The company had suspended production of petroleum products at its plant I for a period of 27 days and plant II for 18 days due to floods that caused due to record rainfall.
"The production is being ramped up to full levels in plant I. Production at plant II was also scaled up," the Chennai-based company said in a statement.
In order to minimise the impact of the closure, the company has taken up action to scale up the production to the maximum extent in the coming months, it said.
Shares of the company closed up 3.29 per cent at Rs 31.40 on BSE.