Page 143 - Practical Well Planning and Drilling Manual

Section 1 revised 11/00/bc 1/17/01 2:56 PM Page 119

1.5.7
Directional Design [ ]

Bay, took one look at the leaning derrick, and climbed straight back on
the chopper again!)

1.5.7. Targets and Wellpath

To summarize, when choosing a planned wellpath, consider the
following:

1. Target locations and boundaries
2. Planned casing points
3. Natural formation tendencies (development area with good off-
set information)
4. BHA considerations and how they relate to directional and
drilling performance
5. Offset wells or geological features that are to be avoided and
that come close to your well
6. Lithologies in the buildup part of the hole
7. Orientation of the wellbore with respect to in-situ field stresses
8. Dogleg severity limitations

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