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Whitebark Energy’s Rex-1 well awaiting production restart after workover

Production at the well will re-start once upgraded surface facilities at Wizard Lake are commissioned.

Whitebark Energy Ltd - Whitebark Energy’s Rex-1 well awaiting production restart after workover
The Rex-1 well at Wizard Lake oil field during drilling in 2018

Whitebark Energy Ltd (ASX:WBE) has completed a re-work of Rex-1 at Wizard Lake oil project in Canada and the well is ready to resume production once the upgraded surface facilities are commissioned.

Rex-1 was shut in when Rex-2 was brought online as the better than expected production from Rex-2 exceeded the capacity of surface facilities.

Well intervention

While Rex-1 well was shut in, Whitebark decided to undertake a well intervention to gather information that may explain the significant difference in performance between Rex-1 and 2.

During this work, the tool encountered metal debris in the hole which has now been recovered and cleared.

This debris has been identified as the drill bit and downhole motor of the coil tubing, which was stuck in the hole just prior to Christmas 2018.

At the time, the operator pushed this 5-metre-long debris to the toe of the well so that it would not interfere with production.

The obstruction in Rex-1 well.

“Lot more to see” from Rex-1

Managing director David Messina said, “We were very surprised to find an obstruction in the well, particularly after the procedures taken to clear the debris when it was drilled.

“It is highly unusual for debris to be dragged back up, but pleasingly it does indicate that we have a lot more to see from Rex-1.”

Debris was encountered at around 1860 metres MD, which is about one-third of the way into the horizontal lateral of the well.

The reason the debris moved uphole is unclear, but it was most likely dragged up the hole during the original recovery operation.

This significant obstruction in the hole suggests Rex-1 may have only been producing from the one-third of the wellbore that was not obstructed.

Messina said, “The team in Calgary did a fantastic job retrieving the abandoned pump in one trip and we are clearly looking forward to starting the well up again in December.”

Wizard Lake Development in Alberta, Canada.

The well has been prepared for the installation of a long-term pump and is ready to recommence production once the surface facilities upgrade has been completed in December.

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