Keppel Corp's latest quarterly earnings soared 32.1 per cent, largely due to brighter contributions from its property business which offset a slide in rig earnings.

The world's biggest oil rig builder reported net profit of $457.6 million for the three months ended Sept 30, up from the $346.4 million seen during the same period a year ago.

Its net profit rose 20 per cent to $403 million, if gains from revaluation, impairment and divestments are excluded.

Group revenue dipped 8.4 per cent to $2.95 billion.

Keppel's offshore and marine net order book stood at a record $13.6 billion as of end-September, with work extending to 2019.