- CASE STUDIES
- CHEMICALLY CONTAMINATED WELL
- Coil Tubing Recovery
- EPS Workover
- HPHT Underbalanced Drilling
- Live Well Sandscreen Installation
- Live Well SSSV Installation
- NUI Workover
- Offshore Live Well Fishing
- Onshore Re-Abandonment
- Rigless Abandonment
- Safeguarding a Blown Out Well
- Straddle Recovery
- Underbalanced Drilling
- WATER PRODUCTION SHUT OFF
Water Production Shut Off
Objective
This gas production well with 4-1/2" x 5-1/2" tubing was completed in 1996. The program's primary objective was to shut off water production zones and install a new completion. HWO was used to remove the straddle completion, isolate the Rotliegend formation, isolate the water zone in the Bunter formation and re-complete the well as a Bunter producer, with production only from the top part of this zone.Location
The well site is located in an environmentally-sensitive area that borders a UNESCO protected dune area and within close proximity to housing. The use of the HWO unit will have a major impact on how operations affect the local environment:
- Significant reduction in site preparation work compared to a drilling rig and no requirements to extend the concrete base
- Significant reduction in trucking operations to rig up and rig down the HWO unit compared to a normal drilling unit
- Reduced visibility of the HWO unit (no derrick structure)
- Lower noise level than a normal drilling unit
Planned Execution
- Work completed without incidents (no spills, no accidents)
- Successful abandonment of the Rotliegend formation
- Completion recovery and packer milling successfully carried out
- Compliments from nearby residents on minimal disturbance
- Well is producing twice the expected capacity (dry gas)
