Chevron's Gorgon and Wheatstone projects account for more than 5% of global LNG capacity, and news of the possible strikes sent European natural gas prices surging.
"It's set to cost Chevron their LNG exports as (the industrial action) starts to bite," said the alliance that groups together the Maritime Union of Australia and the Australian Workers' Union.
The unions last week warned that work stoppages could cost Chevron billions of dollars.
"Ten hour work stoppages: it is a harsher initial industrial action than what the unions contemplated for Woodside," he said.
Last week, Offshore Alliance and Woodside (WDS.AX) resolved worker disputes at North West Shelf, Australia's largest LNG facility, after negotiating higher wages, job security and employee-friendly rosters, averting industrial action.
Persons:
Gaby Oraa, Wheatstone, Saul Kavonic, Renju Jose, Lewis Jackson, Florence Tan, Alasdair Pal, Chris Reese, Shri Navaratnam, Tom Hogue
Organizations:
Chevron, U.S, REUTERS, SYDNEY, Workers, Reuters, Offshore Alliance, Maritime Union of Australia, Australian Workers ' Union, Shell, Energy, Woodside, North West Shelf, Thomson
Locations:
Venezuela, Caracas, SINGAPORE, Australia, Woodside, WDS.AX, Asia, Chevron, Sydney, Singapore