Electric line · Intervention
Perforating Gun
A carrier loaded with shaped charges that is fired downhole to shoot holes through casing and cement into the rock.
What it does
Opens new zones or reperforates old ones during intervention. On electric line the gun is placed on depth by correlation and fired from surface; it can also run on tubing or coiled tubing.
Basics
| Charges | Shaped charges in a hollow carrier |
| Conveyed by | Electric line, tubing or coiled tubing |
| Fired | From surface after depth correlation |
Common failures
- Gun fired off depth, missing the target interval
Troubleshooting
- Symptom
- Well does not respond after perforating
- Likely cause
- Wrong depth or charges did not fire
- What to check
- Check the correlation log and the shot detection, inspect the gun at surface