Detecting and mitigating borehole diameter enlargement

摘要

Borehole diameter enlargement occurs while drilling, circulating, reaming, and/or cleaning the borehole, and such borehole diameter enlargements can be detrimental to proper tripping of a drillstring or running of a casing string. Methods and systems are disclosed for detecting or measuring borehole diameter enlargement, diagnosing the cause of the borehole diameter enlargement, and potentially mitigating the borehole diameter enlargement based on the diagnosed and identified causes.

主权项

1. A method of detecting and mitigating borehole diameter enlargement comprising:
obtaining a borehole diameter curve indicative of a diameter of a drilled borehole at each of a plurality of depth bins along a length of the drilled borehole; obtaining at least one drilling parameter curve indicative of a drilling parameter of a drilling operation at each of the plurality of depth bins along the length of the drilled borehole; comparing the borehole diameter curve and the drilling parameter curve; correlating the drilling parameter with a borehole diameter enlargement based on the comparison, wherein the borehole diameter enlargement comprises a portion of the drilled borehole having enlarged diameter with respect to a primary portion of the drilled borehole.