Aug 12 (Reuters) - Origin Energy Ltd ORG.AX :
* Org provides update on carrying value of upstream assets ORG.AX
* Expects to recognise an additional non- cash post-tax impairment charge of approximately $337 million in its 2015 full year
* Impairment charge outlined is in addition to the $53 million impairment charge of New Zealand onshore assets
* Says there is no impairment related to Australia pacific lng
* Says "economics of origin's investment in Australia pacific lng remain robust"
* Source text for Eikon ID:nASXhXC3L