July 31 (Reuters) - Australia's Origin Energy ( OGFGF )

posted a 6% sequential decline in fourth-quarter revenue from

its stake in the Australia Pacific LNG (APLNG) project on

Thursday, as lower underlying commodity prices weighed on

earnings.

The power producer reported revenue from the APLNG project -

a joint venture with U.S. oil and gas major ConocoPhillips ( COP )

and China's Sinopec - of A$547 million

($352.32 million) for the three months ended June, compared with

A$583 million in the third quarter.

($1 = 1.5526 Australian dollars)