digital intelligent artificial lift...gas lift rate. ipo gas lifting from 11thipo at 6827’ md....
TRANSCRIPT
Digital Intelligent Artificial LiftTechnology | Application | Justification | Operation
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© 2019 | Silverwell Ltd | All Rights Reserved
Gas Lift Production Optimization is Difficult
� Is my well completely unloaded?� Is the well multi-point injecting?� What is my lift depth?� Am I optimized on gas lift?� Can I lift deeper?� Is my wellbore hydraulic model a good match to actual well performance?� How much will I have to intervene?� Do I have enough gas?� What should be my lifting life-cycle?
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© 2019 | Silverwell Ltd | All Rights Reserved
Legacy Technology Challenges
� Narrow Operating Window.� Design safety margins.� Injection depth limited.� Difficult to assess lift effectiveness.� Intervention to optimize.� Sensitive to well dynamics.� Multi-point injection.� Valve Chatter
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Technology & ApplicationOvercome limitations of existing gas-lift technologyImprove life-of-well production economics
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© 2019 | Silverwell Ltd | All Rights Reserved
Features Benefits
• Variable orifice size at any depth
• Deeper injection
• No deviation limitation
• No well intervention • Pressure and
temperature data
• Remote monitoring and control
• Intelligent field-wide management
Eliminate intervention
Reduce OPEX
Mitigate instabilities
Enhance recoveries
Optimize production
Reduce HSE risk
Digital Intelligent Artificial Lift - DIAL
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© 2019 | Silverwell Ltd | All Rights Reserved
Product Specification
� Multiple units per well.
� Controlled by a single ¼” TEC and SCS.
� 6,000psi Collapse rated Pressure.
� 10,000psi Burst rated Pressure.
� 2-7/8”, 3.5” and 4.5” tubing configurations.
� 125°C Max. rated Temperature.
� Binary Actuation, real time gas injection rate.
� Max. choked Flow Rate 6MMscfD.
� Fully MR0175 / ISO 15156 compliant.
� Electron Beam Welded construction.
Electrical ConnectionMetal-to-Metal Seal
Electronics HousingDownhole Control
System (DHCS)
Valve Housing6 x Gas Injection Valves
and Orifices
Actuator HousingBinary Actuator Systems
Annulus and Tubing Sensors
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Actuator and Valve Technology
Reverse Flow Check Valve
BellowsActuated Valve
OrificeVenturi option
Actuator
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All 6 valves open
1 valve open
Silverwell Operating Window
Typical standard gas lift valve
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Operating Envelope - Performance Comparison
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Electronics & Sensing Module
Actuator Housings(Up to 3 valves per unit )
Top
Bottom
Lower Electrical Connection
Upper Electrical Connection
2-7/8” & 3-1/2” slimline DIALMandrel / Body
© 2019 | Silverwell Ltd | All Rights Reserved
Efficient Production OptimizationDIAL User Interface
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Justification & OperationEnhance life-of-well business caseField proven technology
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© 2019 | Silverwell Ltd | All Rights Reserved
Comparative Performance TestingImproved lift performance throughout well life in the Permian – single well
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IPO Silverwell Added Value
Year Water Cut Reservoir P (Psi) TBFD BOPD TBFD BOPD % BOPD
Early life 50% 3456 718 358 839 417 16.5% 59
Mid life 60% 2112 313 125 519 208 66.4% 83
Late life 80% 1500 156 31 246 48 54.8% 17
• In all three reservoir pressure cases, the Silverwell DIAL installation yields a higher production rate through deeper injection.
• DIAL technology eliminates multipoint injection.
• DIAL remote control technology enables Gas Assisted Plunger Lift (GAPL) in late life.
417
208
48
358
125310
100
200
300
400
500
Early Mid Late
BOPD
Elapsed Time (Years)
Barrells Oil per Day
Silverwell IPO/Conventional
© 2019 | Silverwell Ltd | All Rights Reserved
Single Well - Early-life Performance ComparisonDeeper injection | More production | No multi-pointing | Less stations
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SilverwellGas Lifting from DIAL unit at 8056’ MD – Station 6.Production Rate = 833 BFD• The well is injecting as
deep as possible, with the 1100 Psi compressor discharge at surface.
• The predicted production rate is 834 BFD, 417 BOPD, 50% water cut, injecting 610 MCFD.
• The port size at the operating valve can be changed from the surface to further optimize the gas lift rate.
IPOGas Lifting from 11th IPO at 6827’ MD.Production Rate = 718 BFD• The well is multi-pointing
as 4 IPO valves are open, and capable of passing gas.
• Casing pressure can be reduced to attempt to close the upper valves, but, production rate drops with less gas injected injection will transfer to an upper valve.
© 2019 | Silverwell Ltd | All Rights Reserved
BenefitsObserved from DIAL gas lift wells
15% Oil Gain Mitigating Instability 25% Gas Savings
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© 2019 | Silverwell Ltd | All Rights Reserved
Case History 1Well OptimizationThrough downhole gauge measurement, the operator recognised the opportunity to increase gas injection rate from 400 to 500MCFD.
Silverwell DIAL valves were opened, decreasing casing pressure.
Net Oil Production increased 10% from 217 to 239BOPD.
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© 2019 | Silverwell Ltd | All Rights Reserved
Case History 2Mitigating Instability8/64th orifice size causing multi-point injection and well instability.
Upper IPO valve continuously opening and closing.
Operator increased the port size to 10/64 by opening an additional valve. Well stability achieved.
Valve closed to replicate issue and confirm the DIAL action.
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© 2019 | Silverwell Ltd | All Rights Reserved
Case History 3Gas ManagementThrough downhole gauge measurement, the operator recognised the opportunity to reduce the gas injection rate.The valve combination was changed from 18/64 to 12/64ths.The operator increased casing pressure and increased Net Oil Production by 18%.
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© 2019 | Silverwell Ltd | All Rights Reserved
Gas Lift OptimizationFrom Months to Minutes
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GL System & well test data collated
Prod. Eng. reviews reports
Collect Report
Prod. Eng. model data and analyze
Model
Prod. Eng. make decision
Review
Ops make changes to GL System
Act
DIAL-It-In™ Continuous Process
© 2019 | Silverwell Ltd | All Rights Reserved
Eliminate production uncertainty, instabilities and operational costs with continuous, intervention-free, artificially lifted well optimization.
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More production Accelerating return-on-investmentincreased well production from enhanced lift efficiency
Less intervention Reducing opex & riskreduced well down-time from intervention-free operation
More data Informing production optimizationincreased insight from multiple in-well sensors
Less uncertainty Enabling management decisionsreduced misunderstanding from integrated gas lift system
© 2019 | Silverwell Ltd | All Rights Reserved
Qualification TimelineQualification & test summary for DIAL gas lift optimization system
2010Flowloop test at Shell Rijswijk
Electromagnetic compatability testing of DIAL system
2013Material abrasion & erosion testing at National Physics Laboratory
PDO pilot installation in Oman
Sour gas exposure testing at TWI
Bellows fatigue testing (sour gas & air) at TWI
Seal explosive gas cyclic testing at Element
DIAL transport vibration testing at Alphatec
2016Actuator gas functionality testing at Vaseco
125 deg C PCB HALT at Alphatec
PTTEP pilot installation in Thailand. 2015Coated check-valve erosion testing at IRIS
Bellows explosive gas cyclic testing at Element
Metal seal gas cyclic testing at BHR Group
E-Beam HP gas cyclic testing at BHR Group
2011Ingress Protection (IP) testing of Surface Control Systems at Alphatec
2017Uncoated check valve erosion testing at BHR Group
Tatweer pilot installation in Bahrain.
2014Magnet assembly FEA & shear strength testing at TWI
HPHT static gas seal testing at Eelement
Seal explosive gas cyclic testing at Element
DIAL HALT at Alphatec
DIAL & actuator gas functionality testing at Vaseco
Bellows explosive gas cyclic testing at Eelement
DIAL flow testing at SWRI
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Thank you !Questions ?
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