Unionised workers on two of Woodside Petroleum's floating production, storage and offloading vessels offshore Western Australia have today begun a four-week period of work stoppages.

The Offshore Alliance - which represents offshore construction, maintenance, catering and rig workers affiliated to the AWU and MUA unions - said in a social media post that crew on the FPSOs Okha and Ngujima-Yin would start a four-week protected stoppage action today.

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Offshore Alliance said the crew are contracted to a company called Legeneering, which was awarded a five-year contract in 2017 for all maintenance works on Woodside’s FPSOs.

"Offshore Alliance members working for Legeneering on the Woodside FPSOs are pushing back against Woodside's cut to pay and conditions dating back to 2017, and want EBA outcomes which align with industry standards," said the Offshore Alliance.

"Legeneering are a mile off the pace on rates of pay, allowances and a couple of key remuneration related conditions. We will have ongoing rolling stoppages on the Okha and Ngujima-Yin every day until our EBA claims are sorted."

A spokesperson for Woodside said any operational impact would be managed and there was no anticipated impact on production.

"Woodside is aware that some of our maintenance contractors are involved in enterprise bargaining negotiations with some of their employees who work on Woodside facilities. These negotiations are strictly between the contracting companies, their relevant employees and their bargaining representatives," said the Woodside spokesperson.

FPSO Ngujima-Yin: operates at the Vincent and Greater Enfield fields Photo: KEPPEL CORP

The FPSO Okha produces oil from the Cossack, Wanaea, Lambert and Hermes fields owned by the North West SHelf Venture.

The floater produced 376,802 barrels of oil, or about 4200 barrels per day, in the three months ended 31 March 2021.

The FPSO Ngujima-Yin produces oil from the Vincent and Greater Enfield oilfields and produced 1.7 million barrels of oil, or 18,900 bpd, in the three months ended 31 March 2021.