The Australian major reported a net profit after tax of US$812 million (A$776.5 million), slightly down from $828 million for the first six months of 2011.

However, a 4.5% rise in underlying profit was underpinned by a 17.8% rise in operating revenue and a 7.2% increase in output.

Woodside said these results were helped by the successful start-up of Pluto, stronger commodity prices and higher contributions from Vincent and North West Shelf oil.

The