Chapter 24. Correcting missties in stacking velocities
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Chapter 24. Correcting missties in stacking velocities
Table of Contents
Correcting missties in stacking velocities
Regular stacking velocities
Adjusting missties in stacking velocities
Result of misstie corrections
Options in misstie corrections
Correcting missties in stacking velocities
Stacking velocities is input when creating a velocity cube. It is thus of great importance that the quality is good so the use of the velocity cube in depth conversion can be reliable.
One source of error can be missties in stacking velocities; i.e. crossing lines of stacking velocities show different values in the crossing points.
Example of missties in stacking velocities.
The missties can be corrected if the stacking velocities are regular.
Regular stacking velocities
The concept regular stacking velocities means a set of survey lines where all lines hold the same number of vertical values in regular depth or time positions. If not regular, use the command object Make regular stacking velocity to transform the stacking velocity dataset.
Menu for transforming stacking velocities to a regular form.
In many cases the stacking velocities are already in a regular form. But some typical cases where it is not are when two set of stacking velocities from different surveys shall be merged and there are obvious missties. In those cases it it necessary to make all the stacking velocity data regular with the same number of vertical registrations.
Adjusting missties in stacking velocities
Activate the command object Adjust stacking velocity lines found under the entry Regular Stacking Velocities.
Command objects for adjusting misstie in stacking velocities.
It is also possible to have a weigth factor when doing correction. It should be applied if the adjustment has to be performed on both crossing sections, f.inst. 0.7 on one and then no adjustment using the other as input.
Result of misstie corrections
Stacking velocity after correcting for missties
The correction was done with the menu Adjust stacking velocity lines. Be sure to have the parameters correctly set and click Execute.
Options in misstie corrections
There are other features and options within the misstie correction concept. Especially if one wants to regulate the stacking velocties for a section within a vertical area described with a digitized boundary. In that case read the article Working with regular stacking velocities.
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