Türkiye Petrolleri Anonim Ortaklığı (TPAO) raised estimated gas reserves in Sakarya field, Western Black Sea, based on data from the Tuna-1 ultra-deepwater exploration well.
Drilled with TPAO’s Fatih 6th generation drillship in 2,117 m of water in block AR/TPO/KD/C26-C27-D26-D27, the well reached total depth of 4,775 m and encountered an additional 30 m gas-bearing reservoir in Early Pliocene-Late Miocene sands.
The additional sands raised estimated lean gas reserves from 320 billion cu m (11 tcf) in the original discovery announcement to 405 billion cu m (OGJ Online, Aug. 21, 2020). The field is the largest in the Black Sea and one of the largest 2020 gas finds in the world, the operator said.
TPAO plans to drill two back-to-back appraisals with Fatih. The Kanuni drillship will carry out well tests. A pre-FEED agreement has been signed for concept selection to produce first gas by early 2023.
TPAO has 100% equity in the block.