Origin raised the bottom end of its forecast range for annual underlying earnings before interest, tax, depreciation and amortisation by 3% to AUS$2.45 billion, but kept the top end of the forecast at AUS$2.62 billion.
The AUS$1.03 billion impairment charge on its 37.5% stake in the APLNG project was not a big surprise in the wake of writedowns taken by rivals on their LNG projects last year.
APLNG, operated by ConocoPhillips, is one of three coal seam gas-to-LNG plants which opened over the past two years in the northeastern state of Queensland amid a sharp slump in global oil and gas prices.
Origin also flagged it would book a AUS$578 million charge against its Browse Basin assets, which it bought for US$600 million in 2014, as it does not see them being developed anytime soon to supply ConocoPhillips' Darwin LNG plant.
Origin also flagged a AUS$170 million charge against the exploration assets which it plans to spin off in an initial public offering this year, which had been expected to fetch around AUS$1 billion.
