US oil and gas supermajor Chevron is the major LNG producer in WA with its Gorgon and Wheatstone LNG projects and a share in the North West Shelf project.
Al Williams will leave Australia to manage Chevron's global reputation after handling numerous crises in his three years in charge of the Gorgon and Wheatstone LNG projects.
Gorgon LNG has emitted 7 million tonnes of climate-warming CO2 more than permitted but Chevron is unlikely to suffer at the hands of lax Australian governments.
Chevron, Santos and Kerry Stokes' BCI Minerals are battling in court over responsibility for gas pipelines supplying 40 per cent of the WA market that traverse the $780 million Mardie salt project.
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.
Chevron's slice of the North West Shelf LNG project is touted as ideal for infrastructure investors. It is the opposite - highly risky, complex and dysfunctional.
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.
