OMV said it expects to book around €1.6billion in write-downs in its upstream business on top of €300million charge in its downstream business.
The company said it brings its write-downs and charges since then to around €2.8billion.
OMV said it also now expects Brent crude to average at around $40 per barrel in 2016, down from $55 forecast three months ago.
It expects $55 per barrel next year, $65 in 2018, $70 in 2019 and $75 from 2020 onwards, it said.