In 2013-14, IOC, which owns 30 per cent of the nation's oil refining capacity, turned 54.65 million tons of crude oil into fuel. Of the crude oil processed, 16.1 per cent was heavy and high TAN (total acid number) crude.
Heavy crudes, like the one produced in Latin America, are cheaper than most of the varieties available from the Middle-East as they have high concentration of sulphur and several metals, particularly nickel and vanadium, which require higher grade refineries for processing. Same goes for high acid crudes or high TAN crudes.
In pursuit of this plan, IOC has been enhancing capabilities of its refineries to process cheaper crude varieties as well as initiated action to provide optimum crude mix to refineries.
"During 2013-14, the Corporation's refineries processed 16.1 per cent heavy and high TAN crudes vis-a-vis 11.5 per cent in 2012-13. Plans are afoot to raise this proportion to 20 per cent by 2015-16, and 30 percent by 2017-18," it said.
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With its 15 million tons a year Paradip refinery being commissioned this fiscal, the same will increase to 67 per cent.
IOC Chairman B Ashok said improving gross refining margins (GRM) as a means to improve profitability has been one of the biggest challenges for the company.
"For this, we have been enhancing the capabilities of our group refineries to process cheaper grades of crude oil and also maintaining an optimum mix between term and non-term contracts for crude oil purchases for cost benefit," he said.
IOC and its subsidiary company, Chennai Petroleum Corp Ltd, together own and operate 10 of India's 22 refineries with a total refining capacity of 65.7 million tons per annum accounting for 30.54 per cent of country's refining capacity.