Positional Uncertainty

Positional Uncertainty

During the drilling operations phase the positional uncertainty must be monitored, especially when drilling in hole sections which exhibit collision risk.

All borehole position calculations for well design, the survey database and well monitoring shall be performed with the Directional Drilling Contractor software.

Anti-Collision Preferences Survey Tool Error System

The system used in Company is the Directional Drilling Contractor software.

Borehole Position Scan Method

Closest 3D Approach

Borehole Position Error Surface

Elliptical Conic

Clearance Ratio

The Clearance Ration is defined as: 

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