Multiflash Overview

Release Note

About Multiflash 7.1

Following the release of version 7.0, Multiflash 7.1 aims at the consolidation and refinement of functionalities introduced in 7.0 and at the introduction of new tools and functionalities to enhance and simplify the workflows of production and flow assurance engineers. In version 7.1 we continue with the progressive coverage of thread-safe models, initiated with Multiflash 6.2 and 7.0. Upon completion of the process, all the models initially coded in Multiflash will be available for thread-safe simulations and parallel computation.

With the release of MF 7.1 we also extend our range of modelling capabilities, including new variants (Twu) of the most common cubic equations of state, Peng-Robinson and Redlich-Kwong-Soave, including Peneloux volume shift and a new formulation for the fitting of vapor pressure of pure components. We also introduce a high accuracy model for water and inhibitors and water-oil emulsions to use in flow and production assurance simulations.

Version 7.1 includes also extensions to enhance and simplify engineering workflows, allowing automatic import and export to process simulation software (e.g. Hysys, UNISIM and Petro-SIM) and tuning of the Peng-Robinson EoS with Costald liquid density (standard in process simulation). For subsurface and reservoir engineering, Multiflash 7.1 includes the simulation of slim tube experiment, that completes the set of standard and EOR PVT experiments EOR and regression of EoS.

Summary of main themes

  • Model Real Fluids - With its unique range of accurate and consistent thermodynamic and physical properties models, Multiflash allows predicting with great accuracy, the phase behaviour and transport properties of complex and highly non-ideal fluid mixtures, exhibiting the coexistence of several liquid, solid and gas phases for applications in upstream oil and gas production and transport (reservoir fluids, oils, condensates, natural gases, CO2, steam, high water cuts, alcohols, glycols etc.), petrochemicals (polymer and co-polymer blends), chemicals (acids, refrigerants) etc.
  • Maximise Production - With its highly reliable and advanced models for gas hydrates and hydrates inhibition, wax, asphaltene, solid scales and mercury, Multiflash is the standard PVT and physical properties package in flow assurance. Multiflash allows modelling truly multi-phase systems, exhibiting the coexistence of several fluid and solid phases, providing an integrated and reliable solution for production optimisation and to forecast and handle potential flow assurance or equipment availability issues.
  • Optimise Work Processes - Already embedded in leading flow assurance, production and process engineering software tools and with its advanced connectivity, Multiflash allows drastic increases of the effectiveness and efficiency of the engineering process, eliminating potential sources or errors due to the use of inconsistent fluid properties throughout the various steps of design and project execution. Multiflash provides engineers with a fully integrated workflow to accurately evaluate the physical and transport properties of reservoir fluids, perform point checks to avoid potential issues, rapidly assess options and compare the effect of design strategies and engineering solutions.

Specific highlights for this release

  • Modelling and architectural
    • Twu variants of PR and RKS EoS (Fluid Phase Equilibria,Vol. 69, 1991, pp 33-50) with volume shift and fitting of vapor pressure
    • New high accuracy water model for flow assurance simulations
    • Pal and Rhodes emulsion viscosity model
    • DTU variant of the CPA (Cubic Plus Association) EoS
    • New Sutton model for surface tension
  • Accuracy improvements
    • Re-tuning of Hydrates and inhibition model's parameters to new experimental data
    • Re-tuning of Mercury model's parameters to new experimental data
  • PVT modelling
    • Simulation of the slim tube experiment
    • Tuning of PR (Peng-Robinson) EoS variant with Costald liquid density
    • Fluids weaving
    • Tuning of common pseudos waxy fluids
  • User experience and workflows
    • Import/Export to process simulation
    • Creation or reports from PVT experiments regression and calculation trails
    • Customization of plots and phase diagram
    • Extensions (CGR, WGR, OGR etc.) to Multistage flash tool
    • Extensions of the fluid library