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Oil & Gas Training
and Competency Development
Competency Management system SLB NEXT

ECLIPSE Compositional Simulation

When fluid sample consists of two or more hydrocarbons, and those hydrocarbons exhibit distinctly different phase and composition changes relative to temperature and pressure, more complex definitions of fluid behavior are required for reservoir simulation and predictions of recovery.

Compositional simulation is useful when an equation of state is required to describe reservoir fluid phase behavior. Some applications include the modeling of a miscible flood scheme and compositional changes associated with depth. Similarly, a compositional model is the right choice to accurately capture the complex physics such as condensate dropout in the reservoir. 

Knowledge of compositional behavior is also required for accurate planning and designing of surface production facilities.

Day 1

Introduction to PVT

  • Some basic PVT Concepts
  • Reservoir fluid types and behavior
  • Introduction to PVT Package
  • Introduction to Compositional simulation
  • Components and compositions
  • Black oil and compositional fluid models.

Fluid Modeling workflow

  • Samples representatively and quality checks
  • Laboratory tests and experiments
  • Splitting and grouping
Day 2

Compositional EoS and flash

  • Compositional Equations of State (EoS)
  • Compositional flash
  • The regression workflow

Miscibility Modeling

  • Ternary diagrams
  • Miscible and immiscible fluids
  • Composition variation with depth
  • The slim tube experiment
  • The slim tube simulation exercise
Day 3

From ECLIPSE Blackoil to ECLIPSE Compositional

  • Black oil and compositional models
  • The solution methods
  • The different sections in ECLIPSE
  • Relative Permeability interpolations
  • The Oil Full field Model Exercise
Day 4

Gas modeling in ECLIPSE Compositional

  • Gas flow around wells
  • CO2 modeling for gas storage
  • The Condensate full filed model Exercise
Day 5

Other important options in ECLIPSE Compositional

  • Diffusion of oil in gas
  • Tracers
  • Lumping and de-lumping
  • Components in water
  • The Condensate competition exercise
Learning activity mix

Reservoir engineers familiar with ECLIPSE Blackoil simulator who are interested in learning reservoir compositional simulation using ECLIPSE Compositional simulator

  • Understand blackoil and compositional model definitions, equations, assumptions, approximations, and unknowns
  • Learn pressure-volume-temperature (PVT) practices and phase behavior
  • Understand structure and keywords
  • Learn about miscible, immiscible, and water-alternating-gas (WAG) displacement of an oil and gas injection into condensates
  • Use PVT pressure-volume-temperature analysis software and ECLIPSE Compositional to model slim tube displacements
  • Learn about first contact miscibility and multi contact miscibility.
  • Understand condensing gas drive and vaporizing gas drive
  • Learn about solution scheme
  • Perform flash calculation
  • Understand equations of state (EOS)
  • Perform characterization and component lumping
  • Learn about surface tension effects
  • Learn about near-critical oil and gas relative permeability
  • Gas-water modeling and CO2 water solubility
  • Tracer tracking of compositional components
  • Conduct full field simulation exercises

Pressure-Volume-Temperature (PVTi) or knowledge of Equation of State (EOS) modeling; reservoir engineering background or familiarity with the ECLIPSE Blackoil simulator

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