Abandonment D 020

Question 1

D 020

• 1) objective of well abandonment is?
• 2) Which abandonment operations require AER approval prior to work beginning -Non routine
• 3) minimum length of the cement plug that is added on top of a previously abandoned zone? 30 vertical meters

Answer 1

• Cover all non-saline groundwater (TDS <4000 mg/L) &
• to isolate or cover all porous zones

Question 2

4) IF an abandoned will is leaking who must be notified and what agreement must be in place?

• Notify mineral rights owner
• Have an active …

Answer 2

• Notify mineral rights owner
• Have an active surface lease agreement

Question 3

5) Open-hole abandonment for wells not in the oil sands area, fillers and/or additives can be used in the cement plugs as long as the compressive strength is a minimum of _____________kPa after curing 48 hours.

Answer 3

• 3500 kPa

Question 4

6) What is TVD?

• True Vertical Depth

7) What must occur in a cased-hole abandonment?

The licensee must…

Answer 4

abandon each completed pool separately and cover all non-saline groundwater with cement

Question 5

8) Where can inhibitor fluid not be used?
* Must not be used inside the casing ove*r

Answer 5

intervals that are above the BGWP

Question 6

9) For wells without liners, what pressure must the casing string be tested at?

For how long?

Answer 6

Stabilized pressure of 7000kPa

for 10 minutes

Question 7

10) What is a GM problem? When testing shows the

presence of gas migration

11) What is surface abandonment?

Answer 7

The cutting off of casing strings and capping of a well

Question 8

12) Surface abandonment must be completed how soon after downhole abandonment?

-One year

13) Before any planned surface abandonment begins, what do you do with affected parties?

Answer 8

Must inform all affected parties (landowner and/or occupant)

Question 9

14) When is the casing string cut off? 1M? 2M?

Are these minimum or maximum depths and in relation to what?

• 1M is typical
• 2M for…
• minimum depths
• final contour elevation

Answer 9

special farming practices

Question 10

Build the skeleton TAG for an abandoned pipeline. List all the criteria on it.

1. T
2. L
3. L
4. Oe
5. Doa
6. Amliop

Answer 10

1. Tag#
2. Licensee:
3. Line #:
4. Other endpoints:
5. Date of abandonment:
6. Abandonment media left inside of pipe:

Question 11

18) What must occur prior to the beginning of any surface abandonment operation?

• Test and inspect to ensure no wellbore problem
• Typical tests include:

-

-

-

Answer 11

Surface Casing vent flow tests

Gas Migration tests

Fluid Level Tests