Cenovus Energy responded to inquiries at a recent open house regarding the well release at its Rush Lake Thermal facility.
The company said it has utilized “heavy brine fluids, barite and cement” to attempt to seal the leaking well. This new information comes after the Meridian Source sent multiple questions after the event, held in Paynton.
Read more: Complete Rush Lake coverage
The company also stated it’s “killed” 15 of the site’s 16 wells in an attempt to “put the site to bed” when containment is complete, which can be done using various methods.
One permanent method to kill a well involves using cement to permanently plug the wellhead. Other, more temporarily methods, would allow a restart and include using a mechanical plug.
Cenovus has not clarified which method was used.
On the investigation
They did, however, indicate they will be leading the investigation into the cause of the ongoing leak.
“Once the incident is resolved, we will conduct a thorough investigation into the cause and, if need be, include third-party investigators and provide a report to the regulator,” stated Cenovus media relations in an email, noting there was no indication of issues prior to May 7.
“Our focus right now is bringing the well under control, and we continue to work diligently on a resolution,” said the company, adding the depth of the issue also remains unknown.
Safety procedures were also addressed through email correspondence.
“Our integrity programs are overseen by company and third-party experts to ensure regulatory compliance and safe and reliable operations. We concentrate on risk identification and assessment and mitigation.”
The Source also asked about possible issues at the Edam East site, located approximately 20 kilometres east of the Rush Lake facility.
“The rest of our Saskatchewan thermal facilities continue to operate safely,” stated Cenovus.
Read more: Understanding the Cenovus Energy Hub
