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WorksheetsGas Well Test Analysis
Total questions: 10
Worksheet time: 6mins
The objectives of well testing analysis are, EXCEPT …
Determine rock permeability
Determine rock porosity
Determine Formation damage (Skin)
Reservoir Boundary (re)
Initial reservoir pressure (Pi)
The diffusivity equation was generated from the Law of Conservation of Mass, the Darcy flow, and…
Equation of art
Equation of state
Equation of fluid flow
Equation of equilibrium
Equation of diffusivity
In pressure build-up test, we use the Horner Plot as a plot of …
Pws versus time
Pwf versus time
Pws versus (t + Dt)/t
Pws versus (t + Dt)/Dt
Pwh versus time
In pressure transient test, the permeability can be calculated from the slope of the graph by knowing the following parameters, EXCEPT….
Formation thickness
Production rate
Fluid Viscosity
Formation Volume Factor
Initial pressure
Following statement are basic assumption of diffusivity equation, EXCEPT….
Homogeneous and isotropic reservoir
Uniform thickness
Pressure gradient is small
Laminar flow (Darcy Flow)
Fluid and rock properties are not constant
Boyle’s law states that …
P/T is constant
PV is constant
PT is constant
P/V is constant
V/T is constant
At the diffusivity equation, a parameter that does not exist is …
Pressure
Viscosity
Radius
Flowrate
Porosity
In pressure test analysis, the dimensionless variables consist of …
Pressure, viscosity, permeability
Pressure, permeability, porosity
Pressure, flowrate, time
Pressure, time, radius
Pressure, flowrate, radius
“An infinite acting reservoir” assumes that …
P = Pi @ time = 0, for all radius
P = Pi @ all time, for radius = 0
P = Pi @ time = 0, for radius = 0
P = Pwf @ time = 0, for all radius
P = Pwf @ all time, for all radius
In pressure draw-down test, the permeability can be calculated from slope of the graph Pwf versus time in …
Log Pwf versus Log t
Pwf versus Log t
Pwf versus t
Pwf versus (t+DT)/Dt
Pwf versus Log (t+Dt)/Dt
