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WELL COMPLETION

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SINGLE COMPLETION WITH CEMENTED AND PERFORATEDCASING

PerforatedInterval

ProductionCasing

SurfaceCasing

Packer

RESERVOIR

Tubing

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COMPLETION WITH CEMENTED AND PERFORATEDCASING

Advantage:

Selective production Zonal Isolation Water/Gas Shut -off

Disadvantage:

Extra cost (casing and cement, perforation) Formation Damage

Application: Consolidated formation. Multi reservoirs with different pressures.

When dual Completions are required

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OPEN HOLECOMPLETION

RESERVOIR

ProductionCasing

SurfaceCasing

Packer

Tubing

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OPEN HOLECOMPLETION

Advantage: Simple Saving in cost and time

Disadvantage: No selective control Difficult to isolate water or gas Breakthrough Cross flow can not be controlled Not suitable for unstable Formation

Application: Low cost/multi well developments Deep consolidated wells. Naturally Fractured reservoirs.

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OPEN HOLE COMPLETION WITHSLOTTED, PERFORATED OR SCREEN

LINER

Advantage: Simple Cheeper than cemented casing Sand control

Disadvantage:

No selective control Difficult to isolate water or gas Breakthrough Cross flow can not be controlled

Not suitable for unstable Formation

Application:

Sandy wells (stable formation) Horizontal wells completion.

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OPEN HOLE GRAVEL PACK COMPLETION

RESERVOIR

PACKER

LINER HANGER

SURFACECASING

TUBING

PRODUCTIONCASING

SLOTTED,PERFORATED ORSCREEN LINERGRAVEL PACK

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OPEN HOLE GRAVEL PACK COMPLETIONWITH UNDERREAMED HOLE

RESERVOIR

Tubing

Production Casing

Packer

Slotted, Perforatedor Screen Liner

Liner Hanger

Gravel

Underreamed hole

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INSIDE CASING GRAVEL PACK COMPLETION

RESERVOIR

Tubing

Production Casing

Packer

Slotted, Perforatedor Screen Liner

Liner Hanger

Gravel

Perforations

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FRAC AND PACK COMPLETION

RESERVOIR

Tubing

Production Casing

Packer

Slotted, Perforatedor Screen Liner

Liner Hanger

Gravel

Perforations

Hydraulic Fracture

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UNDERREAMED CASING GRAVEL PACKCOMPLETION

RESERVOIR

Tubing

Production Casing

Packer

Slotted, Perforatedor Screen Liner

Gravel

Underreamed Casing/Hole

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SELECTIVE COMPLETION

ZONE 3

ZONE 2

ZONE 1

SLIDING SLEEVES

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Producing a Zone between Packers

Top Packer

Bottom PackerPerforatedInterval

Sliding Sleeve

OPEN CLOSED

Anim. 1Anim 2

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