Nigeria's state oil company is waiting on paperwork before it commits money to two troubled refineries. The Nigerian National Petroleum Company says it expects technical assessment reports from two Chinese firms. The reports concern the revival of the Port Harcourt and Warri refineries. Only after those assessments arrive can the company move forward with investment agreements. Both plants belong to an older generation of Nigerian refineries that has barely functioned for years. Because domestic capacity is so weak, the country has leaned on imported refined fuel. Restoring the refineries is billed as a route to reducing that import burden. For now the timeline depends on when the Chinese technical teams finish their reports.