Shafa, A.A. Rano, Matrix, others get marginal oil field licence On …DPR targets early first oil from 100mb reservoirs By Obas Esiedesa, Abuja Indigenous oil firms, A.A. Rano, Shafa Exploration, Matrix Energy, and Vhelblerg Exploration were among oil companies awarded marginal oil field licence by the Department of Petroleum Resources, DPR, on Monday. The award came a year after 2020 marginal field bid round began with 591 companies applying to win 57 oil fields on offer. The oil fields are located onshore, swamps and offshore. DPR estimates that Nigeria would produce additional 100 million barrels of crude oil from the 57 fields, in the coming years.