Chevron's Gorgon LNG project on Barrow Island began operating in 2016 has the world's largest carbon capture and storage system dedicated to emissions reduction.
Welders will have to grind out and redo repairs at Gorgon performed to an incorrect procedure provided by Chevron and the delay could cost up to $250M.
Chevron's problems at Gorgon LNG from faulty welds years ago in a South Korean factory continue with delays to repairing the first of three trains to be fixed.
After action by safety regulators Chevron will progressively shut down all LNG trains at Gorgon to fix faulty welds in propane-filled pressure vessels.
Chevron's ambitious injection of Gorgon CO2 shaped the $US54B LNG project and a year after starting up 2.5 years late its long-term performance remains to be proved.
Chevron faces shutting Gorgon LNG down to make it safe after WA safety regulators responded to reports of thousands of cracks in propane-filled vessels.
Chevron has "put additional mitigations in place" to protect workers while it mulls what to do with two giant LNG trains operating at Gorgon that could have defective welds.
Chevron intends to have cracked propane vessels fixed and Gorgon LNG back in full production by September as it awaits inspection by the safety regulator.
The safety and economic stakes for Gorgon LNG are high as WA Government inspectors soon head to Barrow Island to check on Chevron's cracked pressure vessels.
Safety regulators knew nothing of cracked pressure vessels at Chevron's Gorgon LNG plant until alerted by media reports and now plan to inspect the equipment themselves.
Thousands of cracks raise questions about the safety of the Gorgon LNG plant and operator Chevron will decide to shutdown or maintain revenue, with the safety regulator on the sidelines.
Chevron has been denied a two-year free pass on Gorgon greenhouse gas emissions by the WA Government that could cost it more than $80 million, and there may be a future bill for Wheatstone as well.
Chevron boss Mike Wirth is not distracted by renewables as he pushes for more and lower cost production and looks to move gas through Woodside's Scarborough project.
