Behzad Salari said the refinery processes 53 mcm/d natural gas and injects it to the national gas trunkline.
He further said nearly 30mcm/d of the gas from the phases is transferred to other refineries of the complex for processing.
The fourth refinery is a supplier of high-quality propane and butane.
It can produce 1,000 tons of propane and over 700 tons of butane per day.