Origin Energy Limited (ASX:ORG) says the cost to upgrade its BassGass project has risen to $460 million from $360 million.
Origin says the increase in costs has been caused by construction challenges associated with working on the remote Yolla platform.
The energy company owns and operates 42.5 per cent of BassGas with AWE Limited (ASX:AWE) controlling 46.25 per cent and Toyota Tsusho 11.25 per cent.
Origin reported a net profit of $823 million in the last six months of 2011.
