This type of well has an inclination other than zero degrees from vertical.

This type of well has an inclination other than zero degrees from vertical.

• A. Vertical Well
• B. Deviated Well
• C. Horizontal Well
• D. Inclined Well

Answer: (B)

The key idea is how a borehole's path relates to vertical. A vertical well has no tilt from vertical (zero degrees). If the well path tilts away from vertical by any amount, it’s considered deviated from vertical. That makes the appropriate label the deviated well, since it covers any non-vertical trajectory, from small angles to nearly horizontal. A horizontal well is just a special case with a very large inclination, while the term inclined well isn’t as standard for the general category. So, a well with inclination other than zero degrees from vertical is best described as a deviated well.

The key idea is how a borehole's path relates to vertical. A vertical well has no tilt from vertical (zero degrees). If the well path tilts away from vertical by any amount, it’s considered deviated from vertical. That makes the appropriate label the deviated well, since it covers any non-vertical trajectory, from small angles to nearly horizontal. A horizontal well is just a special case with a very large inclination, while the term inclined well isn’t as standard for the general category. So, a well with inclination other than zero degrees from vertical is best described as a deviated well.