The explorer has so far encountered 400 ft of reservoir pay zone in an area where it has three other producing fields. The move is part of Delek’s strategy to expand its operations beyond the Eastern Mediterranean region. Shell, meanwhile, is in the midst of a $10-billion divestment program. Noble’s farm-in to blocks recently awarded to Shell marks the Houston-based independent’s entry into Colombia, where the government hopes to boost offshore exploration. The major’s dominant showing in US Gulf of Mexico Lease Sale 252 propelled another rise in bids and dollars for the biannual regionwide auction.