Energy giant Chevron says its liquefied natural gas projects in the North West have provided more than $40 billion revenue to Australian companies.
An update from Chevron Australia said the Gorgon project had spent about $27 billion on local content and created 17,000 jobs, while Wheatstone had contributed $14 billion and 7000 jobs.
It said more than 600 local companies had so far helped build the projects.
They include WA private firm NTC Contracting, which has performed civil works at Wheatstone, near Onslow, employing more than 120 people.
"We are proud to be making such a significant commitment to Australian companies that have created 17,000 jobs and growing," Chevron Australia managing director Roy Krzywosinski said.
In the early days of building Gorgon and Wheatstone, Chevron was accused of shunning local content in favour of foreign providers.