Survey Accuracy As A Function Of Inclination
B error
VERTICAL
NORTH
Berror IS A LARGER PERCENTAGE OF Bref AT HIGHER INCLINATIONS
VERTICAL
For systematic uncertainty, the uncertainty is along the Z-axis. This will result in decreased survey accuracy when drilling east or west as opposed to drilling north or south. This is due to the fact that Berror will tend to pull Bref in the direction of the Z-axis, away from Bn. This relationship is shown in the figure below.
Post a comment