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 50×50 to 200×200 points.
PIPESIM
Table limit extended from 20×20 to 50×50 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 100×100 points. IntelliGrid allowed for all tables having at least 50×50 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.
