Systems, methods, and devices for predicting borehole geometry

摘要

System, methods and devices for measuring and predicting complex borehole geometries are presented herein. A method is disclosed for determining a trajectory of a borehole that is generated by a drill string. The method includes: receiving data indicative of one or more drilling parameters between at least two survey points; averaging the received data over predetermined increments between the at least two survey points; calculating from at least the averaged data a predicted drill string response for each of the predetermined increments; determining from at least the predicted drill string response a change in inclination and azimuth for each of the predetermined increments; generating a predicted wellbore trajectory from the change in inclination and azimuth; comparing the predicted wellbore trajectory to a measured wellbore trajectory; and, if the comparison is favorable, determining a probable borehole position from the change in inclination and azimuth for each of the predetermined increments.

主权项

1. A method for determining a trajectory of a borehole generated by a directional drilling system having one or more sensing devices operatively connected to a drill string with a steerable downhole assembly and a rotatable drill bit, the method comprising:
receiving, from at least one of the one or more electronic sensing devices operatively connected to the drill string, data indicative of one or more drilling parameters between at least two survey points; averaging, via at least one of one or more controllers, the received data over predetermined increments between the at least two survey points; calculating, via at least one of the one or more controllers from at least the averaged data, a predicted drill string response for each of the predetermined increments; determining, via at least one of the one or more controllers from at least the predicted drill string response, a change in inclination and azimuth for each of the predetermined increments; generating, via at least one of the one or more controllers, a predicted wellbore trajectory from at least the change in inclination and azimuth; comparing, via at least one of the one or more controllers, the predicted wellbore trajectory to a measured wellbore trajectory; if the comparison is favorable, determining, via at least one of the one or more controllers, a probable borehole position from at least the change in inclination and azimuth for each of the predetermined increments; and storing, via at least one of one or more memory devices, a representation of the predicted wellbore trajectory and the probable borehole position.