The adjusted profit for the period was 827 million euros ($917.4 million), down from 2.16 billion euros a year earlier, when oil and gas prices, as well as refining margins, were much higher.
Analysts had expected an adjusted profit of 706 million euros, according to a consensus forecast provided by the company.
Net profit declined to 308 million euros from 1.15 billion euros in the same quarter last year.
($1 = 0.9015 euros)
(Reporting by Pietro Lombardi; Editing by David Latona)