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Oilfield Glossary
Oilfield Glossary
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wellbore orientation

1. n. [Drilling]
Wellbore direction. Wellbore orientation may be described in terms of inclination and azimuth. Inclination refers to the vertical angle measured from the down direction—the down, horizontal and up directions have inclinations of 0°, 90° and 180°, respectively. Azimuth refers to the horizontal angle measured clockwise from true north—the north, east, south and west directions have azimuths of 0°, 90°, 180° and 270°, respectively.