Featured Gas OilNNPC signs agreement with NAOC on 4 OMLs By Abisola THOMPSONSeptember 26, 2019 by By Abisola THOMPSONSeptember 26, 20190565 The Nigerian National Petroleum Corporation (NNPC) has signed a novation agreement with Nigerian Agip Oil Company (NAOC) on Oil Mining lease (OML) 60,61,62 and 63.