flooding detection system for flexible annulus integrity ......riser condition •riser integrity...
TRANSCRIPT
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MCE Deepwater Development 2017
NH GRAND HOTEL KRASNAPOLSKY • AMSTERDAM • 3-5 APRIL 2017
Flooding Detection System for
Flexible Annulus Integrity Monitoring
Olivier MESNAGE
TechnipFMC
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MCE Deepwater Development 2017
• Interest of DTS monitoring
• Annulus Flooding Detection
• Global SURF surveillance system
• TechnipFMC complete DTS offer
• From the instrumented riser to the Monitoring software
AGENDA
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MCE Deepwater Development 2017
Optical fiber distributed sensing (DTS) integrated in flexible risers increase safety revenues
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MCE Deepwater Development 2017
What DTS Monitoring will bring to operators
1- OPEX reduction
• Digitalization: better productivity
• ROV cost cutting
• Inspections cost cutting
2- HSE improvement
• Better knowledge of riser condition
• Riser integrity improvement
• Early leak detection
3- Production improvement
• Hydrates plugs detection
• Flow management improvements
DTS is your permanent subsea vision:
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MCE Deepwater Development 2017
DTS reduces OPEX: a single sensor for all
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N° Parameter of interest By ROV
By topsideInspection
By DTS
1 Temperature under stiffener
2 Bend stiffener presence
3 Annulus flooding condition
4 Marine growth thickness
5 Hydrate presence
6 Buoyancy clamp sliding
7 Vertical anchor integrity
8 Touch down point stability
9 Riser trenching 9
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DTS: Comprehensive and single digital source information
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MCE Deepwater Development 2017
DTS improves HSE: a single sensor does better
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DTS: real time surveillance of key integrity concerns
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(Source : Sureflex_2010)
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1 6
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2 5
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MCE Deepwater Development 2017
• With DTS temperature along the riser, bore temperatures in the full riser section can be calculated and allow:
• Detection and localization of hydrates and wax plugs
• Maximum temperature capacity of the riser system (cold & hot spot surveillance)
• DTS will be useful during shut down & restart operations
DTS improves production:
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DTS: a useful tool for flow management
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MCE Deepwater Development 2017
TechnipFMC: 15 years of experience in DTSDTS: Distributed Temperature Sensing with optical Fiber
15 years ago:First qualified prototype with DTS
10 years ago:First operational risers with DTS
3 years ago:DTS qualification for flooding detection
Today: Real time DTS condition monitoring
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MCE Deepwater Development 2017
• 1 year full scale test campaign to validate annulus flooding models
• 6” Riser tested with real operating condition
• 0,5 l/min water ingress flowrate is sufficient for detection
• 5°C temperature difference between bore and seawater is sufficient
• 64 configuration tested in blind mode to benchmark algorithm
Flooding detection qualification
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MCE Deepwater Development 2017
• The riser is delivered with two integrated steel tube in one armour layer
• The cost impact on the Riser procurement CAPEX is optimized
• More than 80 risers have been manufactured in 5 years
The offer: TechnipFMC DTS-ready Riser
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MCE Deepwater Development 2017
• TechnipFMC will deploy an optical fiber in the riser offshore
• TechnipFMC offer will include a DTS monitoring unit designed by Omnisens
• Omnisens has been part of the full scale flooding test
• Long term agreement plan
• Omnisens has a significant oil & gas track record including offshore deployed systems
The offer: TechnipFMC DTS system
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MCE Deepwater Development 2017
• e-surf real time monitoring software
• Outer sheath breach detection
• Water diffusion in annulus detection
• Secured HTTP based software accessible from any web browser
• HTML5 interface deployable on all types of supports
The offer: TechnipFMC real time monitoring software
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MCE Deepwater Development 2017
Investing in a DTS monitoring for flexible risers will benefit to operators:
• Integrity Management OPEX cost will be reduced
• IM productivity will be improved
• Riser operation safety will be improved
• Riser production capacity will be improved
Operators should now ask riser project teams to request DTS option in tender
Conclusions