Decommissioning
Well, pipeline and facility sites designated as orphans move into the OWA’s inventory. Using a risk-based approach, we inspect and prioritize sites, then safely and permanently decommission, or dismantle, all sites.
Risk-based approach
We use a risk-based approach to maintain the safety and protection of workers, the public and the environment.
Through a rigorous intake process, we identify stakeholders affected by orphan sites and notify them of future work on their land. Next, sites are evaluated and grouped into low-, medium- and high-risk.
Inspections
Sites are then inspected to mitigate risks and obtain site-specific information for the decommissioning and reclamation processes. Inspectors identify onsite hazards and any environmental issues, as well as identifying equipment for removal and potential sale. This information is vital to maximizing the efficiency of our subsequent field operations.
Decommissioning
Wells, pipelines and facilities are permanently decommissioned, or dismantled, and left in a safe condition so there are no risks to the public or environment. A well is considered decommissioned (also known as abandoned) when the AER’s requirements in Directive 020: Well Abandonment are satisfied. Wells are plugged, cut and capped at least one metre below the surface and a vented cap is placed on top of the well casing. Equipment is removed, and pipelines are purged and decommissioned.
The pace of decommissioning spiked in 2020-21 due to government loans, which are now completely spent and being repaid. Decommissioning has returned to more typical levels, with the OWA continuing to actively address its inventory.
Read our annual report for more detailed information about our performance decommissioning wells.
Who closes a defunct site?
