The Keta - Togo - Benin (KTB) Basin stretches across offshore and onshore Nigeria, Ghana, Togo and Benin in the Gulf of Guinea. It is an abrupt margin basin, with a thick sedimentary fill. The Togo sector is a narrow stretch of the basin sandwiched between Ghana and Benin. Compared to the giant discoveries of adjacent basins, the Niger Delta fan for example, the KTB Basin has yielded low discovered volumes. However, the large 2013 Ogo discovery in Nigeria sparked new exploration interest in the basin.