ExxonMobil has expanded its presence in the Walvis Basin by signing agreements for four new blocks adjacent to the maritime border with Angola. The company announced on 24 April that it had signed an agreement with the government and the National Petroleum Corporation of Namibia (Namcor) for blocks 1710 and 1810, and farm-in agreements with Namcor for blocks 1711 and 1811A.The blocks extend from the shoreline to about 215km offshore in water depths of up to 4,000 metres.