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http://dx.doi.org/10.12814/jkgss.2017.16.2.183

Numerical Analysis of Borehole Stability Depending on Drilling Fluid  

Sin, Chun-won (School of Civil and Environmental Engineering, Sungkyunkwan Univ. Natural Sciences Campus)
Yoo, Chung-Sik (School of Civil and Environmental Engineering, Sungkyunkwan Univ. Natural Sciences Campus)
Publication Information
Journal of the Korean Geosynthetics Society / v.16, no.2, 2017 , pp. 183-194 More about this Journal
Abstract
When a borehole is drilled, the load distributed by the removal is taken to re-establish equilibrium. As a result, the stresses around the borehole is redistributed. If there is no hydrostatic support pressure by drilling fluid (mud) introduced into the borehole, failure in the formation may take place. The mud pressure boundary that keeps the borehole stable is defined as a mud window. To predict the potential for failures around the borehole, a series of numerical analysis were performed and compared with a mud window. The effect of failure criterion and the intial stress ratio adopted on the mud window was also studied.
Keywords
Poroelasticity analysis; Mud window; Drilling fluid; Borehole;
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