOWAX
    • Simulation time corrected for output in the unit of Day(s).
  •  SCALE
    • Output concentrations of CO2 and H2S corrected.
    • Molecular weight of acetic acid corrected.
    • Corrections made of gas solubilites at high pressure and pH far away from scale precipitation.

WATER ANALYSIS

  • ION CONCENTRATIONS
    • Unit for ion concentrations changed from mg/l H2O to mg/l salt water.

INTERFACES

  • ECLIPSE COMPOSITIONAL
    • Bug corrected to solve Eclipse Comp Import issue.
    • COMPVD compositions output with more digits to ensure mole fractions add up to 1.0.
  • OLGA COMPOSITIONAL TRACKING
    • Save Fluid option modified to save characterized fluid instead of plus fluid.
  • ECLIPSE BLACK OIL  
    • Rso output in MScf/bbl with PVCO format.
    • Rv’s output for multi stage separators corrected for cases with temperature increase from one separator to the next one.
    • Bug corrected in API versus depth option.
    • Reference pressure and reference depth output in Rs/Rv and API vs. Depth tables.
  •  OLGA
    • Updates to always have vapor enthalpies increase with temperature at a given pressure.

LICENSE SYSTEM

  • UPDATES
    • Correct message given when all PVTsim licenses are occupied.
    • License Manager (LMTOOLS) shifted to newer version.

DATABASE

  • DATABASES OF OLDER FORMAT
    • Option to open PVTsim Databases of versions 19-21 reintroduced.
  • NEW COMPONENT
    • 2,2,4 trimethyl pentane added to pure component database.

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