MANAGING WELLBORE EXPLOITATION WITH USE OF UNCERTAINTY CALCULATIONS Russian patent published in 2018 - IPC E21B44/02 E21B47/22 E21B7/06 G06F17/50 

FIELD: measuring equipment.

SUBSTANCE: method includes identifying the BHA dynamics model, determining the calculated wellbore trajectory based on the BHA dynamics model, and determining the uncertainty of the calculated wellbore trajectory. Wherein determining the uncertainty of the calculated wellbore trajectory includes determining the estimated interference variance for the BHA dynamics model, determining the variances of the calculated results of the azimuth measurements and the calculated results of the wellbore trajectory inclination angle measurements based on the estimated interference variance, and determining the weighted combination of the variances of the calculated results of the azimuth measurements and the calculated results of the wellbore trajectory inclination angle measurements.

EFFECT: increasing the accuracy of determining the uncertainty of the calculated wellbore trajectory and increasing the accuracy of determining the estimated wellbore trajectory.

23 cl, 10 dwg