1. A correctly designed test should: (select three)
a. Minimize test duration
b. Be long enough to reach radial flow
c. Have a duration exceeding the WBS effect
d. Always be long enough to reach any suspected boundaries
e. Include a multi-rate sequence

2. Before starting any analysis it is essential to: (select two)
a. QAQC pressure gauge data
b. Obtain the formation permeability
c. Ensure the rate history and the pressure data are synchronized

3. The governing conditions for the diffusivity equation are: (select three)
a. The fluid is highly compressible
b. The fluid is slightly compressible
c. The formation is isotropic and homogeneous
d. The PVT parameters are constant
e. The fluid is an hydrocarbon
f. The vertical permeability is equal to the horizontal permeability

4. The parameters influencing the permeability calculation are: (Select two)
a. The porosity
b. The net pay thickness
c. The PVT parameters
d. Well damage

5. In the Darcy’s Law equation Delta p = q.B.µ/A.k . The variables are: (check the corresponding cell)

	Viscosity	Pressure drop	Area of flow	Permeability	Rate	Volume factor
Delta p
q
B
µ
A
k

6. The skin factor can influenced by: (select three)
a. The original formation permeability
b. Mud invasion
c. The perforations
d. The completion
e. The fluid

7. A back pressure test, or flow after-flow test, is: (select two)
a. A multiple rate test
b. A test with equal duration production periods separated by shut in.
c. A test with a sequence of consecutive production periods

8. An isochronal test is: (select two)
a. A multiple rate test
b. A test with equal duration production periods separated by shut in.
c. A test with a sequence of consecutive production periods

9. A modified isochronal test is: (select one)
a. Where the build-up period durations are equal to the production period durations
b. Where the build-up continues until the time of pressure stabilization

10. The objectives of a Well Test can be: (select four)
a. To evaluate formation permeability
b. To evaluate well damage
c. To evaluate the hydrocarbon reserves
d. To evaluate the static reservoir pressure
e. To evaluate the formation porosity
f. To evaluate the oil saturation

11. The objectives Gas transient test analysis can be to evaluate: (select four)
a. formation permeability
b. the rate dependant skin
c. the AOF
d. gas PVT parameters
e. gas reserves
f. gas saturation

12. Characteristics of constant wellbore storage effect include: (select two)
a. P is a linear function of time
b. Unit slope straight line on the log-log plot
c. P is a linear function of log (time)

13. Wellbore Storage in a gas well is: (select four)
a. Always constant
b. Dependant on the well volume upstream of the shut in valve
c. Dependant on well fluid compressibility
d. Dependant on the shut in well pressure
e. Dependant on the production rate
f. Reduced by using a downhole shut in tool

14. Based on the following skin values, what is your diagnosis?

Skin value	Fractured well	Acidized well	Damaged well
-5
+2
+10
-2

15. Which two are the most suitable diagnostic for analysis of a build-up after multiple rate flow periods? (select two)
a. Semilog MDH plot
b. Cartesian plot
c. Horner plot
d. Superposition
e. Log-log pressure and derivative plot

16. What are the characteristics of Infinite Acting Radial Flow in a drawdown: (select two)
a. The fluid flow lines in the formation are parallel
b. P is a linear function of log(delta T)
c. P is a linear function of log(tp+ delta t / delta t)
d. A horizontal line on the log-log derivative

17. What is the characteristic of Infinite Acting Radial Flow in a build-up: (select one)
a. P is a linear function of log(time)
b. P is a linear function of log(tp+ delta t / delta t)
c. We see a unit slope straight line on the log-log derivative

18. What are the characteristics of linear flow (select two)
a. P is a linear function of time
b. P is a linear function of the square root of the time
c. a ½ unit straight line on the log-log derivative

19. A Horner analysis is strictly valid (select one)
a. During the first drawdown period
b. On the first build-up after a drawdown period
c. At the build-up after any number of rates

20. From the Horner plot straight line drawn through IARF it is possible to extract the: (select three)
a. kh
b. S
c. P*
d. C

21. What is the effect of a single sealing fault: (select two)
a. A unit slope straight line on the log-log derivative
b. The semilog straight line slope doubles
c. The log derivative stabilizes at twice the IARF stabilization
d. The derivative curves down

22. The AOF is the: (select one)
a. Minimum gas rate of the tested well
b. Extent of the drainage area
c. Maximum theoretical gas rate with Pwf = Patm
d. Gas well productivity index

23. In a fractured well which of the following flow regimes can be observed? (select four)
a. linear flow
b. WBS effect
c. bilinear flow
d. spherical flow
e. IARF

24. In a horizontal well the first derivative stabilization corresponds to: (select one)
a. linear flow
b. wellbore storage
c. pseudo-radial flow around the horizontal drain

25. On the following log-log plot identify the lines:

Line one	WBS		IARF		Sealing fault		Pseudo-steady state
Line two	WBS		IARF		Sealing fault		Pseudo-steady state
Line three	WBS		IARF		Sealing fault		Pseudo-steady state