Mahmoud Mohaddes, director of exploration at the National Iranian Oil has said that the recently discovered Halgan gas field has reserves of 12.4 trillion cubic feet, with an estimated 249 million barrels of condensate gas, Reuters has reported. Of the 249 million barrels of condensates, 98 million are recoverable, he said, adding that once the field is developed, NIOC will be able to produce 50 million cubic metres of gas a day over a 20-year period.