Istanbul – A new milestone has been reached in the development of the Sakarya Gas Field in the Black Sea, as London-based subsea engineering firm Subsea7 announced it has secured a “major” variation order from Türkiye Petrolleri Offshore Technology Center AŞ (TP-OTC).
The contract is an extension of the Sakarya Phase 3 development agreement previously announced on August 27, 2025. The new scope includes tying the recently discovered Göktepe field into the Phase 3 floating production unit.
Operations at 2,200 Meters Depth
Under the project, Subsea7 will carry out engineering, procurement, construction, and installation (EPCI) of approximately 20 kilometers of flexible pipelines, 120 kilometers of umbilicals, one rigid production riser, and related subsea equipment. Operations will take place at a water depth of 2,200 meters.
According to reports in the British press, project management and engineering services will be coordinated through Subsea7’s Istanbul office, while offshore operations are scheduled for 2027 and 2028.
Contribution to Turkey’s Gas Supply
David Bertin, Senior Vice President of Subsea7’s Global Project Centre East, said the company is proud to continue its collaboration with TP-OTC in the Black Sea. He noted that the development of the Göktepe field through the Sakarya Phase 3 facilities will increase production and contribute to Turkey’s gas needs.
Hülya Özgür, Director of Subsea7’s Turkey Business Unit, also expressed satisfaction with the long-standing partnership with TP-OTC, stating that the project will make a significant contribution to the development of Turkey’s energy sector.
Previous Contract Valued Up to $1.25 Billion
In August 2025, Subsea7 announced it had signed a contract with TP-OTC for the third phase development of the Sakarya Gas Field, valued between $750 million and $1.25 billion. The agreement covered the expansion of production infrastructure in the Black Sea.
Earlier in 2025, the company also disclosed a separate agreement with TP-OTC worth between $50 million and $150 million for inspection, maintenance, and repair services at the Sakarya field.
Subsea7, whose shares are listed on the Oslo Stock Exchange, operates in more than 30 countries. The company has completed over 1,000 projects to date, operates a fleet of 30 survey and construction vessels, and employs approximately 15,000 people. It reported revenue of $6.8 billion last year.
With the new variation order, integration of the Sakarya and Göktepe fields is set to accelerate, supporting Turkey’s goal of increasing natural gas production capacity in the Black Sea.
Source: Patronlar Dünyası/ Prepared by: İlayda Gök