Directional Drilling: Trajectory Design and Position Uncertainty Study for a Laboratory Drilling Rig.
Master thesis
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https://hdl.handle.net/11250/2685334Utgivelsesdato
2020-06-19Metadata
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- Studentoppgaver (TN-IEP) [323]
Sammendrag
This thesis investigates how trajectory optimisation and position uncertainty calcu-
lations can be performed on a laboratory drilling rig.
The improvements made are to be used on the drilling rig designed and manufactured
by UiS Drillbotics team, for the international Drillbotics competition. This year's
competition presented a new set of challenges, including a pre-planned trajectory,
hitting target points before exiting the well and an integrated error model. The
requirements are presented in detail in the guidelines provided by Drilling Systems
Automation Technical Section (DSATS) committee.
The models presented in this thesis are intended to advance the current system,
where automated optimisation of trajectories and position uncertainty calculations
can easily be performed and visualised. Using Bezier curves for trajectory optimisa-
tion and the ISCWSA error model, these calculations are presented and tested for
both fi eld cases, and generated trajectories with the dimensions of the laboratory
drilling rig.
The solutions presented offers a possibility to intuitively visualise the results to the
driller and observers. The trajectory optimisation is a process conducted before any
drilling is initiated, and imported to the main GUI for comparison between planned
trajectory and drilled trajectory. The position uncertainty calculations are
exible, and can be speci cally con gured for different sensor packages and con dence lev-
els. The uncertainty calculations are plotted together with the trajectory, which
enables the driller and system to identify deviations and reconsider the trajectory if
necessary.
Beskrivelse
Master's thesis in petroleum engineering.