Karoon Energy (ASX:KAR) lowered its aggregate production guidance for the year to between 7.2 million barrels of oil equivalent (MMboe) and 8.2 MMboe from a previous range of 8.1 to 9.2 MMboe, according to a Tuesday filing with the Australian bourse.

The downgrade is a result of operational issues at the company's Who Dat joint venture, which operates a namesake oil and gas field in the Gulf of Mexico, per the filing.

Following recent technical analyses, the operator of the joint venture informed the company that the reinstatement of production through the Who Dat E manifold will not occur this year and is now expected to take place in the second half of 2027.

A remediation plan is in the works to restore the deferred production, including the removal of a failed riser that is planned in the third quarter, the filing said.

It added that intervention programs at two wells in the Baúna project off the coast of Brazil have been impacted by mechanical issues and weather delays, but work is progressing, and both wells are expected to be online around mid-year.

Karoon Energy shares fell 8% in recent Tuesday trade.