Downhole · Abandonment
Cement Retainer & Squeeze
A drillable packer set above the perforations through which cement is pumped and squeezed into the perforations and the formation.
What it does
Seals the producing zone itself, not only the casing above it. The retainer is pressure tested and the cement is squeezed until the final pressure reaches the required margin above reservoir pressure.
Basics
| Set | Within 15 m above the perforations (Alberta) |
| Retainer test | 7,000 kPa differential for 10 minutes |
| Volume | Casing volume to the bottom perforation plus 0.5 m3 |
| Final squeeze | At least 7,000 kPa above reservoir pressure |
Common failures
- Final squeeze pressure not reached
Troubleshooting
- Symptom
- Pressure does not build during the squeeze
- Likely cause
- Zone still taking cement
- What to check
- Repeat the squeeze until the required final pressure is reached