The contract has been awarded as part of the two firm’s Subsea Integration Alliance consortium.
Under the contract, Schlumberger-Subsea 7 consortium will be responsible for providing engineering, procurement, construction and installation (EPCI) of end-to-end production solutions at the Sakarya gas field.
The integrated project will cover the subsurface solutions to onshore production. These include subsea production systems (SPS), well completions, subsea umbilicals, risers, flowlines (SURF) and an early production facility (EPF).
Subsea 7 will undertake EPCI of the subsea pipelines and associated equipment to connect the subsea wells to the EPF.
The firm will also install infield flowlines, control umbilicals, tie-in connections, associated subsea equipment, 170km of gas export pipeline and monoethylene glycol injection pipeline to the EPF.
Subsea 7 said it has already started project management and engineering work under the contract.
Schlumberger will deliver well completions scope, as well as the design, construction, and commissioning of the early production facility.
The EPF will be capable of handling up to 350MMscfd of gas.
OneSubsea will deliver the SPS and SURF scope.
Subsea Integration Alliance CEO Olivier Blaringhem said: “This combined offering provides our customer with a truly integrated solution for field development. A strong, collaborative early engagement process led by Turkish Petroleum has enabled an industry-leading timeline from discovery to first gas for a project of this scale and complexity.”
Subsea 7 said its revenue share of the contract would be more than $750m.
Located approximately 100 nautical miles into the Black Sea, the Sakarya field is said to hold the country’s largest gas reserve.