Seplat Petroleum Development Company Plc (Seplat) is a Nigeria-based company engaged in oil and gas exploration and production. The Company's segment is the exploration, development and production of oil and gas related projects located in Nigeria. The Company's portfolio consists of approximately six blocks in the Niger Delta, including oil mining lease (OML) 4, OML 38, OML 41, OPL 283, OML 53 and OML 55. The Company has a working interest in OMLs 4, 38 and 41, which are located in Edo and Delta States onshore Nigeria. The Company has a non-operated working interest in the Umuseti/Igbuku Marginal Field Area of OML 56. The Company has working interest in OML 53, which covers an area of approximately 1,585 square kilometers and is located onshore in the northeastern Niger Delta. Seplat has a working interest in OML 55, which is located in the swamp to shallow water offshore areas in the southeastern Niger Delta.