The impairments are a result of recent reserve revisions, revised development plans and lower oil prices, according to the company.
Origin will book a post-tax impairment of A$180 million against its Cooper basin assets, while in the Bass basin and Otway basin it expects to book A$122 million and A$35 million in impairments, respectively.
The impairments are in addition to the A$53 million charge Origin booked against its New Zealand onshore assets in its half-year results.
The
