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Unformatted text preview: blowouts.
56 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 28 2. Introduction
A kick can be defined as a well control
problem in which the pressure found
within the drilled rock is greater than the
mud hydrostatic pressure acting on the
boroehole in the rock.
A blowout is the result of an uncontrolled
57 3. Caused of Kicks
The formation pressure will
exceed the mud pressure and a
kick will occur. 58 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 29 B. Insufficient mud weight
Insufficient mud weight is one of the
predominant causes of kicks. A
permeable zone was drilled while using
a mud weight that exerted less pressure
than the formation pressure within the
59 C. Improper Hole Fill-up
The drill pipe is pulled put of the hole the
mud level falls due to the fact that the drill
pipe steel had displaced some amount of
mud. With the pipe no longer in the hole,
the mud must fill the spaces where the
pipe had been. Therefore, the overall mud
level decreases, and as a consequence,
the hydrostatic pressure of the mud also
decreased due to a shorter colum...
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This document was uploaded on 03/28/2014.
- Fall '14