Phoenix / Typhoon Oilfield, Gulf of Mexico, United States of America
The Phoenix (formerly Typhoon) oilfield is located in blocks 236 and 237 in the central Green Canyon area of the Gulf of Mexico. This lies approximately 100 miles off the coast of Louisiana, US, in water depths of 2,000ft.
In 2005, the field's tension leg platform (TLP) was damaged during a hurricane. The structure was turned turtle and mooring was lost.
In 2006, the field was acquired by Energy Resources Technology (ERT) from Chevron, BHP and Noble Energy for redevelopment, and the project was renamed Phoenix. With the acquisition, ERT became the operator with a 100% interest. In 2007, 30% interest was sold to Sojitz GOM.
The operator is redeveloping the field by installing an FPU. The field's production is expected to start in 2010.
Helix Producer I FPU
The Phoenix field will be deploying Helix Producer I, a dynamically positioned (DP), ship-shaped FPU. The unit was designed with a nominal capacity of 30,000bpd. Its maximum oil production capacity is approximately 45,000bpd. The unit is expected to be deployed by the second quarter of 2010.
Helix was contracted to provide the FPU after the hurricane. The work started with recovery of the original flowlines, risers and umbilicals, which had fallen to the sea floor, and repairing the oil and gas export pipelines. Helix further proceeded with transformation of M / V Karl, an ice-class train ferry into the FPU.
The upgradation involved six 12MW electric thrusters and dual 4000lb hydraulic thrusters for dynamic positioning.
The disconnectable turret system (DTS) buoy was installed by Helix's Q4000 drilling vessel. A 2,500t production module was installed and module interconnection is in process.
The converted vessel is owned by Kommandor LLC, which is a joint venture of Helix and Kommandor Rømø A / S. The vessel is 161.5m long.
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Phoenix field development
The Phoenix field will be developed as subsea wells tied to the Helix Producer I FPU. The existing eight wells from Typhoon will also be completed as subsea and tied to the FPU.
The average production from two Typhoon wells and two Boris wells was 13,000bopd and 21 million cubic feet per day before the hurricane.
Two other wells - Typhoon#4 and Little Burn - were not in production at that time. Another well is expected from Phoenix.
Initial production was planned to come from four wells tied to the FPU.
The operator planned to use the existing wellhead equipment and new umbilicals, flowlines and jumpers were installed as part of the subsea production system. Installation of riser will be carried out by the Helix Intrepid pipelay vessel.
Topsides and risers
The topsides were designed and produced by Oil Field Development Engineering. Fabrication and integration was carried out by Kiewit Offshore Services.
The riser hang-off structure and buoy for the FPU was provided by Flexible Engineered Solutions. The riser system consists of four disconnectable risers -two for production, one for oil export and one for gas export. The flexible risers were provided by Wellstream.
The contract for commissioning services and offshore personnel for the FPU was awarded to Wood Group by Helix in December 2009. The ten topside production modules will be installed over the hull in Ingleside, Texas, US.
A letter of indent for the supply of flexible risers and jumpers for the project was given to Wellstream International by ERT in October 2006.
The work under the agreement included two production risers, one oil export riser, one gas export riser and four production jumpers.