Fully integrated reservoir/multi-phase gathering system simulator, built to allow you to quickly optimize your total field, no matter what the size. 

In one stand-alone model, it is possible to simulate complex gathering systems (including items such as flow splitting and line looping) with or without liquids, vertical/horizontal wells, 3D gridded reservoirs and/or simple tanks.    


Fully integrated gas reservoir/multi-phase gathering system simulator

VMGField (formerly Gasmod) is capable of modelling large and small gas properties. The simulation of complex pipeline systems (with or without liquids), vertical/horizontal wells, 3D reservoirs, and simple tanks are all possible in one stand-alone model. Additional capabilities include flow splitting, line looping, parallel/series compression, multiple delivery points, and injection/withdrawal scenarios. The drag-and-drop pipeline design feature and on-screen UTM coordinate system allow the user to build surface network systems quickly and accurately.

A very fast and computationally efficient simulator

It accurately predicts results from infill drilling (including back-out of existing production), compressor modifications, and debottlenecking. VMGField also assists with reserves determination, competitive drainage situations, and becomes a good database of information for a gas property. It is also a useful gas marketing tool for day to day storage commitments.

More than 20 years of successful usage

VMGField has been used to model the low permeability fields of NE British Columbia/NW Alberta, and the shallow gas fields of SE Alberta/SW Saskatchewan. It is also widely used for evaluating and optimizing new and existing gas storage projects. VMGField has been utilized on coal bed methane and shale gas type properties.

  • Quickly build fully integrated gridded 3D reservoir, complex gathering system, and facility models in one package
  • Predict nodal pressures, temperatures, fluid compositions and water born species concentrations in the network
  • User friendly input/output interface
  • Computationally very efficient – built for large fields with high well counts
  • More than 20 years of successful usage
  • Currently features VMGThermo, Pipeline Integrity Management System (PIMS), hydrate calculations, and many more developments planned 



Reservoir Model
  • Dry gas (pseudo pressure formulation)
  • Gridded or tank reservoirs (1D, 2D, or 3D)
  • Fully defined reservoir properties
  • Multi-layer/multi-zone
  • Multiple completions
  • Dual porosity capability
  • Links to multi-phase simulator GCOMP for modelling of gas-water, coal bed methane, retrograde gas condensate, and oil reservoirs.  
Wellbore Model
  • Multi-phase flow 
  • Commingling, turbulent inflow
  • Fully defined configurations
  • Vertical/horizontal wells
  • Gas lift
Gathering System Model
  • Multi-phase, multi-component pipeline flow
  • Multiple delivery points
  • Compression (parallel and booster configurations)
  • Chokes, valves, regulators, separators, line heaters, in-line separators with products remaining in network
  • Corrosion based pipeline risk of failure assessment
  • Energy balance for flowing temperature calculation
  • Hydrate calculation
Shallow Gas
  • VMGField has been widely used to model the SE Alberta and SW Saskatchewan shallow gas fields
  • Milk River, Medicine Hat, and Second White Specks formations
  • Gridded reservoir models with vertical communication
  • Vertical wells with multi-zone completions
  • Commingled production
  • Up to 8,000 wells in one model
  • Complex gathering systems operating at very low suction pressures
Tight Gas
  • VMGField has been used to model the low permeability gas fields in NE British Columbia and NW Alberta
  • Low permeability reservoirs with natural sweet spots
  • Gridded reservoir models
  • Multi-lateral horizontal wells
  • Pad drilling
  • Type curve matching
  • Complex gathering systems
  • Multi-phase wellbore and pipeline
Shale Gas
  • VMGField has been used to model shale gas fields in NE British Columbia
  • Very low permeability reservoir with multi-stage fractures
  • Gridded reservoir models
  • Vertical / horizontal wells
  • Pad drilling
  • Type curve matching
  • Multi-phase wellbore and pipeline
  • Drill-to-fill
Coal Bed Methane
  • VMGField has been used to model coal bed methane
  • Gridded reservoir model linked with Gcomp multi-phase simulator
  • Gas-water and dual porosity reservoir system
  • Langmuir isotherm tables
  • Relative permeability curves
  • Multi-lateral wells
  • Multi-phase wellbore and pipeline
Gas Storage Modelling
  • Widely used for evaluating new projects and optimizing existing major projects in Western Canada
  • Injection and withdrawal scenarios
  • Gas marketing tool for day to day storage commitments
User Friendly Graphical Interface
  • Large interactive network system display
  • Create as-built network systems
  • Point and click/drag and drop network system creation
  • On screen well and network system component additions
  • Time saving input features
  • Time stepping (input and output)
  • Wizard tool to guide user through reservoir and network model design phase
  • Pipeline color coding
  • UTM coordinate system 
Easily Modify Changes to an Exploitation Plan
  • Add and connect infill wells
  • Re-direct and loop pipelines
  • Insert/modify compression
  • Calculate pipeline lengths on the screen
  • Automatically calculate inflow coefficients


Easily Develop a Gridded Reservoir System
  • Reservoir properties defined with spreadsheet arrays
  • Cut, paste, and scale properties
  • View well locations and transmissibility restrictions on spreadsheet arrays


Results Analysis
  • Easy to objectively quantify the benefits of changes to the exploitation plan such as infill drilling, addition of compression (field or plant) and de-bottlenecking of the gathering system
  • Compare results (graphically or tabular) on a well, group, and segment basis (i.e. pipe, compressor)
  • View results directly on the network system display at any point in time
  • Export performance data in Excel® compatible format for further analysis and post processing (i.e. economic analysis)
  • Export reservoir results such as grid block pressure and gas-in-place for further analysis and post processing to third party software including Petrel®


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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