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Rigorous dynamic and steady-state multiphase modeling for complex pipe networks

The Pipe workspace in the Symmetry platform allows pipe networks to be created with the same thermodynamic packages as VMGSim and provides consistent fluid characterization from upstream to downstream models.
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The Pipe workspace in the Symmetry platform provides for the rigorous modeling of multiphase pipe networks in both steady state and dynamics.

The model complexity may vary from a simple straight pipeline to highly looped networks. This workspace also allows users to run their analysis in steady state (e.g. field development planning, network debottlenecking, flow assurance analysis, etc.) as well as in transient conditions (liquid loading, pigging scheduling, slugging, etc.).

The Pipe workspace relies on state-of-the-art thermodynamics, which allows users to apply the same fluid characterization, physical properties and phase equilibria throughout the reservoir, gathering system, processing, refining, final products, and by-products. This provides a more consistent model and includes the ability to track all of the components from end-to-end.

Highlights

Workspace Tailored for Pipe Network Applications
  • Simple and complex pipe networks solved with a network solver
  • Dedicated Pipe ribbon and stencil
  • Line list utility for easy visualization, analysis and bulk editing of pipes
  • Model Audit utility to guide users when specifying a pipe network and to help troubleshoot simulations
  • Flow Path Viewer to view profiles for sets of connected pipes
  • Initialize dynamic models from steady state results
Flow Correlations
  • Generalized multiphase mechanistic models (Petalas, Oliemans, etc.)
  • Available superior mechanistic flow models such as OLGAS 2 and 3 phase
  • Traditional empirical methods (Beggs and Brill, Lockhart & Martinelli) 
Flow Assurance
  • Rigorous Hydrate formation estimation with or without inhibitors
  • Wax formation
  • Erosional Velocity
  • Solid formation
  • Component tracking
  • Extensive list of physical and transport properties
  • Access to a comprehensive set of productivity tools: case studies, custom calculations in process calculators, and flexible plotting of virtually any variable
Well Deliverability

Well performance can be modeled using the Deliverability option available in the Source and the Stream - it allows you to input a relationship between well flowing pressure and well production rate.

  • Tabular data (Q vs P)
  • Linear equations
  • Fetkovich equation
  • Vogel equation
Pipe Network Creation
  • Build a network using terrain details based on digital elevation models (e.g. DEM files)
  • Ability to import pipe networks from shapefiles
  • Resolve inconsistencies and connectivity issues using the network connection tool
Pigging
  • Insert pigs directly in the pipeline or through the pig launcher in the dynamic model
  • Track pig location and velocity throughout the gathering system/network
  • Predict liquid holdup and pressure loss as pig proceeds down the pipe and sweeps liquid ahead
  • Pig one or multiple pipes—there's no limit to the number of pipes in a network that can be pigged
  • Analyze different control mechanisms to mitigate large liquid slugs leaving the pipeline into the downstream slug catcher
  • Use the Scheduler block to develop a pigging schedule for pipelines at regular intervals
Slugging
  • Calculate liquid holdups and slugs induced by elevation/terrain changes in pipelines—important for configurations such as risers
  • Calculate slugging based on flowrate and operational conditions
  • Monitor the formation and burping of liquid slugs in pipelines
  • Evaluate slug catchers based on liquid slugs/holdup instead of steady state values
Fluid Characterization

The Symmetry platform contains a wide variety of fluid characterization methods for systems ranging from heavy oil to associated liquids produced with gas. Simulations may use a consistent slate of components regardless of the number of different fluids when using PIONA-based characterizations. These types of fluids track the molecular structure of the different sources, which allow for consistent property estimation when material is blended.

The data required to define a fluid may be as detailed as an extended Cn analysis combined with other information such as viscosity or density data. There are also options to characterize fluids with a reduced set of properties such as specific gravity, gas oil ratio and water cut. 

Property Package

The Symmetry platform has a consistent property package and fluid characterization that can be used throughout the simulator with both steady state and dynamic engines.

 
 
 
 
 

Contact Us

To find out how VMG can help you solve your process challenges, email or call in the U.S. and Canada at (403) 457-4595. For all other inquiries, please fill out the form below.

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