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Cascade and Chinook Subsea Development, Gulf of Mexico

Location

Gulf of Mexico

Development Strategy

Subsea wells to FSPO

First Oil

January 2012

Water Depth

2,600m

Block

Walker Ridge Block

Shore

Around 300km (180 miles) south of Louisiana

Wells

Cascade – Two wells

Chinook – 1 well, 30km south of Cascade

Depth

27,000ft

Subsea Contract Cost

$200m

Chinook Flowline Scope

2 x pipe-in-pipe flowlines

Length

12 miles each

Subsea Power Cables and Umbilicals Cost

$65m

Length

230,000ft (70km) of high-voltage cables

Operator

Petrobas

Equity

Cascade Petrobras 50%

Devon Energy 50%

Chinook Petrobras 66.67%

Total E&P 33.33%

Engineering Services

Granherne

Subsea Systems Contractor

FMC Technologies

Chinook Flowline Installation

Heerema Marine Contractors (HMC)

Subsea Power Cables, Dynamic Steel Tube and Control Umbilicals

Aker Kværner

Flare Modules

DPS

Systems Integration

BMT Scientific Marine Systems, Sonardyne International (Integrity monitoring software system)

Certified Verification Agent

Det Norske Veritas (DNV)

Cost

$740m

Oil Storage

600,000 barrels

Processing Capacity

80,000bpd

Natural Gas Export Capacity

16mmcfpd

Turret Buoy

Detachable

Mooring

Polyester

Piles

Torpedo piles and vertical loaded anchors

Export

APL detachable and submerged turret
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