WellCAD Basics - Advanced Logic Technology

172 - BOOK 1 - WELLCAD BASICS
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Method:
It is possible to calculate the volume of an entire hole (Hole volume). If this option
has been chosen, only the borehole diameter (Volume Diameter – External) needs
to be defined.
If the option Annular volume has been chosen, the volume calculated using the
internal diameter (Volume Diameter – Internal) will be subtracted from the
volume calculated using the external diameter.
The terms external and internal diameter are used in the following sense: If the
annular volume between casing and borehole wall is calculated the external diameter
refers to the diameter between the borehole walls and the internal diameter refers to
the casing outer diameter.
Depth:
Set the depth range for which the selected volume will be computed. The total
minimum and maximum depth limits of the hole are shown next to the edit boxes.
Direction:
Select if the volume is calculated from bottom to top or from top to bottom of the
hole.
Volume Diameter:
Data from Well and Image logs can be used as input channel. Select the logs from
the corresponding drop down list and set appropriate units. It is also possible to
enter a constant value directly into the controls edit box. If an Image Logs is used as
input channel the values stored in the log are assumed to be radius values. Well Log
data and constant values are assumed to be diameters. The Internal diameter refers
to the internal diameter of the annulus, while the External diameter corresponds to
the external diameter of the annulus.
Click the Next button to proceed with the next step of the Volume Calculation
Wizard. It allows you define the way of data output.