Summary
A new system for real-time optimization and automated control of the
drilling process has been tested successfully on the Statfjord C platform in
the Norwegian sector of the North Sea.
The demonstrated system uses continuously calibrated dynamic process models
combined with real-time drilling-data input to calculate available parameter
windows, and forward-model simulations are applied to provide optimized
operational parameter sequences. The calculation results are applied directly
in machine control. The system further applies automated testing combined with
continuous diagnostics to provide process advisory.
In the field test, pipe-movement control automation, pump-rate control
automation, and automated wellbore-condition diagnostics were demonstrated,
proving fail-safe application of process safeguard enforcement and optimization
of operational procedures. Results from active and passive testing indicated
that the new methodology has the ability to improve drilling-process
reliability, safely increase drilling efficiency, and reduce the risk of human
error.
The authors provide a thorough description of the preparations and testing
and present an evaluation of the test results, with reference to success
criteria that were developed in cooperation with the field operator and
drilling contractors involved in the test. Implications for the work
organization are also discussed, particularly in relation to control of data
input, decision making, and responsibility.
The demonstrated technology applies direct integration of current know-how
and best practices into the drilling-control system, and available real-time
information is applied directly in controlling the drilling process.
© 2009. Society of Petroleum Engineers
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History
- Original manuscript received:
17 December 2007
- Meeting paper published:
4 March 2008
- Revised manuscript received:
28 November 2008
- Manuscript approved:
26 May 2009
- Published online:
12 November 2009
- Version of record:
23 December 2009
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