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Structural well integrity phase 3 – evaluate model predictions and measurement data and utilize and benefit from measurements

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Andreas Buvarp Aardal Andreas Buvarp Aardal
Engineer

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Challenge

Monitoring is believed to help answer questions regarding uncertainties in the loads acting on the wellhead system. However, measurements have their own uncertainties related to the accuracy of the captured responses which are subject to interpretation and processing in order to calculate the fatigue stress. Such uncertainties need to be identified and handled in a systematic and consistent manner.

Solution

Provide oil operators with a comparison of global analysis loads vs. measured loads from their monitoring campaigns and give access to DNV GL’s data platform.
Prepare a guideline on how to address uncertainties in wellhead fatigue analysis methods based on measurements and safety factor reductions for fatigue damage.

Benefits

Improved confidence in the loads acting on the well allow for corresponding adjustments (reductions) in the safety factor without compromising the reliability level. This can lead to optimized well design and extended drilling time on each well.

Value

Extended drilling time on wells will have a great cost reduction potential.
The cost of drilling a new well is estimated to be 100 million USD.