Fluid Property
Characterization Tool

WinProp is an integral component in advanced reservoir simulation modelling and is invaluable for multi-phase and special processes, and where compositional variations exist.

EoS Characterization
Tune EoS to accurately match laboratory results and predict fluid behavior.


  • Analyze two EoS models - surface (separator) conditions and reservoir conditions
  • Choose from multiple EoS models, E.g. Peng-Robinson and Soave-Redlich-Kwong EoS models (2 and 3 parameter versions), to match lab data
  • Create separate EoS models for surface (separator) conditions and reservoir conditions
  • Regression on composition and properties to allow for easy matching of lab data
  • Automatic parameter selection and built-in parameter bounds simplifies regression process
  • Linear temperature-dependent volume shift model to accurately match lab calculated density
  • Match separator data separately from PVT data gathered at reservoir temperature using differential liberation experiments
  • Group parameters for regression and apply varying weights to specify importance of matching distinct parameters

Reservoir Fluid Characterization
Understand property distribution within a reservoir fluid system, under different depletion scenarios.


  • Exponential, two-stage exponential, and gamma distribution functions for characterization calculations
  • Fraction splitting and component lumping to simplify creation of pseudo-components
  • Specify own lumping criteria or use WinProp internal algorithm to determine lumping criteria

Miscibility Prediction
WinProp’s multiple contact miscibility option performs calculations under condensing, vaporizing, or condensing-vaporizing drives.


  • User-friendly component lumping and fraction splitting options
  • Extensive library of hydrocarbon and non-hydrocarbon components
  • First contact miscibility pressure calculation to match data and understand the fluid mixture properties
  • Differential evolution algorithms provides more stable search for minimum miscibility pressure (MMP) calculations
  • Multiple mixing cell method of Ahmadi and Johns to calculate minimum miscibility pressure
  • Create ternary diagrams to graphically interpret miscibility mechanisms and calculate how to achieve multi-contact miscibility
  • Phase split calculation of Li, Johns and Ahmadi for multi-contact miscibility calculations
Asphaltene and Wax Precipitation Modelling
Save time by quickly characterizing Asphaltene and Wax deposition fluid model for use in compositional simulation.


  • Multi-component solid solubility model is coupled with Equations-of-State (EoS) for descriptions of asphaltene or wax precipitation
  • Model up to three fluid phases in equilibrium with the precipitate as a multi-component solid

Aqueous Phase Properties
Model the solubility of CO2, H2S, and light hydrocarbons in water of varying salinity.


  • Accurately predict water content of gases
  • Extensive library of geochemical reactions for rock mineralogy interaction with the aqueous phase
  • Standard phase property table also includes entropy, enthalpy and heat capacity

Fundamental Calculations
Improve your understanding of the reservoir fluid and phase behavior with advanced PVT and thermodynamic calculations.


  • Isenthalpic flash and multi-phase flash
  • Saturation pressure and temperature
  • PT, PX, and TX envelopes, with quality lines, available for two and three-phase calculations
  • Ternary Diagrams
  • Newton iteration for performing negative flashes in difficult regions

SPE Technical PapersWant to learn more?
Check out the SPE technical papers focused on WinProp - you'll have an opportunity to learn from our customers and our R&D team on innovative applications of WinProp in the field. Find out more...