Coupled geomechanics, thermal and fluid flow model for wellbore integrity analysis, A
Wellbore instability often results in nonproductive time and is costly for drilling operations as well as long term integrity of the wellbore. The most important factor that affects the stability of the bore wall is the drilling fluid density. High density drilling fluid can cause a fracture in the wellbore because the hydrostatic pressure in the wellbore causes tensile failure in the bore wall. Using low density fluid often results in the collapse of the wellbore because the hydrostatic pressure is not sufficient to balance the in-situ stresses around wellbore. Hence, determining a proper mud ...
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