With Tullow Oil’s shares trading at their lowest levels since 2009, results of the Frégate well currently drilling on Block 7 offshore Mauritania will be closely watched. Exploration elsewhere on the West African coast has not so far matched the spectacular success of Ghana, and Tullow cites Mauritania, as well as Côte d’Ivoire, as the region’s best prospects. Frégate spudded in mid-August, and with rig rates estimated at $1.2m/day, plus $10m mobilisation and demobilisation costs, the bill is expected to be heavy.