Nayara Energy, erstwhile known as Essar Oil, operates a 20 million tonnes a year oil refinery at Vadinar. : Russian oil giant Rosneft-led Nayara Energy on Friday unveiled a USD 850 million expansion plan for its Vadinar refinery in Gujarat, marking its foray into the petrochemical business. Nayara Energy, erstwhile known as Essar Oil, operates a 20 million tonnes a year oil refinery at Vadinar. In the first phase, the company plans to set up a 450,000 tonnes per annum polypropylene plant, its CEO B Anand said after the firm signed an MoU committing the investment.