ExplorationTurkish Petroleum spuds key appraisal well on 5 Tcf gas discoveryResults from Asmara-2 probe will underpin subsea scheme in 2000 metres of waterLighting up: Turkish Petroleum's Fatih drillship - shown here drilling the Turkali-2 appraisal well in the Black Sea - is now drilling a delineation probe on the Amasra gas find some 40 kilometres away.Photo: TURKISH PETROLEUMIain EsauLondon