Reservoir Simulation MCQs

Which equation is the fundamental flow law used in reservoir simulation?

• Bernoulli’s equation

• Darcy’s law

• Navier–Stokes equation

• Fick’s law

In Darcy’s law, permeability has units of:

• Pa·s

• m²/s

• Darcy or milliDarcy

• kg/m³

The “black oil” model in reservoir simulation assumes:

• Constant composition of all phases

• No gas phase exists

• Three pseudo-components: oil, gas, water

• Thermal effects dominate

What does IMPES stand for in reservoir simulation?

• Implicit Pressure Explicit Saturation

• Implicit Porosity Explicit Stress

• Instant Pressure Equilibrium Solution

• Incompressible Phase Energy Solver

In a typical finite-difference simulation grid, a “cell” represents:

• A wellbore segment

• A discrete volume of rock/fluid

• The whole reservoir

• Only the aquifer

Upstream weighting in finite-difference discretization is used to:

• Improve time accuracy

• Guarantee numerical stability for convective terms

• Enforce boundary conditions

• Model capillary pressure

The primary purpose of history matching is to:

• Generate PVT correlations

• Calibrate model parameters to match production data

• Optimize well placement

• Calculate Darcy flux

Relative permeability functions describe:

• Absolute permeability of each rock type

• Effective permeability for each phase as a function of saturation

• Pore size distribution

• Capillary pressure vs. depth

A “fully implicit” scheme solves:

• Pressure explicitly, saturation implicitly

• Both pressure and saturation simultaneously at each time step

• Only the continuity equation implicitly

• None of the above

Which boundary condition represents no flow across a boundary?

• Constant pressure

• No-flow (sealed)

• Constant rate

• Constant saturation