“This terrorist operation, a subversive operation of the highest order, took place in a farming area, causing extensive damage,” Ghassan al-Adel told Sana.
The blast left a crater 15m (50ft) wide and oil gushing from the broken pipe, the Sana news agency said.
Two weeks ago, on 13 July, a fire damaged a gas pipeline near the town of Mayadin in the country’s main oil and gas-producing region of Deir al-Zour province, activists said at the time.
Oil production in Syria stands at about 350,000 barrels per day, according to official data. It is a key source of income for the Syrian economy, hard hit by more than four months of unrest.