Horizontal wells
For many applications, the best well profile is one in which the inclination
is built to 90° or even higher.
Allocation of slots to targets
Even this is not always a simple task. From a directional driller's
viewpoint, slots on the North East side of the platform or pad should be
used for wells whose targets are in a North Easterly direction.
Unfortunately there are other considerations (e.g. water injection wells
may have to be grouped together for manifolding requirements). Also, as
more wells are drilled and the reservoir model is upgraded, targets can be
changed or modified.
Inner slots are used to drill to the innermost targets (i.e. targets with the
smallest horizontal distances from the platform) and these wells will be
given slightly deeper kick-off points. The outer slots are used to drill to
targets which are furthest from the platform. These wells will be given
shallow kick-off points and higher build-up rates to keep the maximum
inclination as low as possible.
For many applications, the best well profile is one in which the inclination
is built to 90° or even higher.
Allocation of slots to targets
Even this is not always a simple task. From a directional driller's
viewpoint, slots on the North East side of the platform or pad should be
used for wells whose targets are in a North Easterly direction.
Unfortunately there are other considerations (e.g. water injection wells
may have to be grouped together for manifolding requirements). Also, as
more wells are drilled and the reservoir model is upgraded, targets can be
changed or modified.
Inner slots are used to drill to the innermost targets (i.e. targets with the
smallest horizontal distances from the platform) and these wells will be
given slightly deeper kick-off points. The outer slots are used to drill to
targets which are furthest from the platform. These wells will be given
shallow kick-off points and higher build-up rates to keep the maximum
inclination as low as possible.
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