Senex posted a loss of A$80.6 million (US$58 million) for the recent financial year, which ended 30 June, dropping from a profit of A$37.9 million a year ago.

Dragging the company into the red was a A$97 million pre-tax impairment which was mainly recognised against its non-producing assets in Australia's Cooper basin in response to the sharp decline in oil prices over the past year.

Senex