Prepare to be surprised, Woodside is very much a Canadaian run global project.
I disagree, there's a very simple reasons why Australian contracts will be manned by Australian citizens - they can! Government rules and union agreements will tie the hands of any company who thinks they can bid low on the basis of cheaper overseas labour.
Only if demand outstrips supply can a company then apply for work permits.
This ain't unique to Oz either, it's the same the world over. There are no touring GO pilots in Europe, there are no CHC Scotia pilots in Norway, there will be no CHC GO pilots in Australia unless there's not enough qualified and experienced Aussie pilots to man the aircraft.
CHC GO exists because they operate in countries that don't already have sufficient pilots/engineers/managers to run an operation.
It's not a bad time to be an offshore pilot in Oz, things are looking up