ONGC Videsh Ltd's Sakhalin I oilfield in Russia will see production declining to 160,000 barrel per day next year from 190,000 barrel per day, a company official said.
"The field is witnessing a drop in production since last year, due to declining reserves," he said.
OVL, the overseas arm of state-run ONGC, has 20 per cent stake in the Sakhalin I field, where second phase of development will result in rise in production from 2010.
OVL is looking at bidding for exploration blocks in Angola and has been shortlisted by Iraq for award of discovered oilfields, the official said.
The company's Sudan properties have also seen a drop in production to 210,000 bpd from 300,000 bpd.
