Russia's state oil firm Rosneft has agreed to supply nearly 500,000 barrels per day (bpd) of crude to India’s Reliance Industries in the biggest oil supply deal between the two countries, Reuters reported on Thursday. The 10-year agreement is worth roughly $13 billion a year at current prices. Under the deal, Rosneft will deliver 20-21 Aframax-sized cargoes (80,000 to 100,000 metric tons) of various Russian crude grades and three cargoes of about 100,000 tons each of fuel oil each month. Previously, we reported that India is likely to resort…