Presented at OMAE San Francisco in 2014 by Paul Chittenden, this presentation shows how oil and gas operators are using real-time monitoring to extend the life of their production platforms.
Operators are using Pulse's monitoring technologies for some of the following:
• Extending operating life
• Structural Integrity (Storm Events)
• Optimising inspection programs
• Early warning systems (Structural or Foundational)
• Assessing Repairs
• Increasing deck mass
• Adding conductors / risers
• Collision detection
• Design verification (New Installations)
5. www.pulse-monitoring.com
Operating Past Design Life
• Asset life extension being
driven by:
– Technological Advancements
– High price of oil
– Increasing use of subsea
tiebacks
– Operator focus on cutting costs
Why?
6. www.pulse-monitoring.com
Why are Clients Monitoring?
• Extending operating life
• Structural Integrity (Storm Events)
• Optimising inspection programs
• Early warning systems (Structural or Foundational)
• Assessing Repairs
• Increasing deck mass
• Adding conductors / risers
• Collision detection
• Design verification (New Installations)
10. www.pulse-monitoring.com
Monitoring Technologies
Data Processing and Reporting
• Spectrum of the motion data (Acceleration versus Freq)
• Natural frequency determination
• Integration of time series (Displacement)
• Wave information (Wave height, Period or directions)
• Screens of anomalies
• Repair / modification verification
– Decrease of displacement
12. www.pulse-monitoring.com
Valemon Jacket Monitoring
• Monitor pre-drilling phase:
– Monitor deflections of jacket and
jackup
• Confirm that equipment is operated
within design limits:
– Confirm that jacket deflections
remained within expected levels
• Validate & calibrate simulation models:
– Compare measured and predicted
responses to improve models for future
operations
Client requirements
Increased motion
after jacking up
19. www.pulse-monitoring.com
Valemon Jacket Monitoring
Data – Valemon Jacket Motion / Wave Height
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0 1 2 3 4 5 6 7 8 9 10
Displacement(m)
Significant Wave Height, Hs (m)
Pulse E.On Huntington Data Processing Support
MAXIMUM MEASURED AND PREDICTED LATERAL MOTION ON JACK-UP
Motion Logger POD-0007, 29/11/2012 - 24/01/2013
Maximum Measured Displacement Calculated (Nobel Denton)
Nobel Denton Hs vs. Displacement
20. www.pulse-monitoring.com
Valemon Jacket Monitoring
Data - Jacket Motion Fatigue
0
2
4
6
8
10
12
14
1.0E-10
1.0E-08
1.0E-06
1.0E-04
1.0E-02
1.0E+00
13-Feb 17:02 16-Feb 17:02 19-Feb 17:02 22-Feb 17:02
SignificantWaveHeight,Hs(m)
CumulativeDamage
Event Timeline
Statoil - West Elara And Valemon Platform Monitoring Campaign
CUMULATIVE FATIGUE DAMAGE - UPPER HP RISER
Measured Data - 13/02/2013 - 25/02/2013
Measured Data Predicted Data Significant Wave Height Hs
21. www.pulse-monitoring.com
Valemon Jacket Monitoring
• Monitoring system’s demonstrated responses of critical equipment
remained within design limits during campaign length
• The jacket moves 25-33% as much as jackup
• Complex responses of the jackup to wave loading observed
• Preliminary model calibration achieved, but difficult to fully
calibrate at this stage
Outcome
22. www.pulse-monitoring.com
• Platform monitoring is integral
to the IM Strategy of offshore
platforms
• Online Monitoring is used to
measure actual response vs
predicted responses to
validate design and improve
models for future operations
• Data used to make informed
decisions on life extension of
assets
Conclusion
Conclusion