Changes

==Measured depth versus true vertical depth==

==Measured depth versus true vertical depth==

Table 1 shows values for the percentage difference between measured depth and true vertical depth for varying degrees of deviation, and for the horizontal displacement (also as a percentage of measured depth) for a well segment of constant deviation. For most map and cross section scales, depth corrections for wells deviated less than 3′ are almost undetectable. For wells deviated by a larger number of degrees, large depth and horizontal displacement deviations could lead to substantial misplacements of a geological marker and the consequent distortion of structural and stratigraphic relationships.

Table 1 shows values for the percentage difference between measured depth and true vertical depth for varying degrees of deviation, and for the horizontal displacement (also as a percentage of measured depth) for a well segment of constant deviation. For most map and [[cross section]] scales, depth corrections for wells deviated less than 3′ are almost undetectable. For wells deviated by a larger number of degrees, large depth and horizontal displacement deviations could lead to substantial misplacements of a geological marker and the consequent distortion of structural and stratigraphic relationships.

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{| class = "wikitable"