Bundles and towed installation

18

Bundles and towed installation

BP KINNOULL – BUNDLE LAYOUT

Production pipe = 14 in

Gaslift pipe = 6 in Methanol injection pipe = 3 in

Kinnoull drill centre

Intermediate towheads Bundle 4

Carrier pipe = 34.5 in

Insulation

Bundle 3

Andrew platform

Intermediate towheads

Bundle 2 Intermediate towheads

Bundle 1

PLEM towhead

This field layout represents one of the most complicated field developments using multiple bundles to date. It is the longest ever bundle tie back at 27.1 km (16.8 miles) utilising four bundles interconnected to BP’s Andrew Field. The longest individual bundle was 7.2 km (4.4 miles)

Carrier Pipe = 876 mm (34.5 in) Sleeve Pipe = 508 mm (20 in) Production Pipe = 356 mm (14 in) Gas Lift Pipe = 152 mm (6 in) Methanol Injection Pipe = 76 mm (3 in)

ADDITIONALFEATURESNEEDEDFORRE-USABLEBUNDLES

ADDITIONAL FEATURES NEEDED FOR RE-USABLE BUNDLES ƒ Marginal, short-term field developments ƒ One-off bundles may not be economically viable ƒ Requirements ƒ Ability to decommission and reposition ƒ Options ƒ Additional piggable ballast water line ƒ ‘Flat-pack’ with piggable core line ƒ Economics can be attractive to the operator ƒ Slightly more expensive for first installation ƒ Reduced or no construction costs for second field ƒ Issues of straps and refloating of tow/trailheads ƒ Cassandra N ˚ 2