Overview of Completions - Energy Workforce...Completion Functions •Provide pathway for fluid from...
Transcript of Overview of Completions - Energy Workforce...Completion Functions •Provide pathway for fluid from...
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Overview of CompletionsPESA Oil & Gas 101
Nick Clem, Applications Engineering DirectorGanesh Subbaraman, Engineering Manager
21 May 2015
© 2011 Baker Hughes Incorporated. All Rights Reserved.
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Outline
• Background
• Drivers affecting selection of completion types
• Major completion components
• Examples of completion types
• Evolving Technologies
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Oil and Gas Reservoirs
© 2011 Baker Hughes Incorporated. All Rights Reserved.3Source: Wyoming State University
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Well Life Cycle
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InformationManagement,Drilling Engineering,Data Mudlogging,Rig-Site Supervision
Drilling Dynamics
Drilling Fluid Systems
Formation Evaluation MWD
SteerableDrillingSystems
HighPerformance Bits
CompletionFluids
Pumping,Stimulation,Filtration
CompletionHook-ups
Tubing ConveyedPerforating
Packers
Pre-Pack WellScreens
GravelPackingServices
Safety Systems
Flow ControlEquipment
PerformanceChemicals
PackersCementingEquipment
Automated ProductionSystems
Drilling Completion Production
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Completion Functions
• Provide pathway for fluid from the reservoir into the wellbore
• Provide pathway for wellbore fluids to surface
• Control the production rate from the reservoir
• Isolate problematic sections of the well• Allow access for well maintenance• Enable stimulation
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Building a Well: Cross Section
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conductor pipe
cementsurface casing
intermediatecasing # 1
reservoir
intermediatecasing # 2
production casing/liner
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Outline
• Background
• Drivers affecting selection of completion types
• Major completion components
• Examples of completion types
• Evolving Technologies
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Completion Classification
• Well Path– Vertical– Deviated– Horizontal – Multlateral
• Mode of production– Flowing – Artificial lift
• Number of zones– Single – Multiple
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Artificial Lift
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Other Drivers
• Reservoir type• Target Resource type• Reservoir extent, depth• Regulatory environment• Financial Objectives • Intervention or re-entry costs in well
environment• Subsurface environment• Expected well performance/life cycle• Monitoring requirements• Cost
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Outline
• Background
• Drivers affecting selection of completion types
• Completion components
• Examples of completion types
• Evolving Technologies
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Progression of Completions Through Time
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Structural Devices – Hangers
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• Mechanical devices that anchor sections of pipe.
• Typically use slips to attach deployed pipe to host pipe.
• May be run with packer to provide isolation.
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Subsurface Safety Valve
• Deployed on tubing.
• Prevents uncontrolled flow from a well in the case of an emergency.
• Typically shallowest downhole equipment.
• Activated by a change in conditions
• Designs vary by application.
• Most stringently tested product in completions.
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Isolation Devices - Packers
• Mechanical device –seal between casing and tubing.
• Located above producing zone(s).
• Parts
– Sealing element.
– Slips (anchors).
– Various parts and piston areas that allow setting.
• Well control.
• Corrosion control.
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Packers Types
• Permanent • Retrievable
• Mechanical set• Hydraulic set
• Cased Hole• Open Hole
• Inflatable• Swelling
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Flow Control Devices – Sleeves
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• Position-able valves allowing a flow path between the inside and outside of tubing
• Shifted via several means– Mechanical – Hydraulic– Electric
• Multi-cycle and multi-position versions available
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Flow Control Devices – Nipples
• Profiles placed in tubing able to receive latching accessories
– Accessories include plugs,chokes, check valves
– Accessories typically retrievable
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Filtration Devices - Screens
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• Filters built onto perforated tubing
• Intended to limit the size of particles that can be admitted into the tubing
• Usable in– Open-hole– Perforated casing– In conjunction with
other filtersExpandable
Screens
Premium Screens
Wire-wrappedScreens
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Intervention and Recompletion
• Fishing– Recovering lost equipment or pipe
• Isolation– Setting permanent or temporary
plugs/ flow barriers
• Casing exits– Creating a new wellbore by milling
out of existing casing
• Cleanup– Removing debris from the wellbore
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Conveyance or Deployment Methods
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Outline
• Background
• Drivers affecting selection of completion types
• Major completion components
• Examples of completion types
• Evolving Technologies
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Application Specific Completions
• Sand Control Completions– Aimed at limiting production of solids
• Unconventional Completions– Enable efficient, multi-stage fracturing treatments and
minimize time until production begins
• Intelligent Completions– Allow active control of completion subsystems via electric or
hydraulic control– Limit need to re-enter well
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Sand Control Completions
• Tools & services to minimize or prevent sand production in unconsolidated reservoirs
• Drivers: reliability, production enhancement, efficiency, long term production
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Controlling Sand Production Minimizes…
• Equipment damage
• Maintenance costs
• Well plugging
• Disposal costs
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Sand Control Completion
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Gravel Packing
FormationSand
Wire WrappedScreen
Gravel PackSand
Cased Hole
Gravel Pack Sand Casing
Perforations
Formation Sand
Screen
Cement
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Open Hole
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FracPacking
• Similar to gravel packing
• Higher pumping pressures and rates
• Rock strength or fracture pressure of rock exceeded
• Breaking or ‘Fracturing’ the formation
• Packing near wellbore to similar to gravel packing
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Sand Control Pumping Services
• Slurry– Combination of proppant/sand and
carrier fluid
• Carrier Fluids – Engineered fluids designed to carry
proppant with one viscosity, and then “break” to a lower viscosity allowing to return to surface
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Unconventional Completions
• Completion systems enabling multistage Hydraulic Fracturing
• Drivers: efficiency, reliability, cost
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Plug and Perf
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Setting Tool
Perf Guns
Composite Plug
• Cemented casing liner or full string• Perforate and produce multiple pay zones with Perf Guns / TCP• Composite Plugs provide isolation• Removed by milling with coil or pipe
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Ball Drop Completions
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Coiled Tubing Annular Fracturing
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Intelligent Well Systems
• Wells able to monitor and adjust the condition of downhole devices
• Often in offshore environments, where cost of re-entry is prohibitive
• Enhancements of previously discussed equipment
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Well Monitoring
• Discrete Gauges permanently installed on completion assembly to measure real time
– Discrete Pressure– Discrete Temperature– Flow Rate– Water Cut– Density
• Distributed measurements – Fiber Optic Distributed
Temperature– Distributed acoustic
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Intelligent Well Schematic
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Outline
• Background
• Drivers affecting selection of completion types
• Major completion components
• Examples of completion types
• Evolving Technologies
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Evolving Technologies
• Material Enhancements– Material Science Research– Composites, Nano-Technology– HPHT Elastomers
• Efficient Completions– Interventionless Completions– Disappearing Completions– Drill-in Completions– Electro-Mechanical System
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Overview of Completions
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