The Target
The target is usually specified by the geologist, who will not merely define
a certain point as the target but also specify the acceptable tolerance (e.g. a
circle of radius 100 feet having the exact target as its center). Target zones
should be selected as large as possible to achieve the objective. If multiple
zones are to be penetrated, they should be selected so that the planned
pattern is reasonable and can be achieved without causing drilling
problems.
The target is usually specified by the geologist, who will not merely define
a certain point as the target but also specify the acceptable tolerance (e.g. a
circle of radius 100 feet having the exact target as its center). Target zones
should be selected as large as possible to achieve the objective. If multiple
zones are to be penetrated, they should be selected so that the planned
pattern is reasonable and can be achieved without causing drilling
problems.