Damage to South Sudan’s oil fields after more than two years of civil war will hamper plans to boost output, Petroleum Minister Dak Duop Bischok said, adding the country needs the revenue from pumping more oil to tame an economic crisis.

As he explained in an interview with Bloomberg, the government is currently assessing the extent of repairs that need to be made to production facilities in the northern Unity and Upper Nile states.

Conflict in the world’s newest country cut oil output by a third to about 160,000bp/d. Nowadays is only pumping oil in Upper Nile state after Unity production stalled in 2014. Before the war, China National Petroleum Corp., Malaysia’s Petroliam Nasional Bhd. and India’s Oil & Natural Gas Corp. produced most of the oil, according to Hellenic Shipping News.