Definition - What does Depth mean?
Generally depth is defined as the distance from the top to the bottom of a surface. It is also referred to as the measurement of the distance to and from the reference points of the well. It is also called depth in a well or the location of oil reservoir. The distance or depth is not essentially measured in a vertical direction of a well.
Petropedia explains Depth
In the oil industry, depth is a term that is usually referred to location underneath or the distance from a point of elevation for a well. There is another term that is used for it, depth in a well. Either ways, the term depth is used to measure the distance of the well from the top to bottom. However, because a well may not always be present in a vertical position, the term depth can vary for every wellbore. There are several different forms of depths such as true vertical depth, measured depth, driller’s depth etc.
Unlocking Unconventional Energy Potential Through Hydraulic Fracturing