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Amirul Hakim Bin Mat AzaharBernadine Bungan Salo

Heikal Hayat

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INTRODUCTION Oil platform is a large structure with facilities to drill wells, to

extract and process oil and natural gas.

Oilplatform

Bottom-supportedplatform

Floating

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Bottom-supported platform

Bottom-supportedplatform

Fixedplatform

Complianttower

TensionLeg

Platform

Jack-upRig

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FixedPlatform

Consist of ajacket

Deck on topproviding space

for crewquarters,

productionfacilities anddrilling rig.

economicallyfeasible for

installation inwater depthsup to about1,700 feet

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Advantages

Very stable

Not mucheffected bywind and

waterforces

Supportlarge

number ofwells

Cansupport

large deckloads

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Disadvantages

Cost increasesexponentially

with depth

High capital

andmaintenance

costs

Notreusable

Corrosion ofsteel

members

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CompliantTower

Narrow,flexible

tower andpiled

foundation

Sustainsignificant

lateraldeflections

1500 to3000 feet

Canwithstandhurricaneconditions

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TensionLeg

Platform

Tensionedtendons

connected

to the seafloor

Nearly non-existentverticalmotion

Can reachdepth up to4000 feet

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Advantages

Stable

Low cost

increasewith depthincrease

Lowmaintenance

cost

Mobileand

reusable

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Disadvantages

Highinitialcost

Highsubseacost

Fatigueof

tension

legs

Little ornostorage

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Primarily exploratory drilling with movable

legs

Towed to the site and legs are jackeddown

Legs penetrate the sea bed and theplatform is raised

Shallow depth: 90

140 m

Jack-up Rig

Buoyant hull fitted with movable legs

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Advantages

Stable when

elevated Low cost

Mobile

Disadvantages

Restricted to

shallow areas Depends on

weather forplacement

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