What is Eclipse Simulation

1. Basic
Concept
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2. Why
Reservoir
Simulatio
n
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3. What is Eclipse
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4. 4
Eclipse Introduction
• Title, problem dimensions, switches, phases present,
components etc.
• Required
1.RUNSPEC
• Specification of geometry of computational grid (location of grid block corners), and
of rock properties (porosity, absolute permeability, etc.) in each grid block.
• Required
2.GRID
• Modifications to calculated pore volumes, grid block centre depths and
transmissibilities.
• Optional
3.EDIT
• Tables of properties of reservoir rock and fluids as functions of fluid pressures, saturations and
compositions (density, viscosity, relative permeability, capillary pressure, etc.). Contains the
equation of state description in compositional runs.
• Required
4.PROPS
• Separate the field into several regions due to the PVT properties, Sat.
Prop. , Initial Conditions, Fluids in place, EOS regions
• Optional
5.REGIONS
• Specification of initial conditions in reservoir - may be:
• Calculated using specified fluid contact depths to give potential equilibrium
• Read from a restart file set up by an earlier run
• Specified by the user for every grid block
• Required
6.SOLUTION

5. 5
Eclipse Introduction
• Specification of data to be written to the Summary file after
each time-step. Necessary if certain types of graphical
output (for example water-cut as a function of time) are to be
generated after the run has finished. If this section is omitted
no Summary files are created.
• Optional.
7.SUMMARY
• Specifies the operations to be simulated (production and
injection controls and constraints) and the times at which
output reports are required. Vertical flow performance
curves and simulator tuning parameters may also be
specified in the SCHEDULE section.
• Required
8.SCHEDULE
• Specifies a reservoir optimization problem (objective
function, control parameters, constraints.
• Optional
9.OPTIMIZE

6. Important
Sections
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7. Static
Reservoir
Descriptio
n
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8. PVT and
Rock Data
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9. Initialization
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10. Well Data
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