PVTSIM Nova 3.1
PACKAGES MODULES
PVTsim is a PVT simulation package for use by PVT laboratories and in reservoir and flow assurance studies. PVTsim is divided into a number of modules so that you can purchase Standard PVTsim Packages tailored for different application areas, or customize a package according to your needs. The individual modules and standard packages are found in the menu on the left.
FLUID HANDLING
GC ANALYSIS INPUTDedicated 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 INPUTA 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 COMPOSITIONOBM 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 EOSA 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 MENUPVTsim 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 MODELHydrate.Asphaltenes.
ASPHALTENES
FULL ASPHALTENE PHASE ENVELOPEFor 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 FlowTable limit extended from 5050 to 200200 points.PIPESIMTable limit extended from 2020 to 5050 points.ECLIPSE BLACK OILEclipse Black Oil keyword APIVD supported for tabulating APIs versus depth.SAPHIRSaphir interface extended to optionally output property tables in Petex format, which format can be read by Saphir.NEWUNISIM DESIGN.tNAVIGATOR.
FLUID HANDLING
GC ANALYSIS INPUTDedicated 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 INPUTA 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 COMPOSITIONOBM 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 EOSA 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 MENUPVTsim 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 MODELHydrate.Asphaltenes.
ASPHALTENES
FULL ASPHALTENE PHASE ENVELOPEFor 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 FlowTable limit extended from 5050 to 200200 points.PIPESIMTable limit extended from 2020 to 5050 points.ECLIPSE BLACK OILEclipse Black Oil keyword APIVD supported for tabulating APIs versus depth.SAPHIRSaphir interface extended to optionally output property tables in Petex format, which format can be read by Saphir.NEWUNISIM DESIGN.tNAVIGATOR.
FLUID HANDLINGCOMMON EOSSampling data preserved on fluids resulting from Common EoS operations.QCRefined OBM check in QC module.LUMPINGTwo 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 VIEWOn 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 CHECKRefined check for too low C7+ densities input
MODELS
CPA SOLVATIONFull 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 PARAMETERSThe following additional components can be used with CPA: EtOH, MEG, DEG, and TEG.HV PARAMETERSEtOH HV parameters updated.SRK HV interaction parameters for C1-ZnBr2 updated.
PVT RESERVOIR
COMPARE WITH DATASimulated phase envelope plotted for comparison with experimental saturation pressures.PVT SIMULATIONSCVD output updated to show correct residual oil PT conditions.Input of gas composition enabled for Diff Lib stage at standard conditions.
FLASH PROCESS
PHASE ENVELOPERobustness of search for 3-phase area and for simulations with CPA improved.PROPERTY GENERATORPhase identification updated to correctly handle systems with only aqueous components.
ASPHALTENES
ONSET PRESSURESImproved calculation stability of Asphaltene PT curve and Asphaltene Pressure options.
FLOW ASSURANCE
HYDRATEMinimum inhibitor option updated to return amount of each inhibitor component for multi-component inhibitors.DEPOWAXDepoWax 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 WAXUpdated to correctly handle systems with only two phases present.OPEN STRUCTURE HYDRATEUpdated to correctly handle systems with a free salt phase and systems with more than four phases.OPEN STRUCTURE SAMPLESNew Open Structure sample for Separator Conditions Optimization added to the Open Structure Launch Menu.
INTERFACES
OLGA LEDA FlowDefault for IntelliGrid increased to 100100 points. IntelliGrid allowed for all tables having at least 5050 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.PIPESIMHeader lines removed causing problems when reading PVTsim generated tables in Pipesim.NEXUSSaturated properties above the saturation pressure of the reservoir fluid generated by adding gas/condensate instead of using constant composition extrapolation.ECLIPSE BLACK OILK-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/MBALCalculation 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.HYSYSDirect 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/IMPORTThe 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.
FLUID HANDLINGCOMMON EOSSampling data preserved on fluids resulting from Common EoS operations.QCRefined OBM check in QC module.LUMPINGTwo 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 VIEWOn 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 CHECKRefined check for too low C7+ densities input
MODELS
CPA SOLVATIONFull 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 PARAMETERSThe following additional components can be used with CPA: EtOH, MEG, DEG, and TEG.HV PARAMETERSEtOH HV parameters updated.SRK HV interaction parameters for C1-ZnBr2 updated.
PVT RESERVOIR
COMPARE WITH DATASimulated phase envelope plotted for comparison with experimental saturation pressures.PVT SIMULATIONSCVD output updated to show correct residual oil PT conditions.Input of gas composition enabled for Diff Lib stage at standard conditions.
FLASH PROCESS
PHASE ENVELOPERobustness of search for 3-phase area and for simulations with CPA improved.PROPERTY GENERATORPhase identification updated to correctly handle systems with only aqueous components.
ASPHALTENES
ONSET PRESSURESImproved calculation stability of Asphaltene PT curve and Asphaltene Pressure options.
FLOW ASSURANCE
HYDRATEMinimum inhibitor option updated to return amount of each inhibitor component for multi-component inhibitors.DEPOWAXDepoWax 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 WAXUpdated to correctly handle systems with only two phases present.OPEN STRUCTURE HYDRATEUpdated to correctly handle systems with a free salt phase and systems with more than four phases.OPEN STRUCTURE SAMPLESNew Open Structure sample for Separator Conditions Optimization added to the Open Structure Launch Menu.
INTERFACES
OLGA LEDA FlowDefault for IntelliGrid increased to 100100 points. IntelliGrid allowed for all tables having at least 5050 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.PIPESIMHeader lines removed causing problems when reading PVTsim generated tables in Pipesim.NEXUSSaturated properties above the saturation pressure of the reservoir fluid generated by adding gas/condensate instead of using constant composition extrapolation.ECLIPSE BLACK OILK-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/MBALCalculation 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.HYSYSDirect 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/IMPORTThe 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.
An Equation of State (EOS) model is the foundation for all types of PVT simulations performed by reservoir, flow assurance, process and PVT lab engineers. In PVTsim Nova reservoir fluid compositions are easily input together with PVT and EOR data. The EOR data including compositions of injection gas are now be stored along with the fluid compositions in PVTsim Nova.Regression can now be performed on all types of PVT and EOR experiments, which makes PVTsim Nova a versatile tool for developing of Common EOS models for reservoir fluids, which undergoes miscible gas injection. A fast evaluation of the regression results can now be achieved in seconds using the Compare with Data option introduced in PVTsim Nova and in combination with Regression trail option it is easy to follow the sequence of regression steps from the Plus fluid to the final EOS model.The videos below show some of the tasks that can be carried out in PVTsim Nova.
