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    PVTSIM Nova

PVTsim Nova is a versatile PVT simulation program developed by Calsep for reservoir engineers, flow assurance specialists, PVT lab engineers and process engineers. PVTsim Nova is an upgrade of the PVT simulation package PVTsim.

PVTsim Nova complies to the standards of a modern .NET application ensuring full support from the Microsoft development platform.

PVTsim has been used by leading oil producing and operating companies throughout the world.

Based on an extensive data material collected over a period of more than 30 years, PVTsim Nova carries the information from experimental PVT studies into simulation software in a consistent manner and without losing valuable information on the way.

PVTsim Nova allows reservoir engineers, flow assurance specialists and process engineers to combine reliable fluid characterization procedures with robust and efficient regression algorithms to match fluid properties and experimental data. The fluid parameters may be exported to produce high quality input data for reservoir, pipeline and process simulators.

PVTsim Nova is petroleum phase behavior at the tip of your fingers.

NEW FEATURES AND MODULES IN PVTSIM NOVA 3.0

FLUID HANDLING

  • GC ANALYSIS INPUT
    • Dedicated input option for GC analyses to C30+ or higher. Mole%’s or weight%’s of components and carbon number fractions including C7+ isomers can be input in the order reported in a standard PVT report along with C7+ MW and density.
  • TBP ANALYSIS INPUT
    • A TBP analysis can be input with measured weight% vs. temperature. PVTsim will convert it to a Plus Fluid and save it in the fluid database.
  • CLEAN FOR MUD WITHOUT MUD COMPOSITION
    • OBM cleaning option no longer requires input of a mud composition when reservoir or STO oil composition is given to at least C36+.
  • ADD TO SINGLE FLUID EOS
    • A Plus fluid can be characterized using the EoS model of an existing characterized fluid. It will create a common EoS group consisting of the two fluids.

MODELS

  • POLAR COMPONENT DROP DOWN MENU
    • PVTsim supports Huron and Vidal (HV) and CPA as extensions to a cubic EoS for mixtures with polar component. A drop down menu has been introduced for choosing between HV, CPA and Classical. This is to visualize that a cubic EoS model developed for a reservoir fluid can still be used after adding water and other polar components and that the user can choose between the three Polar Comps models.
  • ADDITIONAL MODULES SUPPORTING CPA MODEL
    • Hydrate.
    • Asphaltenes.

ASPHALTENES

  • FULL ASPHALTENE PHASE ENVELOPE
    • For fluids containing asphaltene components it is possible to plot the full phase envelope and get a complete overview of which phases (gas, oil and asphaltene) are present in different PT regions.

EMULSION VISCOSITY

  • New option for calculating and plotting emulsion viscosities.

INTERFACES

  • OLGA & LEDA Flow
    • Table limit extended from 50x50 to 200x200 points.
  • PIPESIM
    • Table limit extended from 20x20 to 50x50 points.
  • ECLIPSE BLACK OIL
    • Eclipse Black Oil keyword APIVD supported for tabulating API's versus depth.
  • SAPHIR
    • Saphir interface extended to optionally output property tables in Petex format, which format can be read by Saphir.
  • NEW
    • UNISIM DESIGN.
    • tNAVIGATOR.

UPDATES AND BUG FIXES

FLUID HANDLING

  • COMMON EOS

    • Sampling data preserved on fluids resulting from Common EoS operations.

  • QC
    • Refined OBM check in QC module.
  • LUMPING
    • Two additional lumping schemes designed for use with gas condensates are included in PVTsim Nova 3. One is for heavy lumping of the fluid, the other is for normal lumping. The new gas condensate lumping schemes can be selected from the Lumping Schemes drop down menu on the Lumping tab.
    • PVTsim Nova 2.0 would crash at upstart if the user had set a custom lumping scheme as default in PVTsim Nova 1. PVTsim Nova 3 will reset a Nova 1 custom default lumping scheme to PVTsim default.
  • FLUID VIEW
    • On rare occasions users were getting a message saying they had to enter text in one of the fields Well, Test, etc. on the Fluid View even though they had input text. That is no longer happening.
    • n-Paraffin tab only visible when checkbox is checked.
  • DENSITY CHECK
    • Refined check for too low C7+ densities input

MODELS

  • CPA SOLVATION
    • Full solvation matrix implemented, allowing solvation between any component pairs, including asphaltene components.
    • Pal & Rhodes emulsion viscosity results were incorrect when the water volume fraction for a relative viscosity of 100 was higher than inversion point. This bug has been corrected.

MODEL IMPROVEMENTS

  • CPA PARAMETERS
    • The following additional components can be used with CPA: EtOH, MEG, DEG, and TEG.
  • HV PARAMETERS
    • EtOH HV parameters updated.
    • SRK HV interaction parameters for C1-ZnBr2 updated.

PVT & RESERVOIR

  • COMPARE WITH DATA
    • Simulated phase envelope plotted for comparison with experimental saturation pressures.
  • PVT SIMULATIONS
    • CVD output updated to show correct residual oil PT conditions.
    • Input of gas composition enabled for Diff Lib stage at standard conditions.

FLASH & PROCESS

  • PHASE ENVELOPE
    • Robustness of search for 3-phase area and for simulations with CPA improved.
  • PROPERTY GENERATOR
    • Phase identification updated to correctly handle systems with only aqueous components.

ASPHALTENES

  • ONSET PRESSURES
    • Improved calculation stability of Asphaltene PT curve and Asphaltene Pressure options.

FLOW ASSURANCE

  • HYDRATE
    • Minimum inhibitor option updated to return amount of each inhibitor component for multi-component inhibitors.
  • DEPOWAX
    • DepoWax Case Explorer can now be reached using the keyboard shortcut Ctrl+Shift+W.
    • DepoWax cases can now have names up to 80 characters long.
    • Bug corrected which caused incorrect wax deposition profiles in simulations with source fluids when either feed or source fluid(s) contained defined component(s) not in the other fluid(s).

OPEN STRUCTURE

  • OPEN STRUCTURE WAX
    • Updated to correctly handle systems with only two phases present.
  • OPEN STRUCTURE HYDRATE
    • Updated to correctly handle systems with a free salt phase and systems with more than four phases.
  • OPEN STRUCTURE SAMPLES
    • New Open Structure sample for Separator Conditions Optimization added to the Open Structure Launch Menu.

INTERFACES

  • OLGA & LEDA Flow
    • Default for IntelliGrid increased to 100x100 points. IntelliGrid allowed for all tables having at least 50x50 points.
    • Bug corrected, which would influence results when Cn-dep (T-dep) mixing rule used.
    • Number of Specific Pressure and Temperature points input in OLGA Wax no longer have to be equal.
  • PIPESIM
    • Header lines removed causing problems when reading PVTsim generated tables in Pipesim.
  • NEXUS
    • "Saturated properties" above the saturation pressure of the reservoir fluid generated by adding gas/condensate instead of using "constant composition extrapolation".
  • ECLIPSE BLACK OIL
    • K-factor and Split-factor input echoed in Rv/Rs vs. Depth table.
    • Eclipse Black Oil interface updated to output PVDG properties for pressures below saturation pressure for oil mixtures.
    • Eclipse Black Oil interface option extended to support saturated and undersaturated properties for all input pressure stages.
    • Default number of equidistant pressure stages set to 29. That is to avoid Eclipse introducing “negative oil and gas compressibilities” by interpolation in PVTsim generated tables.
  • PROSPER/MBAL
    • Calculation of Bg in Prosper and Mbal interfaces updated to comply with specification from vendor (Petroleum Experts).
    • Prosper/Mbal interface updated to support extended output format in addition to the standard format. The extended format outputs more properties, which will ensure more consistency with PVTsim, but requires some manual input in Prosper/Mbal.
    • Prosper EoS interface updated to display more digits to always be consistent with PVTsim.
  • HYSYS
    • Direct import of Hysys interface files from PVTsim into Hysys available from Hysys 8.8 CP1.
    • Bug corrected, which would influence results when Cn-dep (T-dep) mixing rule used.
  • CHC FILE EXPORT/IMPORT
    • The CHC file format present in PVTsim 21 and earlier has been reintroduced. CHC files can be written from the OLGA Comp Tracking option and imported from OLGA Comp Tracking Import option.

OTHER

  • Communication with network suppressed when PVTsim accessing Sentinel Superpro dongle. Otherwise network communication may cause malfunction of dongle.
  • New density unit: pounds per gallon.
  • Installation package for Open Structure 64 bit updated to install Open Structure 32 bit correctly.