Changes

[[file:wellbore-trajectory_fig8.png|300px|thumb|{{figure number|8}}Build rates for classification of horizontal wells.]]

[[file:wellbore-trajectory_fig8.png|300px|thumb|{{figure number|8}}Build rates for classification of horizontal wells.]]

A ''horizontal well'' is a special type of directional well. At a predetermined depth, the well is kicked off and, the angle is built to a 90 ° inclination. The major reasons for horizontal drilling are

A [[Well types#Horizontal wells|''horizontal well'']] is a special type of directional well. At a predetermined depth, the well is kicked off and, the angle is built to a 90 ° inclination. The major reasons for horizontal drilling are

* Intersecting many vertical fractures in a single wellbore

* Intersecting many vertical fractures in a single wellbore