basic of well completion
DESCRIPTION
Well CompletionCoil TubingWells EngineeringTRANSCRIPT
BASIC WELL
COMPLETION
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PRESENTATION OUTLINE
1) Well Completion Design Criteria
2) Surface Equipments
3) Subsurface Accessories
4) Artificial Lift
5) Q & A
6) Quiz
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WELL COMPLETION DESIGN CRITERIA
What is well completion ?
An activities and methods necessary to prepare a well
for the production of oil and gas
Reason of having well completion ?
To provide communication between reservoirs and
surface.
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Why well completion is so important ?
Main factor to ensure optimum production and recovery to
meet economic requirement.
To ensure safe production operations (mech.+human) over the field life.
WELL COMPLETION DESIGN CRITERIA
(cont’)
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WELL COMPLETION DESIGN CRITERIA
Open Hole Screen Perforated casing Without Casing
4 types of well completion
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SURFACE EQUIPMENTS
Wellhead & X-mas Tree
Crown Valve
Wings Valve Master Valve
Lower Master Valve
Choke
Wellhead
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SUBSURFACE ACCESSORIES
Objectives of subsurface completion
accessories?
To provide access to the reservoir for
surveillance requirement and well stimulation.
To provide mechanical control to the conduit
for safe transfer of the reservoir fluids to the
surface.
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COMPLETION ACCESSORIES
The typical accessories
used in well completion:
Tubing Hanger
Subsurface Safety Valve
(with control line)
Sliding Sleeve Door (SSD)
Blast Joint
Production Packer
Flow Coupling
Side Pocket Mandrel (SPM)
Landing Nipples
No-go Nipple
Production casing
Perforation
Tubing
Tubing hanger
SCSSV
Landing/Seating
nipple
SSD
Wireline Entry
Guide
1/4” control line
Gaslift mandrel
(Side pocket mandrel)
Flow coupling
Dual packer
Blast joint
No-go nipple Single packer
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COMPLETION ACCESSORIES
Tubing Hanger:
To provide a seal between tubing &
wellhead.
To support tubing.
Tubing hanger
Flow coupling
Flow Coupling:
To protect from internal erosion caused
by high velocity & turbulence flow
resulted from ID reduction of another
completion accessories, i.e. SCSSV
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Subsurface Safety Valve:
To prevent uncontrolled
formation flow from
wellbore to surface by
manipulating hydraulic
line from surface
Surface Controlled
Subsurface Safety
Valve (SCSSSV)
Gas lift Mandrel @
Side Pocket
Mandrels
Gas Lift Mandrel (GLM):
A place for installed gas lift valve for
artificial lift purposes.
COMPLETION ACCESSORIES
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Sliding Side Doors (SSD): To enable communication
between tubing & annulus to
enable circulation or
production of fluid.
To equalize tubing pressure &
annulus pressure.
Landing Nipples:
To provide receptacle to locate, lock &
seal subsurface flow controls
equipment.
Landing
Nipples
Sliding Side
Doors (SSD)
COMPLETION ACCESSORIES
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Production Packers: To provide a seal between the outside of
tubing & the inside of the production
casing or liner.
To protect the casing from pressure &
produced fluids.
To isolate multiple production zones.
To eliminate or reduce pressure surging
or heading.
To hold kill fluids in the annulus.
To permit the use of certain artificial lift
methods.
Production
Packers
COMPLETION ACCESSORIES
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Blast Joint:
BJ To protect from external
erosion or damage caused by
the jetting fluid of the zone
perforations.
COMPLETION ACCESSORIES
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ARTIFICIAL LIFT
What is artificial lift ?
Is a method to assist wells to sustain flow of
oil to surface at adequate rates.
When do we need artificial lift ?
When the reservoir pressure is insufficient to
sustain flow of oil to the surface as a result of
increased water cut and/or pressure depletion.
Why do we need artificial lift ?
To increase production.
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GAS LIFT PRINCIPLES:
The injected gas aerates the fluid column
& reduce the density of the fluid.
As the gas moves up the tubing, it
expands providing the scrubbing action to
bring the fluid column to surface.
With the density of the column reduced,
less reservoir pressure is required to push
the liquid to surface.
In other words, the hydrostatic back
pressure to the reservoir is reduced & the
reservoir pressure can overcome this
reduced pressure & initiates the well to
flow.
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Q & A
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QUIZ
1) What is the objective of well completion ?
To provide communication between
reservoirs and surface.
2) Why do we need artificial lift ?
To increase production.
3) From the diagram, please show:
SCSSV
Blast Joint
SSD
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WELLHEAD & X-MAS TREE
Single X-Mas Tree Dual X-Mas Tree