Australia's liquefied natural gas sector is set to be swamped by a multibillion-dollar wave of disputes between producers and contractors over liability for cost blowouts and delays, as the slump in resources investment and commodity prices sharpens appetites to claw back funds. Chevron's overbudget $US54 billion Gorgon LNG venture, Santos' $US18.5 billion GLNG project, and Inpex Corporation's $US34 billion Ichthys project in Darwin are among those understood to be the subject of arguments over responsibility for contract variations that have had an impact on the entire supply chain.