Total E&P Denmark A/S contracted Nov. 26 with Emerson to provide wellhead pressure monitoring technology to enhance safety during a multi-year redevelopment project to extend the life of Denmark’s biggest gas field.
The Tyra field in the North Sea's Danish section has been in production for more than 30 years, but it's presently experiencing seabed subsidence. Since production started in the 1980s, the seabed has subsided by more than five meters, reducing the air gap between the sea level and the bottom of the platforms. To keep the Tyra field in production, Total is replacing existing wellhead platforms with elevated topsides. The 13-meter-high jacket extensions and new topsides will be installed on top of the existing jacket structures.
During the two-year shut-in, Emerson technology will monitor wellhead casing pressures as a safety measure. With power and cable infrastructure unavailable, a wireless and battery-powered solution is required. Emerson will provide more than 200 Rosemount wireless pressure transmitters to be installed on the four riser platforms. The devices will transmit data to two standalone Emerson DeltaV PK Controllers, to be installed on the offshore accommodation platforms. Data will be presented to construction workers locally on human machine interfaces and relayed to an onshore monitoring point and data historian.
Overall, the Tyra revamp will ensure continuous production from Denmark’s biggest gas field, while safeguarding Danish North Sea infrastructure. The $3.3 billion redevelopment is the biggest ever in the Danish North Sea. Once completed, Tyra is expected to produce more than 200 million barrels of oil equivalent. The current Tyra field has two production complexes, Tyra East and Tyra West, which are linked to satellite fields Harald, Roar, Svend, Tyra Southeast and Valdemar.
