# Well Control: Principles and Procedures - Leak Off Test and MAASP -

1. When drilling into new formation, the formation pressure increases. To maintain a reasonable overbalance on bottom, the drilling fluid density is increased. How will this affect the MAASP?

a. The MAASP will decrease.
b. The MAASP will increase.
c. The MAASP will stay the same.

2. When should MAASP be recalculated?

a- After changing the mud density
b- After each drilling bit change
c- At the beginning of each shift
d- Immediately before entering a pay zone.

3. Which critical pressure is calculated using the results of the Leak-Off Test (LOT)?

a- Dynamic Casing Pressure
b- Final Circulating Pressure (FCP)
c- Initial Circulating Pressure (ICP)
d- Maximum Allowable Surface Pressure (MAASP)

4. Which parameter would affect the Leak-off Test (LOT) pressure?

a- The fluid pump circulating rate for the next drilling operation
b- The hydrostatic pressure at the casing shoe
c- The pressure limit for the fluid pump
d- The volume of the fluid in the annulus from the casing shoe to surface

5. Which of the following need to be known for a leak-off test to be correct? (TWO ANSWERS)

a. The mud density in the well.
b. The volume of mud in the annulus from casing shoe to surface.
c. Slow circulating rate.
d. The pressure limit for the mud pump.
e. Mud hydrostatic pressure in the casing annulus.(TVD)

6. What is one condition that must be achieved to complete a successful Leak-Off (LOT)?

a- The casing pressure test value will equal to the LOT value
b- The hole must be drilled to Total Depth (TD)
c- The Initial Circulating Pressure (ICP) must be used
d- The drilling fluid must be conditioned

7.Which information do you need for an accurate Leak Off Test (LOT). Choose two answers.

a. The fluid density in the well.
b. The fluid pump circulating rate for the next drilling operation.
c. The pressure limit for the fluid pump
d. The True Vertical Depth (TVD) of the casing shoe.
e. The volume of fluid in the annulus from casing shoe to surface

8.When performing a Leak-Off Test (LOT), which parameter must be accurately measured and recorded?

a. Fluid volume in open hole, density of the fluid used, and the True Vertical Depth.
b. Fluid volume in the casing, and Measured Depth (MD).
c. Pumping time until the leak-off, and the Measured Depth (MD).
d. Fluid volume pumped, density of the fluid used, and True Vertical Depth.

1. A                           4. B                         7. A-D
2. A                           5. A-E                      8. D
3. D                          6.

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