In the oil and gas industry, depth in a well is the distance along a well between a point of interest and a reference point or surface. It is the most common method of reference for locations in the well, and therefore, in oil industry speech, "depth" also refers to the location itself.
Strictly, depth is a vertical coordinate related to elevation, albeit in the opposite direction. However, "depth" in a well is not necessarily measured vertically or along a straight line.
Because wells are not always drilled vertically, there may be two "depths" for every given point in a wellbore: the measured depth (MD) measured along the path of the borehole, and the true vertical depth (TVD), the vertical distance between the datum and the point of interest. In perfectly vertical wells, the TVD equals the MD; otherwise, the TVD is less than the MD measured from the same datum.
Common datums used are ground level (GL), drilling rig floor (DF), Rotary table (RT), kelly bushing (KB or RKB) and mean sea level (MSL).
Welldepth may refer to: Depthinawell, a measurement of location in oil and gas drilling and production The charge capacity of each pixel ina charge-coupled...
homological algebra Depthinawell, the measurement between two points in an oil well Color depth (or "number of bits" or "bit depth"), in computer graphics...
lined well of 5.5 metres (18 ft) depth is documented from a drowned final PPN (c. 7000 BC) site at ‘Atlit-Yam off the coast near modern Haifa in Israel...
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world's longest borehole in terms of measured depth along the well bore (that is, borehole length) until it was surpassed in 2008 by the 12,289-metre-long...
true vertical depth, making the Kola Superdeep Borehole deeper by a factor of 6.9. Depthinawell True vertical depth Driller's depth Schlumberger (2011)...
fitted with a strainer, and a pump lifts water for irrigation. The required depth of the well depends on the depth of the water table. The tube well was invented...
well as Freud. All explore relationships between the conscious and the unconscious (thus including both psychoanalysis and Jungian psychology). Depth...
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also gave it a 90, calling it "a sleep-destroying puzzle metroidvania of baffling depth". Rebekah Valentine from IGN awarded Animal Wella 9/10, describing...
(a). This example oil well would be considered a directional well because it deviates from a straight vertical line. Depthinawell Driller's depth "True...
whose maximum depth is reliably known to exceed 400 metres (1,300 ft) Geologically, the Caspian Sea, like the Black and Mediterranean seas, is a remnant of...
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currents, skin depth also describes the exponential decay of the electric and magnetic fields, as well as the density of induced currents, inside a bulk material...
water). Depth conversion integrates several sources of information about the subsurface velocity to derive a three-dimensional velocity model: "Well tops"...
Color depth or colour depth (see spelling differences), also known as bit depth, is either the number of bits used to indicate the color of a single pixel...
The depth of field (DOF) is the distance between the nearest and the furthest objects that are in acceptably sharp focus in an image captured with a camera...
the ground or a building. Several physical quantities may be defined based on the definitions above: Depth below seafloor Depthinawell Drying height...
first ever well was drilled with percussion tools to adepth of 21 metres (69 ft) for oil exploration. In 1846–1848, the first modern oil wells were drilled...
applications. A diving depth gauge is a pressure gauge that displays the equivalent depth below the free surface in water. The relationship between depth and pressure...
The impact depth of a projectile is the distance it penetrates into a target before coming to a stop. The physicist Sir Isaac Newton first developed this...
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