ExplorationGraff-1: Shell spuds billion-barrel wildcat offshore NamibiaSupermajor's Graff-1 probe begins drilling just two weeks after TotalEnergies' nearby Venus-1 wildcat spuddedFlag day: Shell has spudded its key Graff-1 exploration well offshore NamibiaPhoto: REUTERS/SCANPIXIain EsauLondon