What is measured depth in oil and gas?
In the oil industry measured depth (commonly referred to as MD, or just the depth), is the length of the borehole. In conventional vertical wells, this coincides with the true vertical depth, but in directional or horizontal wells, especially those using extended reach drilling, the two can deviate greatly.
What does Tvdss stand for?
True Vertical Depth
TVDSS is True Vertical Depth SS. This is measured from mean sea level (MSL). It does not reference KB. Kelly Bushing (KB) is the height of the Derek (drill rig) measured from the MSL. The interpreter should manually enter the KB height under the well info tab (see Creating a New Well).
What is true vertical thickness?
The measured thickness in a vertical well (or along a vertical traverse) is the true vertical thickness (TVT). A “thickness” measurement that is easily derived from well data is the TVD or true vertical depth thickness, and is the difference in elevation between the top and base of a unit in a well log.
What is the measurement of depth?
Commonly abbreviated as D, depth is a measurement of how far back a three-dimensional object is. For example, measurements of an object, such as a computer monitor, are commonly measured as (D x W x H), short for Depth by Width by Height. In the illustration, the Z-axis is the depth.
How do you calculate true vertical thickness?
1. Vertical strata: if the map surface is relatively horizontal, the distance measured perpendicular to the contacts is the true thickness. 2. Horizontal strata: the elevation difference between the upper and lower contacts is the thickness.
How is true thickness measured?
True thickness = outcrop length in traverse direction X sin (apparent dip + or – slope angle) . cos (true dip) divided by cos (apparent dip).
What is too deep for a well?
In order to allow for maximum ground filtration to remove impurities, your well depth should be at least 100 feet. As a general rule, the deeper you drill, it’s more likely that there will be minerals present.