METHOD AND SYSTEM FOR PREDICTING DRILLING EVENTS

摘要

A method comprising: calculating an expected wellbore energy for a planned wellpath, the calculating by a computer system; calculating an expected tortuosity of the planned wellpath using substantially the equation: n T - an_ 1 + (AD x 8j) i=1 D-D where T is the expected tortuosity of the wellpath; a is an inclination angle of the wellpath; AD is a distance between a first measurement location within the wellpath and a second measurement location within the wellpath; 6i is a dogleg severity value; and Di is a depth along the wellpath at a survey location i; calculating a first value indicative of probability of occurrence of a drilling event for drilling along the planned wellpath, the first value based on the expected wellbore energy and the expected tortuosity; and then drilling a wellbore along at least a first portion of the planned wellpath if the first value indicates the probability of the drilling event is less than a predetermined threshold.