Cement plug is required when it is necessary to:
- isolate productive intervals from water bearing zones,
- set cement plug in the casing,
- isolate perforated interval when shifting well to other horizons,
- create a concrete barrier at the near wellbore zone for reliable isolation,
- remediate defects in the production casing,
- isolate productive horizons when sidetracking,
- strengthen the near wellbore zone.