Project Profile
Value: US$7,500 million
Location: Walker Ridge, Blocks 678 (Jack) and 758/9 (St. Malo)
Start-up Year: 2014
Oil Reserves: 500 million bbl
Water Depth: 2,133m
Capacity: 170,000 bpd / 42.5 MMscf/d
Jack:
Discovered in July 2004 by the Discoverer Deep Seas drillship, the Jack oil field is located on Walker Ridge Blocks 758 and 759 in the Gulf of Mexico. Situated in approximately 7,000 feet (2,134 metres) of water, the ultra-deepwater discovery is located 270 miles (435 kilometres) southwest of New Orleans. Drilled to a total depth of 29,000 feet (8,839 metres) on July 29, 2004, the Jack-1 exploration well encountered more than 350 feet (107 metres) of net oil sands pay.
A second well was drilled on the field by the Discoverer Deep Seas drillship, and in the fall of 2006, the Cajun Express semisubmersible recorded an exceptional well test on Jack-2. Drilled on Walker Ridge 758 in 7,000 feet of water (2,134 metres), the record-breaking well reached a total depth of 28,175 feet (8,588 metres) and was the deepest ever to be successfully production tested. Additionally, the well set more than half a dozen world records for equipment pressure, depth and duration. Conducted to test a portion of the total pay interval, the Jack-2 well test maintained a daily flow rate of more than 6,000 bopd, which represents only 40% of the total net pay measured.
Completed in November 2008, the third well, drilled on Walker Ridge 758 by Devon, is an appraisal well, too. Information has not yet been released on the results of this well. Appraisal drilling continues on Jack, but current size estimates foretell one of the largest fields in the Gulf of Mexico. Information available to date, rates the field\'s size as the fifth-largest in deepwater Gulf of Mexico with nearly 500 MMboe. The field is operated by Chevron, which has 50% interest. Partners include Maersk with 25% working interest and Statoil with the remaining 25% working interest.
St. Malo:
Discovered in October 2003 by the Discoverer Spirit drillship, St. Malo is considered to be a major deepwater discovery in the Gulf of Mexico. The field is located on Walker Ridge Block 678 in a water depth of 2,100 feet (640 metres). Chevron is the operator and holds a 51% working interest. Chevron co-ventures on the St. Malo prospect with Petrobras, 25%; Statoil, 21.50%; ExxonMobil, 1.25%; and ENI, 1.25%. Located 250 miles (402 kilometres) south of New Orleans, St. Malo\'s discovery well was spud by the Cajun Express semisub on July 6, 2003. The discovery well is located in 6,900 feet (2,103 metres) of water and was drilled to a depth of 29,066 feet (8,859 metres). More than 450 feet (137 meters) of net oil pay over a gross interval of 1,400 feet (427 metres) was encountered on the field.
On May 4, 2004, an appraisal well was drilled -- one mile (2 kilometres) east of the St. Malo discovery. The well, previously named Dana Point, was a re-entry and deepening of a dry hole that was drilled in 2001. The re-entry well was deepened to a depth of 28,903 feet (8,810 metres) in roughly 7,032 feet (2,143 metres) of water by the Discoverer Deep Seas drillship. The well was re-entered to save costs, cutting US$25 million by not drilling a new well. Evaluation of the appraisal well found that St. Malo\'s hydrocarbon resources span across a larger area than previously suggested by the discovery well.
Field Development:
In May 2009, Chevron awarded Mustang the FEED contract for a joint Jack/St. Malo semisub production facility. With FEED scheduled for completion in the second quarter of 2010, the facility is expected to produce between 120,000 and 150,000 bopd and 37.5 MMcf/d (1 MMcm/d) of natural gas, as well as house provisions for future water injection of 200,000 bpd. Enbridge announced in June 2009 that a letter of intent signed with Chevron could result in the expansion of its offshore pipeline system. The letter of intent proposes to construct, own and operate the Walker Ridge Gathering System to provide natural gas gathering services to the joint development. The operator awarded a contract to Cameron for the supply of subsea production systems for the first stage of the Jack and St. Malo development. The project encompasses a dozen 15,000 psi subsea trees, production control systems, four manifolds and associated connection systems, engineering and project management services. Deliveries are scheduled to begin in the third quarter of 2011 and continue through the second quarter of 2013. A final investment decision for the joint development of the project is expected by the end of 2010.
Operators:
Chevron: 50% interest in Jack and 41.3% interest in St Malo
Statoil ASA: 25% interest in Jack and 21.5% interest in St. Malo
Maersk Oil: 25% interest in Jack
Petrobras America Inc.: 25% interest in St Malo
ExxonMobil: 3.75% interest in St. Malo
Eni: 1.25% interest in St. Malo
Contractors:
Aker Solutions: Pre FEED - Semi-sub and 3 subsea production control umbilicals contract to be built and provide umbilicals for the second stage of the project
Alliance Engineering: Topsides study
BMT Scientific Marine Services Inc (BMT): Environmental and Facilities Monitoring System (EFMS)
Cameron: Subsea production systems, 12 15,000 psi subsea trees to be delivered between Q3 2011 and Q2 2013
Diamond Offshore: Drilling contractor
Dockwise: Transportation of platform hull
Expro: Subsea pumping system
First Subsea: Contract by Chevron U.S.A. Inc. to supply the mooring connectors
Framo Engineering Houston Inc.: Pumping systems
GE Oil & Gas: Three customised aeroderivative gas turbine-generator modules
GVA Consultants: Design of Floater
Heerema Marine Contractors: Towing platforms
KBR: Pre FEED - Semi-sub
McDermott: Fabrication and installation of mechanical and electrical works - umbilicals, jumpers and associated subsea equipment using vessels
Mustang Engineering: FEED – Topsides and detailed design
MyCelx: Produced water treatment system to remove oil and water soluble
Nexans: Power umbilicals and terminations. The contract comprises of three subsea centres tied back to a hub production facility with a capacity of 170,000 barrels of oil and 42.5 million cubic feet of natural gas per day. Nexans\' specialised cable and umbilical manufacturing facilities in Halden, Norway, have designed and manufactured the 42 km power umbilical for the two fields in two separate lengths.
Parker Hannifin: 164,042 feet (50,000m) of polyester mooring rope, accessories and field support services for mooring of Jack and St. Malo floating production unit
TE SubCom: Connect the Jack & St. Malo offshore facility with an undersea fiber optic communications system
Technip: Pre FEED - Semi-sub as well as fabrication and installation of 53 miles of 1.75 inch outer diameter flowlines, steel catenary risers, pipeline end terminations, manifolds, pump stations and tie-in skids
Transocean: Drilling contractor
Wood Group PSN: Commissioning services
McDermott International, Inc.: Contract to transport and install subsea umbilicals, manifolds, jumpers and flying leads to support the brownfield expansion of the Jack and St. Malo fields. McDermott’s subsea construction vessel, North Ocean 102, is expected to transport and install 30 miles of umbilicals and associated flying leads in up to 7,200 feet of water. McDermott’s subsea construction vessel, North Ocean 102, is expected to transport and install 30 miles of umbilicals and associated flying leads. The final jumper assembly is scheduled to be completed at McDermott’s Gulfport Spoolbase in Mississippi prior to installation by McDermott’s Derrick Barge 50 utilizing its deepwater lowering system. The installation campaign is expected to commence in the second quarter of 2016.
Sub Contractors:
BMT Scientific Marine Services Inc (BMT): Tow Simulation Services for Heerema
Bredero Shaw (ShawCor): Subsea insulation coatings
ClampOn: Monitors and detection equipment
InterMoor: EPC - Design and fabricate suction piles