Unformatted text preview: depth is
245 At the point both a shallowest and a
deepest liner setting depth will be known,
the liner cannot be set until the shallowest
depth is reached, and must be set by the
time the deepest depth is reached. It is
always desirable to minimize small diameter
hole, therefore the deepest liner depth will
generally be the objective(Fig.1).
246 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 123 Fig.1 247 It is possible, in some prospect wells, for
more than one drilling liner to be required.
This will be indicated when the shallowest
liner point is deeper than the deepest liner
point(Fig.2). 248 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 124 Fig.2 249 Surface Casing Point
The last step is the determination of the surface casing
setting depth. Assume a setting depth(3000 ft is good
first point). Calculate the ΣEMW for design size kick
and gain at the assumed depth for the intermediated
casing point. Use equations 1,2, and 3. Compare the
ΣEMW to the fracture gradient at the assumed depth.
If the ΣEMW is greater then the fracture gradient, the
surface casing point...
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This document was uploaded on 03/28/2014.
- Fall '14