Downhole · Well Testing
Test Packer
A temporary packer in the test string that isolates the zone being tested.
What it does
Isolates the zone of interest so reservoir fluids flow into the string, and keeps the produced fluids in the string rather than in the annulus. It is removed when the test ends.
Basics
| Type | Temporary, surface actuated |
| Isolates | Zone of interest |
| Keeps fluids | Inside the string |
Common failures
- Packer that does not seal, so annulus fluid enters the test
Troubleshooting
- Symptom
- Annulus fluid recovered in the string
- Likely cause
- Packer not holding
- What to check
- Reset the packer and repeat the flow period