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→Horizontal wells
==Horizontal wells==
==Horizontal wells==
[[file:M91Figure161.JPG|thumb|400px|{{figure number|1|}}Horizontal wells are drilled at a high angle, generally greater than 80°, with the intent of keeping the well within a specific reservoir interval or hydrocarbon zone.<ref name=Shepherd_2009>Shepherd, Mike, 2009, Types of wells, ''in'' M. Shepherd, Oil field production geology, AAPG Memoir 91, p. 231-297.</ref>]]
[[file:M91Figure161.JPG|thumb|400px|{{figure number|1|}}Horizontal wells are drilled at a high angle, generally greater than 80°, with the intent of keeping the well within a specific reservoir interval or hydrocarbon zone.<ref name=Shepherd_2009>Shepherd, Mike, 2009, [http://archives.datapages.com/data/specpubs/memoir91/CHAPTER28/CHAPTER28.HTM Types of wells], ''in'' M. Shepherd, Oil field production geology, [http://store.aapg.org/detail.aspx?id=788 AAPG Memoir 91], p. 231-297.</ref>]]
Horizontal wells are wells where the reservoir section is drilled at a high angle, typically with a trajectory to keep the well within a specific reservoir interval or hydrocarbon zone. In a strict sense, these wells are rarely perfectly horizontal, but they tend to be near horizontal mostly, generally at an angle greater than 80° from vertical.
Horizontal wells are wells where the reservoir section is drilled at a high angle, typically with a trajectory to keep the well within a specific reservoir interval or hydrocarbon zone. In a strict sense, these wells are rarely perfectly horizontal, but they tend to be near horizontal mostly, generally at an angle greater than 80° from vertical.