The company posted a profit of just US$26 million for 2015, well down on the more than US$2.4 billion profit booked the previous year.

Hitting the company's bottom line was US$1.1 billion in after tax one-off charges including asset impairments which were largely attributable to Woodside lowering its short and long-term oil price assumptions.

“Following the dramatic fall in oil prices during 2015, we took a decision after the close of the year to lower our short and long-term oil price assumptions,” Woodside chairman Michael Chaney said in the company's annual report on Wednesday.

“This